build: bump version 1.0.0a7 → 1.0.0a8

omega trace normalization and matrix profile visualization

.bumpversion.cfg

@@ -1,10 +1,15 @@
 [bumpversion]
-current_version = 0.1.8
+current_version = 1.0.0a8
 commit = True
 tag = True
-parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)
+parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)((?P<release>[a-zA-Z0-9_.-]+))?
-serialize = {major}.{minor}.{patch}
+serialize = 
+	{major}.{minor}.{patch}-{release}
+	{major}.{minor}.{patch}
+message = build: bump version {current_version} → {new_version}
 
 [bumpversion:file:setup.py]
 
 [bumpversion:file:./prototorch/models/__init__.py]
+
+[bumpversion:file:./docs/source/conf.py]

.codacy.yml

@@ -1,15 +0,0 @@
-# To validate the contents of your configuration file
-# run the following command in the folder where the configuration file is located:
-# codacy-analysis-cli validate-configuration --directory `pwd`
-# To analyse, run:
-# codacy-analysis-cli analyse --tool remark-lint --directory `pwd`
----
-engines:
-  pylintpython3:
-    exclude_paths:
-      - config/engines.yml
-  remark-lint:
-    exclude_paths:
-      - config/engines.yml
-exclude_paths:
-  - 'tests/**'

.codecov.yml

@@ -1,2 +0,0 @@
-comment:
-  require_changes: yes

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,38 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Steps to reproduce the behavior**
+1. ...
+2. Run script '...' or this snippet:
+```python
+import prototorch as pt
+
+...
+```
+3. See errors
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Observed behavior**
+A clear and concise description of what actually happened.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**System and version information**
+- OS: [e.g. Ubuntu 20.10]
+- ProtoTorch Version: [e.g. 0.4.0]
+- Python Version: [e.g. 3.9.5]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/examples.yml

@@ -0,0 +1,25 @@
+# Thi workflow will install Python dependencies, run tests and lint with a single version of Python
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: examples
+
+on:
+  push:
+    paths:
+      - 'examples/**.py'
+jobs:
+  cpu:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v2
+      with:
+        python-version: "3.10"
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install .[all]
+    - name: Run examples
+      run: |
+        ./tests/test_examples.sh examples/

.github/workflows/pythonapp.yml

@@ -0,0 +1,76 @@
+# This workflow will install Python dependencies, run tests and lint with a single version of Python
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: tests
+
+on:
+  push:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  style:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v2
+      with:
+        python-version: "3.10"
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install .[all]
+    - uses: pre-commit/action@v3.0.0
+  compatibility:
+    needs: style
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        os: [ubuntu-latest, windows-latest]
+        exclude:
+        - os: windows-latest
+          python-version: "3.7"
+        - os: windows-latest
+          python-version: "3.8"
+        - os: windows-latest
+          python-version: "3.9"
+        - os: windows-latest
+          python-version: "3.11"
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install .[all]
+    - name: Test with pytest
+      run: |
+        pytest
+  publish_pypi:
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+    needs: compatibility
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v2
+      with:
+        python-version: "3.10"
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install .[all]
+        pip install wheel
+    - name: Build package
+      run: python setup.py sdist bdist_wheel
+    - name: Publish a Python distribution to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        user: __token__
+        password: ${{ secrets.PYPI_API_TOKEN }}

.gitignore

@@ -128,14 +128,19 @@ dmypy.json
 # Pyre type checker
 .pyre/
 
-# Datasets
-datasets/
-
-# PyTorch-Lightning
-lightning_logs/
-
 .vscode/
 
+# Vim
+*~
+*.swp
+*.swo
+
 #  Pytorch Models or Weights
 #  If necessary make exceptions for single pretrained models
 *.pt
+
+# Artifacts created by ProtoTorch Models
+datasets/
+lightning_logs/
+examples/_*.py
+examples/_*.ipynb

.pre-commit-config.yaml

@@ -1,54 +1,59 @@
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
-repos:
--   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.0.1
-    hooks:
-    -   id: trailing-whitespace
-    -   id: end-of-file-fixer
-    -   id: check-yaml
-    -   id: check-added-large-files
-    -   id: check-ast
-    -   id: check-case-conflict
 
+repos:
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v4.3.0
+  hooks:
+  - id: trailing-whitespace
+    exclude: (^\.bumpversion\.cfg$|cli_messages\.py)
+  - id: end-of-file-fixer
+  - id: check-yaml
+  - id: check-added-large-files
+  - id: check-ast
+  - id: check-case-conflict
 
 - repo: https://github.com/myint/autoflake
-  rev: v1.4
+  rev: v1.7.7
   hooks:
-  -   id: autoflake
+  - id: autoflake
 
 - repo: http://github.com/PyCQA/isort
-  rev: 5.8.0
+  rev: 5.10.1
   hooks:
-  -   id: isort
+  - id: isort
 
--   repo: https://github.com/pre-commit/mirrors-mypy
+- repo: https://github.com/pre-commit/mirrors-mypy
-    rev: 'v0.902'
+  rev: v0.982
-    hooks:
+  hooks:
-    -   id: mypy
+  - id: mypy
-        files: prototorch
+    files: prototorch
-        additional_dependencies: [types-pkg_resources]
+    additional_dependencies: [types-pkg_resources]
 
--   repo: https://github.com/pre-commit/mirrors-yapf
+- repo: https://github.com/pre-commit/mirrors-yapf
-    rev: 'v0.31.0'  # Use the sha / tag you want to point at
+  rev: v0.32.0
-    hooks:
+  hooks:
-    -   id: yapf
+  - id: yapf
 
--   repo: https://github.com/pre-commit/pygrep-hooks
+- repo: https://github.com/pre-commit/pygrep-hooks
-    rev: v1.9.0  # Use the ref you want to point at
+  rev: v1.9.0
-    hooks:
+  hooks:
-    -   id: python-use-type-annotations
+  - id: python-use-type-annotations
-    -   id: python-no-log-warn
+  - id: python-no-log-warn
-    -   id: python-check-blanket-noqa
+  - id: python-check-blanket-noqa
 
+- repo: https://github.com/asottile/pyupgrade
+  rev: v3.1.0
+  hooks:
+  - id: pyupgrade
 
--   repo: https://github.com/asottile/pyupgrade
+- repo: https://github.com/si-cim/gitlint
-    rev: v2.19.4
+  rev: v0.15.2-unofficial
-    hooks:
+  hooks:
-    -   id: pyupgrade
+  - id: gitlint
+    args: [--contrib=CT1, --ignore=B6, --msg-filename]
 
--   repo: https://github.com/jorisroovers/gitlint
+- repo: https://github.com/dosisod/refurb
-    rev: "v0.15.1"
+  rev: v1.4.0
-    hooks:
+  hooks:
-    -   id: gitlint
+    - id: refurb
-        args: [--contrib=CT1, --ignore=B6, --msg-filename]

.travis.yml

@@ -1,25 +0,0 @@
-dist: bionic
-sudo: false
-language: python
-python: 3.9
-cache:
-  directories:
-  - "$HOME/.cache/pip"
-  - "./tests/artifacts"
-  - "$HOME/datasets"
-install:
-- pip install git+git://github.com/si-cim/prototorch@dev --progress-bar off
-- pip install .[all] --progress-bar off
-script:
-- coverage run -m pytest
-- ./tests/test_examples.sh examples/
-after_success:
-- bash <(curl -s https://codecov.io/bash)
-deploy:
-  provider: pypi
-  username: __token__
-  password:
-    secure: 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
-  on:
-    tags: true
-    skip_existing: true

README.md

@@ -1,6 +1,5 @@
 # ProtoTorch Models
 
-[![Build Status](https://api.travis-ci.com/si-cim/prototorch_models.svg?branch=main)](https://travis-ci.com/github/si-cim/prototorch_models)
 [![GitHub tag (latest by date)](https://img.shields.io/github/v/tag/si-cim/prototorch_models?color=yellow&label=version)](https://github.com/si-cim/prototorch_models/releases)
 [![PyPI](https://img.shields.io/pypi/v/prototorch_models)](https://pypi.org/project/prototorch_models/)
 [![GitHub license](https://img.shields.io/github/license/si-cim/prototorch_models)](https://github.com/si-cim/prototorch_models/blob/master/LICENSE)
@@ -20,23 +19,6 @@ pip install prototorch_models
 of** [ProtoTorch](https://github.com/si-cim/prototorch). The plugin should then
 be available for use in your Python environment as `prototorch.models`.
 
-## Contribution
-
-This repository contains definition for [git hooks](https://githooks.com).
-[Pre-commit](https://pre-commit.com) is automatically installed as development
-dependency with prototorch or you can install it manually with `pip install
-pre-commit`.
-
-Please install the hooks by running:
-```bash
-pre-commit install
-pre-commit install --hook-type commit-msg
-```
-before creating the first commit.
-
-The commit will fail if the commit message does not follow the specification
-provided [here](https://www.conventionalcommits.org/en/v1.0.0/#specification).
-
 ## Available models
 
 ### LVQ Family
@@ -53,6 +35,7 @@ provided [here](https://www.conventionalcommits.org/en/v1.0.0/#specification).
 - Soft Learning Vector Quantization (SLVQ)
 - Robust Soft Learning Vector Quantization (RSLVQ)
 - Probabilistic Learning Vector Quantization (PLVQ)
+- Median-LVQ
 
 ### Other
 
@@ -68,7 +51,6 @@ provided [here](https://www.conventionalcommits.org/en/v1.0.0/#specification).
 
 ## Planned models
 
-- Median-LVQ
 - Generalized Tangent Learning Vector Quantization (GTLVQ)
 - Self-Incremental Learning Vector Quantization (SILVQ)
 
@@ -103,6 +85,23 @@ To assist in the development process, you may also find it useful to install
 please avoid installing Tensorflow in this environment. It is known to cause
 problems with PyTorch-Lightning.**
 
+## Contribution
+
+This repository contains definition for [git hooks](https://githooks.com).
+[Pre-commit](https://pre-commit.com) is automatically installed as development
+dependency with prototorch or you can install it manually with `pip install
+pre-commit`.
+
+Please install the hooks by running:
+```bash
+pre-commit install
+pre-commit install --hook-type commit-msg
+```
+before creating the first commit.
+
+The commit will fail if the commit message does not follow the specification
+provided [here](https://www.conventionalcommits.org/en/v1.0.0/#specification).
+
 ## FAQ
 
 ### How do I update the plugin?

docs/source/conf.py

@@ -23,7 +23,7 @@ author = "Jensun Ravichandran"
 
 # The full version, including alpha/beta/rc tags
 #
-release = "0.4.4"
+release = "1.0.0-a8"
 
 # -- General configuration ---------------------------------------------------
 

docs/source/index.rst

@@ -23,6 +23,13 @@ ProtoTorch Models Plugins
 
    custom
 
+.. toctree::
+   :hidden:
+   :maxdepth: 3
+   :caption: Proto Y Architecture
+
+   y-architecture
+
 About
 -----------------------------------------
 `Prototorch Models <https://github.com/si-cim/prototorch_models>`_ is a Plugin
@@ -33,8 +40,10 @@ prototype-based Machine Learning algorithms using `PyTorch-Lightning
 Library
 -----------------------------------------
 Prototorch Models delivers many application ready models.
-These models have been published in the past and have been adapted to the Prototorch library.
+These models have been published in the past and have been adapted to the
+Prototorch library.
 
 Customizable
 -----------------------------------------
-Prototorch Models also contains the building blocks to build own models with PyTorch-Lightning and Prototorch.
+Prototorch Models also contains the building blocks to build own models with
+PyTorch-Lightning and Prototorch.

docs/source/library.rst

@@ -71,7 +71,7 @@ Probabilistic Models
 Probabilistic variants assume, that the prototypes generate a probability distribution over the classes.
 For a test sample they return a distribution instead of a class assignment.
 
-The following two algorihms were presented by :cite:t:`seo2003` .
+The following two algorithms were presented by :cite:t:`seo2003` .
 Every prototypes is a center of a gaussian distribution of its class, generating a mixture model.
 
 .. autoclass:: prototorch.models.probabilistic.SLVQ
@@ -80,7 +80,7 @@ Every prototypes is a center of a gaussian distribution of its class, generating
 .. autoclass:: prototorch.models.probabilistic.RSLVQ
    :members:
 
-:cite:t:`villmann2018` proposed two changes to RSLVQ: First incooperate the winning rank into the prior probability calculation.
+:cite:t:`villmann2018` proposed two changes to RSLVQ: First incorporate the winning rank into the prior probability calculation.
 And second use divergence as loss function.
 
 .. autoclass:: prototorch.models.probabilistic.PLVQ
@@ -106,7 +106,7 @@ Visualization
 Visualization is very specific to its application.
 PrototorchModels delivers visualization for two dimensional data and image data.
 
-The visulizations can be shown in a seperate window and inside a tensorboard.
+The visualizations can be shown in a separate window and inside a tensorboard.
 
 .. automodule:: prototorch.models.vis
    :members:

docs/source/y-architecture.rst

@@ -0,0 +1,71 @@
+.. Documentation of the updated Architecture.
+
+Proto Y Architecture
+========================================
+
+Overview
+****************************************
+
+The Proto Y Architecture is a framework for abstract prototype learning methods.
+
+It divides the problem into multiple steps:
+
+    * **Components** : Recalling the position and metadata of the components/prototypes.
+    * **Backbone** : Apply a mapping function to data and prototypes.
+    * **Comparison** : Calculate a dissimilarity based on the latent positions.
+    * **Competition** : Calculate competition values based on the comparison and the metadata.
+    * **Loss** : Calculate the loss based on the competition values
+    * **Inference** : Predict the output based on the competition values.
+
+Depending on the phase (Training or Testing) Loss or Inference is used.
+
+Inheritance Structure
+****************************************
+
+The Proto Y Architecture has a single base class that defines all steps and hooks
+of the architecture.
+
+.. autoclass:: prototorch.y.architectures.base.BaseYArchitecture
+
+    **Steps**
+
+    Components
+
+    .. automethod:: init_components
+    .. automethod:: components
+
+    Backbone
+
+    .. automethod:: init_backbone
+    .. automethod:: backbone
+
+    Comparison
+
+    .. automethod:: init_comparison
+    .. automethod:: comparison
+
+    Competition
+
+    .. automethod:: init_competition
+    .. automethod:: competition
+
+    Loss
+
+    .. automethod:: init_loss
+    .. automethod:: loss
+
+    Inference
+
+    .. automethod:: init_inference
+    .. automethod:: inference
+
+    **Hooks**
+
+    Torchmetric
+
+    .. automethod:: register_torchmetric
+
+Hyperparameters
+****************************************
+Every model implemented with the Proto Y Architecture has a set of hyperparameters,
+which is stored in the ``HyperParameters`` attribute of the architecture.

examples/cbc_iris.py

@@ -1,50 +0,0 @@
-"""CBC example using the Iris dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    train_ds = pt.datasets.Iris(dims=[0, 2])
-
-    # Reproducibility
-    pl.utilities.seed.seed_everything(seed=42)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=32)
-
-    # Hyperparameters
-    hparams = dict(
-        distribution=[2, 2, 2],
-        proto_lr=0.1,
-    )
-
-    # Initialize the model
-    model = pt.models.CBC(
-        hparams,
-        prototype_initializer=pt.components.SSI(train_ds, noise=0.01),
-    )
-
-    # Callbacks
-    vis = pt.models.VisCBC2D(data=train_ds,
-                             title="CBC Iris Example",
-                             resolution=100,
-                             axis_off=True)
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[vis],
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/cli/README.md

@@ -1,8 +0,0 @@
-# Examples using Lightning CLI
-
-Examples in this folder use the experimental [Lightning CLI](https://pytorch-lightning.readthedocs.io/en/latest/common/lightning_cli.html).
-
-To use the example run
-```
-python gmlvq.py --config gmlvq.yaml
-```

examples/cli/gmlvq.py

@@ -1,20 +0,0 @@
-"""GMLVQ example using the MNIST dataset."""
-
-import torch
-from pytorch_lightning.utilities.cli import LightningCLI
-
-import prototorch as pt
-from prototorch.models import ImageGMLVQ
-from prototorch.models.abstract import PrototypeModel
-from prototorch.models.data import MNISTDataModule
-
-
-class ExperimentClass(ImageGMLVQ):
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams,
-                         optimizer=torch.optim.Adam,
-                         prototype_initializer=pt.components.zeros(28 * 28),
-                         **kwargs)
-
-
-cli = LightningCLI(ImageGMLVQ, MNISTDataModule)

examples/cli/gmlvq.yaml

@@ -1,11 +0,0 @@
-model:
-  hparams:
-    input_dim: 784
-    latent_dim: 784
-    distribution:
-      num_classes: 10
-      prototypes_per_class: 2
-    proto_lr: 0.01
-    bb_lr: 0.01
-data:
-  batch_size: 32

examples/dynamic_pruning.py

@@ -1,82 +0,0 @@
-"""Dynamically prune 'loser' prototypes in GLVQ-type models."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    num_classes = 4
-    num_features = 2
-    num_clusters = 1
-    train_ds = pt.datasets.Random(num_samples=500,
-                                  num_classes=num_classes,
-                                  num_features=num_features,
-                                  num_clusters=num_clusters,
-                                  separation=3.0,
-                                  seed=42)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=256)
-
-    # Hyperparameters
-    prototypes_per_class = num_clusters * 5
-    hparams = dict(
-        distribution=(num_classes, prototypes_per_class),
-        lr=0.2,
-    )
-
-    # Initialize the model
-    model = pt.models.CELVQ(
-        hparams,
-        prototype_initializer=pt.components.Ones(2, scale=3),
-    )
-
-    # Compute intermediate input and output sizes
-    model.example_input_array = torch.zeros(4, 2)
-
-    # Summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisGLVQ2D(train_ds)
-    pruning = pt.models.PruneLoserPrototypes(
-        threshold=0.01,  # prune prototype if it wins less than 1%
-        idle_epochs=20,  # pruning too early may cause problems
-        prune_quota_per_epoch=2,  # prune at most 2 prototypes per epoch
-        frequency=1,  # prune every epoch
-        verbose=True,
-    )
-    es = pl.callbacks.EarlyStopping(
-        monitor="train_loss",
-        min_delta=0.001,
-        patience=20,
-        mode="min",
-        verbose=True,
-        check_on_train_epoch_end=True,
-    )
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[
-            vis,
-            pruning,
-            es,
-        ],
-        progress_bar_refresh_rate=0,
-        terminate_on_nan=True,
-        weights_summary="full",
-        accelerator="ddp",
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/glvq_iris.py

@@ -1,56 +0,0 @@
-"""GLVQ example using the Iris dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-from torch.optim.lr_scheduler import ExponentialLR
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    train_ds = pt.datasets.Iris(dims=[0, 2])
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=64)
-
-    # Hyperparameters
-    hparams = dict(
-        distribution={
-            "num_classes": 3,
-            "prototypes_per_class": 4
-        },
-        lr=0.01,
-    )
-
-    # Initialize the model
-    model = pt.models.GLVQ(
-        hparams,
-        optimizer=torch.optim.Adam,
-        prototype_initializer=pt.components.SMI(train_ds),
-        lr_scheduler=ExponentialLR,
-        lr_scheduler_kwargs=dict(gamma=0.99, verbose=False),
-    )
-
-    # Compute intermediate input and output sizes
-    model.example_input_array = torch.zeros(4, 2)
-
-    # Callbacks
-    vis = pt.models.VisGLVQ2D(data=train_ds)
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[vis],
-        weights_summary="full",
-        accelerator="ddp",
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/glvq_spiral.py

@@ -1,78 +0,0 @@
-"""GLVQ example using the spiral dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    train_ds = pt.datasets.Spiral(num_samples=500, noise=0.5)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=256)
-
-    # Hyperparameters
-    num_classes = 2
-    prototypes_per_class = 10
-    hparams = dict(
-        distribution=(num_classes, prototypes_per_class),
-        transfer_function="swish_beta",
-        transfer_beta=10.0,
-        # lr=0.1,
-        proto_lr=0.1,
-        bb_lr=0.1,
-        input_dim=2,
-        latent_dim=2,
-    )
-
-    # Initialize the model
-    model = pt.models.GMLVQ(
-        hparams,
-        optimizer=torch.optim.Adam,
-        prototype_initializer=pt.components.SSI(train_ds, noise=1e-2),
-    )
-
-    # Callbacks
-    vis = pt.models.VisGLVQ2D(
-        train_ds,
-        show_last_only=False,
-        block=False,
-    )
-    pruning = pt.models.PruneLoserPrototypes(
-        threshold=0.02,
-        idle_epochs=10,
-        prune_quota_per_epoch=5,
-        frequency=2,
-        replace=True,
-        initializer=pt.components.SSI(train_ds, noise=1e-2),
-        verbose=True,
-    )
-    es = pl.callbacks.EarlyStopping(
-        monitor="train_loss",
-        min_delta=1.0,
-        patience=5,
-        mode="min",
-        check_on_train_epoch_end=True,
-    )
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[
-            vis,
-            # es,
-            pruning,
-        ],
-        terminate_on_nan=True,
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/gmlvq_iris.py

@@ -1,59 +1,144 @@
-"""GLVQ example using the Iris dataset."""
+import logging
 
-import argparse
-
-import prototorch as pt
 import pytorch_lightning as pl
-import torch
+import torchmetrics
-from torch.optim.lr_scheduler import ExponentialLR
+from prototorch.core import SMCI, PCALinearTransformInitializer
+from prototorch.datasets import Iris
+from prototorch.models.architectures.base import Steps
+from prototorch.models.callbacks import (
+    LogTorchmetricCallback,
+    PlotLambdaMatrixToTensorboard,
+    VisGMLVQ2D,
+)
+from prototorch.models.library.gmlvq import GMLVQ
+from pytorch_lightning.callbacks import EarlyStopping
+from torch.utils.data import DataLoader, random_split
 
-if __name__ == "__main__":
+logging.basicConfig(level=logging.INFO)
-    # Command-line arguments
+
-    parser = argparse.ArgumentParser()
+# ##############################################################################
-    parser = pl.Trainer.add_argparse_args(parser)
+
-    args = parser.parse_args()
+
+def main():
+    # ------------------------------------------------------------
+    # DATA
+    # ------------------------------------------------------------
 
     # Dataset
-    train_ds = pt.datasets.Iris()
+    full_dataset = Iris()
+    full_count = len(full_dataset)
 
-    # Dataloaders
+    train_count = int(full_count * 0.5)
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=64)
+    val_count = int(full_count * 0.4)
+    test_count = int(full_count * 0.1)
 
-    # Hyperparameters
+    train_dataset, val_dataset, test_dataset = random_split(
-    hparams = dict(
+        full_dataset, (train_count, val_count, test_count))
+
+    # Dataloader
+    train_loader = DataLoader(
+        train_dataset,
+        batch_size=1,
+        num_workers=4,
+        shuffle=True,
+    )
+    val_loader = DataLoader(
+        val_dataset,
+        batch_size=1,
+        num_workers=4,
+        shuffle=False,
+    )
+    test_loader = DataLoader(
+        test_dataset,
+        batch_size=1,
+        num_workers=0,
+        shuffle=False,
+    )
+
+    # ------------------------------------------------------------
+    # HYPERPARAMETERS
+    # ------------------------------------------------------------
+
+    # Select Initializer
+    components_initializer = SMCI(full_dataset)
+
+    # Define Hyperparameters
+    hyperparameters = GMLVQ.HyperParameters(
+        lr=dict(components_layer=0.1, _omega=0),
         input_dim=4,
-        latent_dim=3,
+        distribution=dict(
-        distribution={
+            num_classes=3,
-            "num_classes": 3,
+            per_class=1,
-            "prototypes_per_class": 2
+        ),
-        },
+        component_initializer=components_initializer,
-        proto_lr=0.0005,
+        omega_initializer=PCALinearTransformInitializer,
-        bb_lr=0.0005,
+        omega_initializer_kwargs=dict(
+            data=train_dataset.dataset[train_dataset.indices][0]))
+
+    # Create Model
+    model = GMLVQ(hyperparameters)
+
+    # ------------------------------------------------------------
+    # TRAINING
+    # ------------------------------------------------------------
+
+    # Controlling Callbacks
+    recall = LogTorchmetricCallback(
+        'training_recall',
+        torchmetrics.Recall,
+        num_classes=3,
+        step=Steps.TRAINING,
     )
 
-    # Initialize the model
+    stopping_criterion = LogTorchmetricCallback(
-    model = pt.models.GMLVQ(
+        'validation_recall',
-        hparams,
+        torchmetrics.Recall,
-        optimizer=torch.optim.Adam,
+        num_classes=3,
-        prototype_initializer=pt.components.SSI(train_ds),
+        step=Steps.VALIDATION,
-        lr_scheduler=ExponentialLR,
-        lr_scheduler_kwargs=dict(gamma=0.99, verbose=False),
-        omega_initializer=pt.components.PCA(train_ds.data)
     )
 
-    # Compute intermediate input and output sizes
+    accuracy = LogTorchmetricCallback(
-    #model.example_input_array = torch.zeros(4, 2)
+        'validation_accuracy',
-
+        torchmetrics.Accuracy,
-    # Callbacks
+        num_classes=3,
-    vis = pt.models.VisGMLVQ2D(data=train_ds, border=0.1)
+        step=Steps.VALIDATION,
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[vis],
-        weights_summary="full",
-        accelerator="ddp",
     )
 
-    # Training loop
+    es = EarlyStopping(
-    trainer.fit(model, train_loader)
+        monitor=stopping_criterion.name,
+        mode="max",
+        patience=10,
+    )
+
+    # Visualization Callback
+    vis = VisGMLVQ2D(data=full_dataset)
+
+    # Define trainer
+    trainer = pl.Trainer(
+        callbacks=[
+            vis,
+            recall,
+            accuracy,
+            stopping_criterion,
+            es,
+            PlotLambdaMatrixToTensorboard(),
+        ],
+        max_epochs=100,
+    )
+
+    # Train
+    trainer.fit(model, train_loader, val_loader)
+    trainer.test(model, test_loader)
+
+    # Manual save
+    trainer.save_checkpoint("./y_arch.ckpt")
+
+    # Load saved model
+    new_model = GMLVQ.load_from_checkpoint(
+        checkpoint_path="./y_arch.ckpt",
+        strict=True,
+    )
+
+
+if __name__ == "__main__":
+    main()

examples/gmlvq_mnist.py

@@ -1,102 +0,0 @@
-"""GMLVQ example using the MNIST dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-from torchvision import transforms
-from torchvision.datasets import MNIST
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    train_ds = MNIST(
-        "~/datasets",
-        train=True,
-        download=True,
-        transform=transforms.Compose([
-            transforms.ToTensor(),
-        ]),
-    )
-    test_ds = MNIST(
-        "~/datasets",
-        train=False,
-        download=True,
-        transform=transforms.Compose([
-            transforms.ToTensor(),
-        ]),
-    )
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds,
-                                               num_workers=0,
-                                               batch_size=256)
-    test_loader = torch.utils.data.DataLoader(test_ds,
-                                              num_workers=0,
-                                              batch_size=256)
-
-    # Hyperparameters
-    num_classes = 10
-    prototypes_per_class = 10
-    hparams = dict(
-        input_dim=28 * 28,
-        latent_dim=28 * 28,
-        distribution=(num_classes, prototypes_per_class),
-        proto_lr=0.01,
-        bb_lr=0.01,
-    )
-
-    # Initialize the model
-    model = pt.models.ImageGMLVQ(
-        hparams,
-        optimizer=torch.optim.Adam,
-        prototype_initializer=pt.components.SMI(train_ds),
-    )
-
-    # Callbacks
-    vis = pt.models.VisImgComp(
-        data=train_ds,
-        num_columns=10,
-        show=False,
-        tensorboard=True,
-        random_data=100,
-        add_embedding=True,
-        embedding_data=200,
-        flatten_data=False,
-    )
-    pruning = pt.models.PruneLoserPrototypes(
-        threshold=0.01,
-        idle_epochs=1,
-        prune_quota_per_epoch=10,
-        frequency=1,
-        verbose=True,
-    )
-    es = pl.callbacks.EarlyStopping(
-        monitor="train_loss",
-        min_delta=0.001,
-        patience=15,
-        mode="min",
-        check_on_train_epoch_end=True,
-    )
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[
-            vis,
-            pruning,
-            # es,
-        ],
-        terminate_on_nan=True,
-        weights_summary=None,
-        accelerator="ddp",
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/gng_iris.py

@@ -1,54 +0,0 @@
-"""Growing Neural Gas example using the Iris dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Reproducibility
-    pl.utilities.seed.seed_everything(seed=42)
-
-    # Prepare the data
-    train_ds = pt.datasets.Iris(dims=[0, 2])
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=64)
-
-    # Hyperparameters
-    hparams = dict(
-        num_prototypes=5,
-        input_dim=2,
-        lr=0.1,
-    )
-
-    # Initialize the model
-    model = pt.models.GrowingNeuralGas(
-        hparams,
-        prototype_initializer=pt.components.Zeros(2),
-    )
-
-    # Compute intermediate input and output sizes
-    model.example_input_array = torch.zeros(4, 2)
-
-    # Model summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisNG2D(data=train_loader)
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        max_epochs=100,
-        callbacks=[vis],
-        weights_summary="full",
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/knn_iris.py

@@ -1,58 +0,0 @@
-"""k-NN example using the Iris dataset from scikit-learn."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-from sklearn.datasets import load_iris
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    x_train, y_train = load_iris(return_X_y=True)
-    x_train = x_train[:, [0, 2]]
-    train_ds = pt.datasets.NumpyDataset(x_train, y_train)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=150)
-
-    # Hyperparameters
-    hparams = dict(k=5)
-
-    # Initialize the model
-    model = pt.models.KNN(hparams, data=train_ds)
-
-    # Compute intermediate input and output sizes
-    model.example_input_array = torch.zeros(4, 2)
-
-    # Summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisGLVQ2D(
-        data=(x_train, y_train),
-        resolution=200,
-        block=True,
-    )
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        max_epochs=1,
-        callbacks=[vis],
-        weights_summary="full",
-    )
-
-    # Training loop
-    # This is only for visualization. k-NN has no training phase.
-    trainer.fit(model, train_loader)
-
-    # Recall
-    y_pred = model.predict(torch.tensor(x_train))
-    print(y_pred)

examples/ksom_colors.py

@@ -1,117 +0,0 @@
-"""Kohonen Self Organizing Map."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-from matplotlib import pyplot as plt
-
-import prototorch as pt
-
-
-def hex_to_rgb(hex_values):
-    for v in hex_values:
-        v = v.lstrip('#')
-        lv = len(v)
-        c = [int(v[i:i + lv // 3], 16) for i in range(0, lv, lv // 3)]
-        yield c
-
-
-def rgb_to_hex(rgb_values):
-    for v in rgb_values:
-        c = "%02x%02x%02x" % tuple(v)
-        yield c
-
-
-class Vis2DColorSOM(pl.Callback):
-    def __init__(self, data, title="ColorSOMe", pause_time=0.1):
-        super().__init__()
-        self.title = title
-        self.fig = plt.figure(self.title)
-        self.data = data
-        self.pause_time = pause_time
-
-    def on_epoch_end(self, trainer, pl_module):
-        ax = self.fig.gca()
-        ax.cla()
-        ax.set_title(self.title)
-        h, w = pl_module._grid.shape[:2]
-        protos = pl_module.prototypes.view(h, w, 3)
-        ax.imshow(protos)
-        ax.axis("off")
-
-        # Overlay color names
-        d = pl_module.compute_distances(self.data)
-        wp = pl_module.predict_from_distances(d)
-        for i, iloc in enumerate(wp):
-            plt.text(iloc[1],
-                     iloc[0],
-                     cnames[i],
-                     ha="center",
-                     va="center",
-                     bbox=dict(facecolor="white", alpha=0.5, lw=0))
-
-        if trainer.current_epoch != trainer.max_epochs - 1:
-            plt.pause(self.pause_time)
-        else:
-            plt.show(block=True)
-
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Reproducibility
-    pl.utilities.seed.seed_everything(seed=42)
-
-    # Prepare the data
-    hex_colors = [
-        "#000000", "#0000ff", "#00007f", "#1f86ff", "#5466aa", "#997fff",
-        "#00ff00", "#ff0000", "#00ffff", "#ff00ff", "#ffff00", "#ffffff",
-        "#545454", "#7f7f7f", "#a8a8a8", "#808000", "#800080", "#ffa500"
-    ]
-    cnames = [
-        "black", "blue", "darkblue", "skyblue", "greyblue", "lilac", "green",
-        "red", "cyan", "magenta", "yellow", "white", "darkgrey", "mediumgrey",
-        "lightgrey", "olive", "purple", "orange"
-    ]
-    colors = list(hex_to_rgb(hex_colors))
-    data = torch.Tensor(colors) / 255.0
-    train_ds = torch.utils.data.TensorDataset(data)
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=8)
-
-    # Hyperparameters
-    hparams = dict(
-        shape=(18, 32),
-        alpha=1.0,
-        sigma=16,
-        lr=0.1,
-    )
-
-    # Initialize the model
-    model = pt.models.KohonenSOM(
-        hparams,
-        prototype_initializer=pt.components.Random(3),
-    )
-
-    # Compute intermediate input and output sizes
-    model.example_input_array = torch.zeros(4, 3)
-
-    # Model summary
-    print(model)
-
-    # Callbacks
-    vis = Vis2DColorSOM(data=data)
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        max_epochs=500,
-        callbacks=[vis],
-        weights_summary="full",
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/lgmlvq_moons.py

@@ -1,67 +0,0 @@
-"""Localized-GMLVQ example using the Moons dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    train_ds = pt.datasets.Moons(num_samples=300, noise=0.2, seed=42)
-
-    # Reproducibility
-    pl.utilities.seed.seed_everything(seed=2)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds,
-                                               batch_size=256,
-                                               shuffle=True)
-
-    # Hyperparameters
-    hparams = dict(
-        distribution=[1, 3],
-        input_dim=2,
-        latent_dim=2,
-    )
-
-    # Initialize the model
-    model = pt.models.LGMLVQ(hparams,
-                             prototype_initializer=pt.components.SMI(train_ds))
-
-    # Compute intermediate input and output sizes
-    model.example_input_array = torch.zeros(4, 2)
-
-    # Summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisGLVQ2D(data=train_ds)
-    es = pl.callbacks.EarlyStopping(
-        monitor="train_acc",
-        min_delta=0.001,
-        patience=20,
-        mode="max",
-        verbose=False,
-        check_on_train_epoch_end=True,
-    )
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[
-            vis,
-            es,
-        ],
-        weights_summary="full",
-        accelerator="ddp",
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/liramlvq_tecator.py

@@ -1,90 +0,0 @@
-"""Limited Rank Matrix LVQ example using the Tecator dataset."""
-
-import argparse
-
-import matplotlib.pyplot as plt
-import pytorch_lightning as pl
-import torch
-
-import prototorch as pt
-
-
-def plot_matrix(matrix):
-    title = "Lambda matrix"
-    plt.figure(title)
-    plt.title(title)
-    plt.imshow(matrix, cmap="gray")
-    plt.axis("off")
-    plt.colorbar()
-    plt.show(block=True)
-
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    train_ds = pt.datasets.Tecator(root="~/datasets/", train=True)
-    test_ds = pt.datasets.Tecator(root="~/datasets/", train=False)
-
-    # Reproducibility
-    pl.utilities.seed.seed_everything(seed=10)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=32)
-    test_loader = torch.utils.data.DataLoader(test_ds, batch_size=32)
-
-    # Hyperparameters
-    hparams = dict(
-        distribution={
-            "num_classes": 2,
-            "prototypes_per_class": 1
-        },
-        input_dim=100,
-        latent_dim=2,
-        proto_lr=0.0001,
-        bb_lr=0.0001,
-    )
-
-    # Initialize the model
-    model = pt.models.SiameseGMLVQ(
-        hparams,
-        # optimizer=torch.optim.SGD,
-        optimizer=torch.optim.Adam,
-        prototype_initializer=pt.components.SMI(train_ds),
-    )
-
-    # Summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisSiameseGLVQ2D(train_ds, border=0.1)
-    es = pl.callbacks.EarlyStopping(monitor="val_loss",
-                                    min_delta=0.001,
-                                    patience=50,
-                                    verbose=False,
-                                    mode="min")
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[vis, es],
-        weights_summary=None,
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader, test_loader)
-
-    # Save the model
-    torch.save(model, "liramlvq_tecator.pt")
-
-    # Load a saved model
-    saved_model = torch.load("liramlvq_tecator.pt")
-
-    # Display the Lambda matrix
-    plot_matrix(saved_model.lambda_matrix)
-
-    # Testing
-    trainer.test(model, test_dataloaders=test_loader)

examples/lvqmln_iris.py

@@ -1,78 +0,0 @@
-"""LVQMLN example using all four dimensions of the Iris dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-
-import prototorch as pt
-
-
-class Backbone(torch.nn.Module):
-    def __init__(self, input_size=4, hidden_size=10, latent_size=2):
-        super().__init__()
-        self.input_size = input_size
-        self.hidden_size = hidden_size
-        self.latent_size = latent_size
-        self.dense1 = torch.nn.Linear(self.input_size, self.hidden_size)
-        self.dense2 = torch.nn.Linear(self.hidden_size, self.latent_size)
-        self.activation = torch.nn.Sigmoid()
-
-    def forward(self, x):
-        x = self.activation(self.dense1(x))
-        out = self.activation(self.dense2(x))
-        return out
-
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    train_ds = pt.datasets.Iris()
-
-    # Reproducibility
-    pl.utilities.seed.seed_everything(seed=42)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=150)
-
-    # Hyperparameters
-    hparams = dict(
-        distribution=[1, 2, 2],
-        proto_lr=0.001,
-        bb_lr=0.001,
-    )
-
-    # Initialize the backbone
-    backbone = Backbone()
-
-    # Initialize the model
-    model = pt.models.LVQMLN(
-        hparams,
-        prototype_initializer=pt.components.SSI(train_ds, transform=backbone),
-        backbone=backbone,
-    )
-
-    # Model summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisSiameseGLVQ2D(
-        data=train_ds,
-        map_protos=False,
-        border=0.1,
-        resolution=500,
-        axis_off=True,
-    )
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[vis],
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/ng_iris.py

@@ -1,63 +0,0 @@
-"""Neural Gas example using the Iris dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-from sklearn.datasets import load_iris
-from sklearn.preprocessing import StandardScaler
-from torch.optim.lr_scheduler import ExponentialLR
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Prepare and pre-process the dataset
-    x_train, y_train = load_iris(return_X_y=True)
-    x_train = x_train[:, [0, 2]]
-    scaler = StandardScaler()
-    scaler.fit(x_train)
-    x_train = scaler.transform(x_train)
-
-    train_ds = pt.datasets.NumpyDataset(x_train, y_train)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=150)
-
-    # Hyperparameters
-    hparams = dict(
-        num_prototypes=30,
-        input_dim=2,
-        lr=0.03,
-    )
-
-    # Initialize the model
-    model = pt.models.NeuralGas(
-        hparams,
-        prototype_initializer=pt.components.Zeros(2),
-        lr_scheduler=ExponentialLR,
-        lr_scheduler_kwargs=dict(gamma=0.99, verbose=False),
-    )
-
-    # Compute intermediate input and output sizes
-    model.example_input_array = torch.zeros(4, 2)
-
-    # Model summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisNG2D(data=train_ds)
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[vis],
-        weights_summary="full",
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/rslvq_iris.py

@@ -1,65 +0,0 @@
-"""RSLVQ example using the Iris dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-from torchvision.transforms import Lambda
-
-import prototorch as pt
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Reproducibility
-    pl.utilities.seed.seed_everything(seed=42)
-
-    # Dataset
-    train_ds = pt.datasets.Iris(dims=[0, 2])
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=64)
-
-    # Hyperparameters
-    hparams = dict(
-        distribution=[2, 2, 3],
-        proto_lr=0.05,
-        lambd=0.1,
-        input_dim=2,
-        latent_dim=2,
-        bb_lr=0.01,
-    )
-
-    # Initialize the model
-    model = pt.models.probabilistic.PLVQ(
-        hparams,
-        optimizer=torch.optim.Adam,
-        # prototype_initializer=pt.components.SMI(train_ds),
-        prototype_initializer=pt.components.SSI(train_ds, noise=0.2),
-        # prototype_initializer=pt.components.Zeros(2),
-        # prototype_initializer=pt.components.Ones(2, scale=2.0),
-    )
-
-    # Compute intermediate input and output sizes
-    model.example_input_array = torch.zeros(4, 2)
-
-    # Summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisSiameseGLVQ2D(data=train_ds)
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[vis],
-        terminate_on_nan=True,
-        weights_summary="full",
-        accelerator="ddp",
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

examples/siamese_glvq_iris.py

@@ -1,73 +0,0 @@
-"""Siamese GLVQ example using all four dimensions of the Iris dataset."""
-
-import argparse
-
-import pytorch_lightning as pl
-import torch
-
-import prototorch as pt
-
-
-class Backbone(torch.nn.Module):
-    def __init__(self, input_size=4, hidden_size=10, latent_size=2):
-        super().__init__()
-        self.input_size = input_size
-        self.hidden_size = hidden_size
-        self.latent_size = latent_size
-        self.dense1 = torch.nn.Linear(self.input_size, self.hidden_size)
-        self.dense2 = torch.nn.Linear(self.hidden_size, self.latent_size)
-        self.activation = torch.nn.Sigmoid()
-
-    def forward(self, x):
-        x = self.activation(self.dense1(x))
-        out = self.activation(self.dense2(x))
-        return out
-
-
-if __name__ == "__main__":
-    # Command-line arguments
-    parser = argparse.ArgumentParser()
-    parser = pl.Trainer.add_argparse_args(parser)
-    args = parser.parse_args()
-
-    # Dataset
-    train_ds = pt.datasets.Iris()
-
-    # Reproducibility
-    pl.utilities.seed.seed_everything(seed=2)
-
-    # Dataloaders
-    train_loader = torch.utils.data.DataLoader(train_ds, batch_size=150)
-
-    # Hyperparameters
-    hparams = dict(
-        distribution=[1, 2, 3],
-        proto_lr=0.01,
-        bb_lr=0.01,
-    )
-
-    # Initialize the backbone
-    backbone = Backbone()
-
-    # Initialize the model
-    model = pt.models.SiameseGLVQ(
-        hparams,
-        prototype_initializer=pt.components.SMI(train_ds),
-        backbone=backbone,
-        both_path_gradients=False,
-    )
-
-    # Model summary
-    print(model)
-
-    # Callbacks
-    vis = pt.models.VisSiameseGLVQ2D(data=train_ds, border=0.1)
-
-    # Setup trainer
-    trainer = pl.Trainer.from_argparse_args(
-        args,
-        callbacks=[vis],
-    )
-
-    # Training loop
-    trainer.fit(model, train_loader)

prototorch/models/__init__.py

@@ -1,15 +1,25 @@
-"""`models` plugin for the `prototorch` package."""
+from .architectures.base import BaseYArchitecture
+from .architectures.comparison import (
+    OmegaComparisonMixin,
+    SimpleComparisonMixin,
+)
+from .architectures.competition import WTACompetitionMixin
+from .architectures.components import SupervisedArchitecture
+from .architectures.loss import GLVQLossMixin
+from .architectures.optimization import (
+    MultipleLearningRateMixin,
+    SingleLearningRateMixin,
+)
 
-from importlib.metadata import PackageNotFoundError, version
+__all__ = [
+    'BaseYArchitecture',
+    "OmegaComparisonMixin",
+    "SimpleComparisonMixin",
+    "SingleLearningRateMixin",
+    "MultipleLearningRateMixin",
+    "SupervisedArchitecture",
+    "WTACompetitionMixin",
+    "GLVQLossMixin",
+]
 
-from .callbacks import PrototypeConvergence, PruneLoserPrototypes
+__version__ = "1.0.0-a8"
-from .cbc import CBC, ImageCBC
-from .glvq import (GLVQ, GLVQ1, GLVQ21, GMLVQ, GRLVQ, LGMLVQ, LVQMLN,
-                   ImageGLVQ, ImageGMLVQ, SiameseGLVQ, SiameseGMLVQ)
-from .knn import KNN
-from .lvq import LVQ1, LVQ21, MedianLVQ
-from .probabilistic import CELVQ, PLVQ, RSLVQ, SLVQ
-from .unsupervised import GrowingNeuralGas, HeskesSOM, KohonenSOM, NeuralGas
-from .vis import *
-
-__version__ = "0.1.8"

prototorch/models/abstract.py

@@ -1,190 +0,0 @@
-"""Abstract classes to be inherited by prototorch models."""
-
-from typing import Final, final
-
-import pytorch_lightning as pl
-import torch
-import torchmetrics
-from prototorch.components import Components, LabeledComponents
-from prototorch.functions.distances import euclidean_distance
-from prototorch.modules import WTAC, LambdaLayer
-
-
-class ProtoTorchMixin(object):
-    pass
-
-
-class ProtoTorchBolt(pl.LightningModule):
-    """All ProtoTorch models are ProtoTorch Bolts."""
-    def __repr__(self):
-        surep = super().__repr__()
-        indented = "".join([f"\t{line}\n" for line in surep.splitlines()])
-        wrapped = f"ProtoTorch Bolt(\n{indented})"
-        return wrapped
-
-
-class PrototypeModel(ProtoTorchBolt):
-    def __init__(self, hparams, **kwargs):
-        super().__init__()
-
-        # Hyperparameters
-        self.save_hyperparameters(hparams)
-
-        # Default hparams
-        self.hparams.setdefault("lr", 0.01)
-
-        # Default config
-        self.optimizer = kwargs.get("optimizer", torch.optim.Adam)
-        self.lr_scheduler = kwargs.get("lr_scheduler", None)
-        self.lr_scheduler_kwargs = kwargs.get("lr_scheduler_kwargs", dict())
-
-        distance_fn = kwargs.get("distance_fn", euclidean_distance)
-        self.distance_layer = LambdaLayer(distance_fn)
-
-    @property
-    def num_prototypes(self):
-        return len(self.proto_layer.components)
-
-    @property
-    def prototypes(self):
-        return self.proto_layer.components.detach().cpu()
-
-    @property
-    def components(self):
-        """Only an alias for the prototypes."""
-        return self.prototypes
-
-    def configure_optimizers(self):
-        optimizer = self.optimizer(self.parameters(), lr=self.hparams.lr)
-        if self.lr_scheduler is not None:
-            scheduler = self.lr_scheduler(optimizer,
-                                          **self.lr_scheduler_kwargs)
-            sch = {
-                "scheduler": scheduler,
-                "interval": "step",
-            }  # called after each training step
-            return [optimizer], [sch]
-        else:
-            return optimizer
-
-    @final
-    def reconfigure_optimizers(self):
-        self.trainer.accelerator_backend.setup_optimizers(self.trainer)
-
-    def add_prototypes(self, *args, **kwargs):
-        self.proto_layer.add_components(*args, **kwargs)
-        self.reconfigure_optimizers()
-
-    def remove_prototypes(self, indices):
-        self.proto_layer.remove_components(indices)
-        self.reconfigure_optimizers()
-
-
-class UnsupervisedPrototypeModel(PrototypeModel):
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Layers
-        prototype_initializer = kwargs.get("prototype_initializer", None)
-        initialized_prototypes = kwargs.get("initialized_prototypes", None)
-        if prototype_initializer is not None or initialized_prototypes is not None:
-            self.proto_layer = Components(
-                self.hparams.num_prototypes,
-                initializer=prototype_initializer,
-                initialized_components=initialized_prototypes,
-            )
-
-    def compute_distances(self, x):
-        protos = self.proto_layer()
-        distances = self.distance_layer(x, protos)
-        return distances
-
-    def forward(self, x):
-        distances = self.compute_distances(x)
-        return distances
-
-
-class SupervisedPrototypeModel(PrototypeModel):
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Layers
-        prototype_initializer = kwargs.get("prototype_initializer", None)
-        initialized_prototypes = kwargs.get("initialized_prototypes", None)
-        if prototype_initializer is not None or initialized_prototypes is not None:
-            self.proto_layer = LabeledComponents(
-                distribution=self.hparams.distribution,
-                initializer=prototype_initializer,
-                initialized_components=initialized_prototypes,
-            )
-        self.competition_layer = WTAC()
-
-    @property
-    def prototype_labels(self):
-        return self.proto_layer.component_labels.detach().cpu()
-
-    @property
-    def num_classes(self):
-        return len(self.proto_layer.distribution)
-
-    def compute_distances(self, x):
-        protos, _ = self.proto_layer()
-        distances = self.distance_layer(x, protos)
-        return distances
-
-    def forward(self, x):
-        distances = self.compute_distances(x)
-        y_pred = self.predict_from_distances(distances)
-        # TODO
-        y_pred = torch.eye(self.num_classes, device=self.device)[
-            y_pred.long()]  # depends on labels {0,...,num_classes}
-        return y_pred
-
-    def predict_from_distances(self, distances):
-        with torch.no_grad():
-            plabels = self.proto_layer.component_labels
-            y_pred = self.competition_layer(distances, plabels)
-        return y_pred
-
-    def predict(self, x):
-        with torch.no_grad():
-            distances = self.compute_distances(x)
-        y_pred = self.predict_from_distances(distances)
-        return y_pred
-
-    def log_acc(self, distances, targets, tag):
-        preds = self.predict_from_distances(distances)
-        accuracy = torchmetrics.functional.accuracy(preds.int(), targets.int())
-        # `.int()` because FloatTensors are assumed to be class probabilities
-
-        self.log(tag,
-                 accuracy,
-                 on_step=False,
-                 on_epoch=True,
-                 prog_bar=True,
-                 logger=True)
-
-
-class NonGradientMixin(ProtoTorchMixin):
-    """Mixin for custom non-gradient optimization."""
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.automatic_optimization: Final = False
-
-    def training_step(self, train_batch, batch_idx, optimizer_idx=None):
-        raise NotImplementedError
-
-
-class ImagePrototypesMixin(ProtoTorchMixin):
-    """Mixin for models with image prototypes."""
-    @final
-    def on_train_batch_end(self, outputs, batch, batch_idx, dataloader_idx):
-        """Constrain the components to the range [0, 1] by clamping after updates."""
-        self.proto_layer.components.data.clamp_(0.0, 1.0)
-
-    def get_prototype_grid(self, num_columns=2, return_channels_last=True):
-        from torchvision.utils import make_grid
-        grid = make_grid(self.components, nrow=num_columns)
-        if return_channels_last:
-            grid = grid.permute((1, 2, 0))
-        return grid.cpu()

prototorch/models/architectures/base.py

@@ -0,0 +1,290 @@
+"""
+Proto Y Architecture
+
+Network architecture for Component based Learning.
+"""
+from __future__ import annotations
+
+from dataclasses import asdict, dataclass
+from typing import Any, Callable
+
+import pytorch_lightning as pl
+import torch
+from torchmetrics import Metric
+
+
+class Steps(enumerate):
+    TRAINING = "training"
+    VALIDATION = "validation"
+    TEST = "test"
+    PREDICT = "predict"
+
+
+class BaseYArchitecture(pl.LightningModule):
+
+    @dataclass
+    class HyperParameters:
+        """
+        Add all hyperparameters in the inherited class.
+        """
+        ...
+
+    # Fields
+    registered_metrics: dict[str, dict[type[Metric], Metric]] = {
+        Steps.TRAINING: {},
+        Steps.VALIDATION: {},
+        Steps.TEST: {},
+    }
+    registered_metric_callbacks: dict[str, dict[type[Metric],
+                                                set[Callable]]] = {
+                                                    Steps.TRAINING: {},
+                                                    Steps.VALIDATION: {},
+                                                    Steps.TEST: {},
+                                                }
+
+    # Type Hints for Necessary Fields
+    components_layer: torch.nn.Module
+
+    def __init__(self, hparams) -> None:
+        if isinstance(hparams, dict):
+            self.save_hyperparameters(hparams)
+            # TODO: => Move into Component Child
+            del hparams["initialized_proto_shape"]
+            hparams = self.HyperParameters(**hparams)
+        else:
+            hparams_dict = asdict(hparams)
+            hparams_dict["component_initializer"] = None
+            self.save_hyperparameters(hparams_dict, )
+
+        super().__init__()
+
+        # Common Steps
+        self.init_components(hparams)
+        self.init_backbone(hparams)
+        self.init_comparison(hparams)
+        self.init_competition(hparams)
+
+        # Train Steps
+        self.init_loss(hparams)
+
+        # Inference Steps
+        self.init_inference(hparams)
+
+    # external API
+    def get_competition(self, batch, components):
+        '''
+        Returns the output of the competition layer.
+        '''
+        latent_batch, latent_components = self.backbone(batch, components)
+        # TODO: => Latent Hook
+        comparison_tensor = self.comparison(latent_batch, latent_components)
+        # TODO: => Comparison Hook
+        return comparison_tensor
+
+    def forward(self, batch):
+        '''
+        Returns the prediction.
+        '''
+        if isinstance(batch, torch.Tensor):
+            batch = (batch, None)
+        # TODO: manage different datatypes?
+        components = self.components_layer()
+        # TODO: => Component Hook
+        comparison_tensor = self.get_competition(batch, components)
+        # TODO: => Competition Hook
+        return self.inference(comparison_tensor, components)
+
+    def predict(self, batch):
+        """
+        Alias for forward
+        """
+        return self.forward(batch)
+
+    def forward_comparison(self, batch):
+        '''
+        Returns the Output of the comparison layer.
+        '''
+        if isinstance(batch, torch.Tensor):
+            batch = (batch, None)
+        # TODO: manage different datatypes?
+        components = self.components_layer()
+        # TODO: => Component Hook
+        return self.get_competition(batch, components)
+
+    def loss_forward(self, batch):
+        '''
+        Returns the output of the loss layer.
+        '''
+        # TODO: manage different datatypes?
+        components = self.components_layer()
+        # TODO: => Component Hook
+        comparison_tensor = self.get_competition(batch, components)
+        # TODO: => Competition Hook
+        return self.loss(comparison_tensor, batch, components)
+
+    # Empty Initialization
+    def init_components(self, hparams: HyperParameters) -> None:
+        """
+        All initialization necessary for the components step.
+        """
+
+    def init_backbone(self, hparams: HyperParameters) -> None:
+        """
+        All initialization necessary for the backbone step.
+        """
+
+    def init_comparison(self, hparams: HyperParameters) -> None:
+        """
+        All initialization necessary for the comparison step.
+        """
+
+    def init_competition(self, hparams: HyperParameters) -> None:
+        """
+        All initialization necessary for the competition step.
+        """
+
+    def init_loss(self, hparams: HyperParameters) -> None:
+        """
+        All initialization necessary for the loss step.
+        """
+
+    def init_inference(self, hparams: HyperParameters) -> None:
+        """
+        All initialization necessary for the inference step.
+        """
+
+    # Empty Steps
+    def components(self):
+        """
+        This step has no input.
+
+        It returns the components.
+        """
+        raise NotImplementedError(
+            "The components step has no reasonable default.")
+
+    def backbone(self, batch, components):
+        """
+        The backbone step receives the data batch and the components.
+        It can transform both by an arbitrary function.
+
+        It returns the transformed batch and components,
+        each of the same length as the original input.
+        """
+        return batch, components
+
+    def comparison(self, batch, components):
+        """
+        Takes a batch of size N and the component set of size M.
+
+        It returns an NxMxD tensor containing D (usually 1) pairwise comparison measures.
+        """
+        raise NotImplementedError(
+            "The comparison step has no reasonable default.")
+
+    def competition(self, comparison_measures, components):
+        """
+        Takes the tensor of comparison measures.
+
+        Assigns a competition vector to each class.
+        """
+        raise NotImplementedError(
+            "The competition step has no reasonable default.")
+
+    def loss(self, comparison_measures, batch, components):
+        """
+        Takes the tensor of competition measures.
+
+        Calculates a single loss value
+        """
+        raise NotImplementedError("The loss step has no reasonable default.")
+
+    def inference(self, comparison_measures, components):
+        """
+        Takes the tensor of competition measures.
+
+        Returns the inferred vector.
+        """
+        raise NotImplementedError(
+            "The inference step has no reasonable default.")
+
+    # Y Architecture Hooks
+
+    # internal API, called by models and callbacks
+    def register_torchmetric(
+        self,
+        name: Callable,
+        metric: type[Metric],
+        step: str = Steps.TRAINING,
+        **metric_kwargs,
+    ):
+        '''
+        Register a callback for evaluating a torchmetric.
+        '''
+        if step == Steps.PREDICT:
+            raise ValueError("Prediction metrics are not supported.")
+
+        if metric not in self.registered_metrics:
+            self.registered_metrics[step][metric] = metric(**metric_kwargs)
+            self.registered_metric_callbacks[step][metric] = {name}
+        else:
+            self.registered_metric_callbacks[step][metric].add(name)
+
+    def update_metrics_step(self, batch, step):
+        # Prediction Metrics
+        preds = self(batch)
+
+        _, y = batch
+        for metric in self.registered_metrics[step]:
+            instance = self.registered_metrics[step][metric].to(self.device)
+            instance(y, preds.reshape(y.shape))
+
+    def update_metrics_epoch(self, step):
+        for metric in self.registered_metrics[step]:
+            instance = self.registered_metrics[step][metric].to(self.device)
+            value = instance.compute()
+
+            for callback in self.registered_metric_callbacks[step][metric]:
+                callback(value, self)
+
+            instance.reset()
+
+    # Lightning steps
+    # -------------------------------------------------------------------------
+    # >>>> Training
+    def training_step(self, batch, batch_idx, optimizer_idx=None):
+        self.update_metrics_step(batch, Steps.TRAINING)
+
+        return self.loss_forward(batch)
+
+    def training_epoch_end(self, outputs) -> None:
+        self.update_metrics_epoch(Steps.TRAINING)
+
+    # >>>> Validation
+    def validation_step(self, batch, batch_idx):
+        self.update_metrics_step(batch, Steps.VALIDATION)
+
+        return self.loss_forward(batch)
+
+    def validation_epoch_end(self, outputs) -> None:
+        self.update_metrics_epoch(Steps.VALIDATION)
+
+    # >>>> Test
+    def test_step(self, batch, batch_idx):
+        self.update_metrics_step(batch, Steps.TEST)
+        return self.loss_forward(batch)
+
+    def test_epoch_end(self, outputs) -> None:
+        self.update_metrics_epoch(Steps.TEST)
+
+    # >>>> Prediction
+    def predict_step(self, batch, batch_idx, dataloader_idx=0):
+        return self.predict(batch)
+
+    # Check points
+    def on_save_checkpoint(self, checkpoint: dict[str, Any]) -> None:
+        # Compatible with Lightning
+        checkpoint["hyper_parameters"] = {
+            'hparams': checkpoint["hyper_parameters"]
+        }
+        return super().on_save_checkpoint(checkpoint)

prototorch/models/architectures/comparison.py

@@ -0,0 +1,148 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Callable
+
+import torch
+from prototorch.core.distances import euclidean_distance
+from prototorch.core.initializers import (
+    AbstractLinearTransformInitializer,
+    EyeLinearTransformInitializer,
+)
+from prototorch.models.architectures.base import BaseYArchitecture
+from prototorch.nn.wrappers import LambdaLayer
+from torch import Tensor
+from torch.nn.parameter import Parameter
+
+
+class SimpleComparisonMixin(BaseYArchitecture):
+    """
+    Simple Comparison
+
+    A comparison layer that only uses the positions of the components
+    and the batch for dissimilarity computation.
+    """
+
+    # HyperParameters
+    # ----------------------------------------------------------------------------------------------
+    @dataclass
+    class HyperParameters(BaseYArchitecture.HyperParameters):
+        """
+        comparison_fn: The comparison / dissimilarity function to use. Default: euclidean_distance.
+        comparison_args: Keyword arguments for the comparison function. Default: {}.
+        """
+        comparison_fn: Callable = euclidean_distance
+        comparison_args: dict = field(default_factory=dict)
+
+        comparison_parameters: dict = field(default_factory=dict)
+
+    # Steps
+    # ----------------------------------------------------------------------------------------------
+    def init_comparison(self, hparams: HyperParameters):
+        self.comparison_layer = LambdaLayer(
+            fn=hparams.comparison_fn,
+            **hparams.comparison_args,
+        )
+
+        self.comparison_kwargs: dict[str, Tensor] = {}
+
+    def comparison(self, batch, components):
+        comp_tensor, _ = components
+        batch_tensor, _ = batch
+
+        comp_tensor = comp_tensor.unsqueeze(1)
+
+        distances = self.comparison_layer(
+            batch_tensor,
+            comp_tensor,
+            **self.comparison_kwargs,
+        )
+
+        return distances
+
+
+class OmegaComparisonMixin(SimpleComparisonMixin):
+    """
+    Omega Comparison
+
+    A comparison layer that uses the positions of the components
+    and the batch for dissimilarity computation.
+    """
+
+    _omega: torch.Tensor
+
+    # HyperParameters
+    # ----------------------------------------------------------------------------------------------
+    @dataclass
+    class HyperParameters(SimpleComparisonMixin.HyperParameters):
+        """
+        input_dim: Necessary Field: The dimensionality of the input.
+        latent_dim:
+            The dimensionality of the latent space. Default: 2.
+        omega_initializer:
+            The initializer to use for the omega matrix. Default: EyeLinearTransformInitializer.
+        """
+        input_dim: int | None = None
+        latent_dim: int = 2
+        omega_initializer: type[
+            AbstractLinearTransformInitializer] = EyeLinearTransformInitializer
+        omega_initializer_kwargs: dict = field(default_factory=dict)
+
+    # Steps
+    # ----------------------------------------------------------------------------------------------
+    def init_comparison(self, hparams: HyperParameters) -> None:
+        super().init_comparison(hparams)
+
+        # Initialize the omega matrix
+        if hparams.input_dim is None:
+            raise ValueError("input_dim must be specified.")
+        else:
+            omega = hparams.omega_initializer(
+                **hparams.omega_initializer_kwargs).generate(
+                    hparams.input_dim,
+                    hparams.latent_dim,
+                )
+            self.register_parameter("_omega", Parameter(omega))
+            self.comparison_kwargs = dict(omega=self._omega)
+
+    # Properties
+    # ----------------------------------------------------------------------------------------------
+    @property
+    def omega_matrix(self):
+        '''
+        Omega Matrix. Mapping applied to data and prototypes.
+        '''
+        return self._omega.detach().cpu()
+
+    @property
+    def lambda_matrix(self):
+        '''
+        Lambda Matrix.
+        '''
+        omega = self._omega.detach()
+        lam = omega @ omega.T
+        return lam.detach().cpu()
+
+    @property
+    def relevance_profile(self):
+        '''
+        Relevance Profile. Main Diagonal of the Lambda Matrix.
+        '''
+        return self.lambda_matrix.diag().abs()
+
+    @property
+    def classification_influence_profile(self):
+        '''
+        Classification Influence Profile. Influence of each dimension.
+        '''
+        lam = self.lambda_matrix
+        return lam.abs().sum(0)
+
+    @property
+    def parameter_omega(self):
+        return self._omega
+
+    @parameter_omega.setter
+    def parameter_omega(self, new_omega):
+        with torch.no_grad():
+            self._omega.data.copy_(new_omega)

prototorch/models/architectures/competition.py

@@ -0,0 +1,29 @@
+from dataclasses import dataclass
+
+from prototorch.core.competitions import WTAC
+from prototorch.models.architectures.base import BaseYArchitecture
+
+
+class WTACompetitionMixin(BaseYArchitecture):
+    """
+    Winner Take All Competition
+
+    A competition layer that uses the winner-take-all strategy.
+    """
+
+    # HyperParameters
+    # ----------------------------------------------------------------------------------------------------
+    @dataclass
+    class HyperParameters(BaseYArchitecture.HyperParameters):
+        """
+        No hyperparameters.
+        """
+
+    # Steps
+    # ----------------------------------------------------------------------------------------------------
+    def init_inference(self, hparams: HyperParameters):
+        self.competition_layer = WTAC()
+
+    def inference(self, comparison_measures, components):
+        comp_labels = components[1]
+        return self.competition_layer(comparison_measures, comp_labels)

prototorch/models/architectures/components.py

@@ -0,0 +1,64 @@
+from dataclasses import dataclass
+
+from prototorch.core.components import LabeledComponents
+from prototorch.core.initializers import (
+    AbstractComponentsInitializer,
+    LabelsInitializer,
+    ZerosCompInitializer,
+)
+from prototorch.models import BaseYArchitecture
+
+
+class SupervisedArchitecture(BaseYArchitecture):
+    """
+    Supervised Architecture
+
+    An architecture that uses labeled Components as component Layer.
+    """
+    components_layer: LabeledComponents
+
+    # HyperParameters
+    # ----------------------------------------------------------------------------------------------------
+    @dataclass
+    class HyperParameters:
+        """
+        distribution: A valid prototype distribution. No default possible.
+        components_initializer: An implementation of AbstractComponentsInitializer. No default possible.
+        """
+        distribution: "dict[str, int]"
+        component_initializer: AbstractComponentsInitializer
+
+    # Steps
+    # ----------------------------------------------------------------------------------------------------
+    def init_components(self, hparams: HyperParameters):
+        if hparams.component_initializer is not None:
+            self.components_layer = LabeledComponents(
+                distribution=hparams.distribution,
+                components_initializer=hparams.component_initializer,
+                labels_initializer=LabelsInitializer(),
+            )
+            proto_shape = self.components_layer.components.shape[1:]
+            self.hparams["initialized_proto_shape"] = proto_shape
+        else:
+            # when restoring a checkpointed model
+            self.components_layer = LabeledComponents(
+                distribution=hparams.distribution,
+                components_initializer=ZerosCompInitializer(
+                    self.hparams["initialized_proto_shape"]),
+            )
+
+    # Properties
+    # ----------------------------------------------------------------------------------------------------
+    @property
+    def prototypes(self):
+        """
+        Returns the position of the prototypes.
+        """
+        return self.components_layer.components.detach().cpu()
+
+    @property
+    def prototype_labels(self):
+        """
+        Returns the labels of the prototypes.
+        """
+        return self.components_layer.labels.detach().cpu()

prototorch/models/architectures/loss.py

@@ -0,0 +1,42 @@
+from dataclasses import dataclass, field
+
+from prototorch.core.losses import GLVQLoss
+from prototorch.models.architectures.base import BaseYArchitecture
+
+
+class GLVQLossMixin(BaseYArchitecture):
+    """
+    GLVQ Loss
+
+    A loss layer that uses the Generalized Learning Vector Quantization (GLVQ) loss.
+    """
+
+    # HyperParameters
+    # ----------------------------------------------------------------------------------------------------
+    @dataclass
+    class HyperParameters(BaseYArchitecture.HyperParameters):
+        """
+        margin: The margin of the GLVQ loss. Default: 0.0.
+        transfer_fn: Transfer function to use. Default: sigmoid_beta.
+        transfer_args: Keyword arguments for the transfer function. Default: {beta: 10.0}.
+        """
+        margin: float = 0.0
+
+        transfer_fn: str = "sigmoid_beta"
+        transfer_args: dict = field(default_factory=lambda: dict(beta=10.0))
+
+    # Steps
+    # ----------------------------------------------------------------------------------------------------
+    def init_loss(self, hparams: HyperParameters):
+        self.loss_layer = GLVQLoss(
+            margin=hparams.margin,
+            transfer_fn=hparams.transfer_fn,
+            **hparams.transfer_args,
+        )
+
+    def loss(self, comparison_measures, batch, components):
+        target = batch[1]
+        comp_labels = components[1]
+        loss = self.loss_layer(comparison_measures, target, comp_labels)
+        self.log('loss', loss)
+        return loss

prototorch/models/architectures/optimization.py

@@ -0,0 +1,73 @@
+from dataclasses import dataclass, field
+from typing import Type
+
+import torch
+from prototorch.models import BaseYArchitecture
+from torch.nn.parameter import Parameter
+
+
+class SingleLearningRateMixin(BaseYArchitecture):
+    """
+    Single Learning Rate
+
+    All parameters are updated with a single learning rate.
+    """
+
+    # HyperParameters
+    # ----------------------------------------------------------------------------------------------------
+    @dataclass
+    class HyperParameters(BaseYArchitecture.HyperParameters):
+        """
+        lr: The learning rate. Default: 0.1.
+        optimizer: The optimizer to use. Default: torch.optim.Adam.
+        """
+        lr: float = 0.1
+        optimizer: Type[torch.optim.Optimizer] = torch.optim.Adam
+
+    # Hooks
+    # ----------------------------------------------------------------------------------------------------
+    def configure_optimizers(self):
+        return self.hparams.optimizer(self.parameters(),
+                                      lr=self.hparams.lr)  # type: ignore
+
+
+class MultipleLearningRateMixin(BaseYArchitecture):
+    """
+    Multiple Learning Rates
+
+    Define Different Learning Rates for different parameters.
+    """
+
+    # HyperParameters
+    # ----------------------------------------------------------------------------------------------------
+    @dataclass
+    class HyperParameters(BaseYArchitecture.HyperParameters):
+        """
+        lr: The learning rate. Default: 0.1.
+        optimizer: The optimizer to use. Default: torch.optim.Adam.
+        """
+        lr: dict = field(default_factory=dict)
+        optimizer: Type[torch.optim.Optimizer] = torch.optim.Adam
+
+    # Hooks
+    # ----------------------------------------------------------------------------------------------------
+    def configure_optimizers(self):
+        optimizers = []
+        for name, lr in self.hparams.lr.items():
+            if not hasattr(self, name):
+                raise ValueError(f"{name} is not a parameter of {self}")
+            else:
+                model_part = getattr(self, name)
+                if isinstance(model_part, Parameter):
+                    optimizers.append(
+                        self.hparams.optimizer(
+                            [model_part],
+                            lr=lr,  # type: ignore
+                        ))
+                elif hasattr(model_part, "parameters"):
+                    optimizers.append(
+                        self.hparams.optimizer(
+                            model_part.parameters(),
+                            lr=lr,  # type: ignore
+                        ))
+        return optimizers

prototorch/models/callbacks.py

@@ -1,134 +1,307 @@
-"""Lightning Callbacks."""
-
 import logging
+import warnings
+from enum import Enum
+from typing import Optional, Type
 
+import matplotlib.pyplot as plt
+import numpy as np
 import pytorch_lightning as pl
 import torch
-from prototorch.components import Components
+import torchmetrics
+from prototorch.models.architectures.base import BaseYArchitecture, Steps
+from prototorch.models.architectures.comparison import OmegaComparisonMixin
+from prototorch.models.library.gmlvq import GMLVQ
+from prototorch.models.vis import Vis2DAbstract
+from prototorch.utils.utils import mesh2d
+from pytorch_lightning.loggers import TensorBoardLogger
 
-from .extras import ConnectionTopology
+DIVERGING_COLOR_MAPS = [
+    'PiYG',
+    'PRGn',
+    'BrBG',
+    'PuOr',
+    'RdGy',
+    'RdBu',
+    'RdYlBu',
+    'RdYlGn',
+    'Spectral',
+    'coolwarm',
+    'bwr',
+    'seismic',
+]
 
 
-class PruneLoserPrototypes(pl.Callback):
+class LogTorchmetricCallback(pl.Callback):
-    def __init__(self,
-                 threshold=0.01,
-                 idle_epochs=10,
-                 prune_quota_per_epoch=-1,
-                 frequency=1,
-                 replace=False,
-                 initializer=None,
-                 verbose=False):
-        self.threshold = threshold  # minimum win ratio
-        self.idle_epochs = idle_epochs  # epochs to wait before pruning
-        self.prune_quota_per_epoch = prune_quota_per_epoch
-        self.frequency = frequency
-        self.replace = replace
-        self.verbose = verbose
-        self.initializer = initializer
 
-    def on_epoch_end(self, trainer, pl_module):
+    def __init__(
-        if (trainer.current_epoch + 1) < self.idle_epochs:
+        self,
-            return None
+        name,
-        if (trainer.current_epoch + 1) % self.frequency:
+        metric: Type[torchmetrics.Metric],
-            return None
+        step: str = Steps.TRAINING,
+        on_epoch=True,
+        **metric_kwargs,
+    ) -> None:
+        self.name = name
+        self.metric = metric
+        self.metric_kwargs = metric_kwargs
+        self.step = step
+        self.on_epoch = on_epoch
 
-        ratios = pl_module.prototype_win_ratios.mean(dim=0)
+    def setup(
-        to_prune = torch.arange(len(ratios))[ratios < self.threshold]
+        self,
-        to_prune = to_prune.tolist()
+        trainer: pl.Trainer,
-        prune_labels = pl_module.prototype_labels[to_prune]
+        pl_module: BaseYArchitecture,
-        if self.prune_quota_per_epoch > 0:
+        stage: Optional[str] = None,
-            to_prune = to_prune[:self.prune_quota_per_epoch]
+    ) -> None:
-            prune_labels = prune_labels[:self.prune_quota_per_epoch]
+        pl_module.register_torchmetric(
+            self,
+            self.metric,
+            step=self.step,
+            **self.metric_kwargs,
+        )
 
-        if len(to_prune) > 0:
+    def __call__(self, value, pl_module: BaseYArchitecture):
-            if self.verbose:
+        pl_module.log(
-                print(f"\nPrototype win ratios: {ratios}")
+            self.name,
-                print(f"Pruning prototypes at: {to_prune}")
+            value,
-                print(f"Corresponding labels are: {prune_labels.tolist()}")
+            on_epoch=self.on_epoch,
-            cur_num_protos = pl_module.num_prototypes
+            on_step=(not self.on_epoch),
-            pl_module.remove_prototypes(indices=to_prune)
+        )
-            if self.replace:
-                labels, counts = torch.unique(prune_labels,
-                                              sorted=True,
-                                              return_counts=True)
-                distribution = dict(zip(labels.tolist(), counts.tolist()))
-                if self.verbose:
-                    print(f"Re-adding pruned prototypes...")
-                    print(f"{distribution=}")
-                pl_module.add_prototypes(distribution=distribution,
-                                         initializer=self.initializer)
-            new_num_protos = pl_module.num_prototypes
-            if self.verbose:
-                print(f"`num_prototypes` changed from {cur_num_protos} "
-                      f"to {new_num_protos}.")
-        return True
 
 
-class PrototypeConvergence(pl.Callback):
+class LogConfusionMatrix(LogTorchmetricCallback):
-    def __init__(self, min_delta=0.01, idle_epochs=10, verbose=False):
-        self.min_delta = min_delta
-        self.idle_epochs = idle_epochs  # epochs to wait
-        self.verbose = verbose
 
-    def on_epoch_end(self, trainer, pl_module):
+    def __init__(
-        if (trainer.current_epoch + 1) < self.idle_epochs:
+        self,
-            return None
+        num_classes,
-        if self.verbose:
+        name="confusion",
-            print("Stopping...")
+        on='prediction',
-        # TODO
+        **kwargs,
-        return True
+    ):
+        super().__init__(
+            name,
+            torchmetrics.ConfusionMatrix,
+            on=on,
+            num_classes=num_classes,
+            **kwargs,
+        )
+
+    def __call__(self, value, pl_module: BaseYArchitecture):
+        fig, ax = plt.subplots()
+        ax.imshow(value.detach().cpu().numpy())
+
+        # Show all ticks and label them with the respective list entries
+        # ax.set_xticks(np.arange(len(farmers)), labels=farmers)
+        # ax.set_yticks(np.arange(len(vegetables)), labels=vegetables)
+
+        # Rotate the tick labels and set their alignment.
+        plt.setp(
+            ax.get_xticklabels(),
+            rotation=45,
+            ha="right",
+            rotation_mode="anchor",
+        )
+
+        # Loop over data dimensions and create text annotations.
+        for i in range(len(value)):
+            for j in range(len(value)):
+                text = ax.text(
+                    j,
+                    i,
+                    value[i, j].item(),
+                    ha="center",
+                    va="center",
+                    color="w",
+                )
+
+        ax.set_title(self.name)
+        fig.tight_layout()
+
+        pl_module.logger.experiment.add_figure(
+            tag=self.name,
+            figure=fig,
+            close=True,
+            global_step=pl_module.global_step,
+        )
 
 
-class GNGCallback(pl.Callback):
+class VisGLVQ2D(Vis2DAbstract):
-    """GNG Callback.
 
-    Applies growing algorithm based on accumulated error and topology.
+    def visualize(self, pl_module):
+        protos = pl_module.prototypes
+        plabels = pl_module.prototype_labels
+        x_train, y_train = self.x_train, self.y_train
+        ax = self.setup_ax()
+        self.plot_protos(ax, protos, plabels)
+        if x_train is not None:
+            self.plot_data(ax, x_train, y_train)
+            mesh_input, xx, yy = mesh2d(
+                np.vstack([x_train, protos]),
+                self.border,
+                self.resolution,
+            )
+        else:
+            mesh_input, xx, yy = mesh2d(protos, self.border, self.resolution)
+        _components = pl_module.components_layer.components
+        mesh_input = torch.from_numpy(mesh_input).type_as(_components)
+        y_pred = pl_module.predict(mesh_input)
+        y_pred = y_pred.cpu().reshape(xx.shape)
+        ax.contourf(xx, yy, y_pred, cmap=self.cmap, alpha=0.35)
 
-    Based on "A Growing Neural Gas Network Learns Topologies" by Bernd Fritzke.
 
-    """
+class VisGMLVQ2D(Vis2DAbstract):
-    def __init__(self, reduction=0.1, freq=10):
-        self.reduction = reduction
-        self.freq = freq
 
-    def on_epoch_end(self, trainer: pl.Trainer, pl_module):
+    def __init__(self, *args, ev_proj=True, **kwargs):
-        if (trainer.current_epoch + 1) % self.freq == 0:
+        super().__init__(*args, **kwargs)
-            # Get information
+        self.ev_proj = ev_proj
-            errors = pl_module.errors
-            topology: ConnectionTopology = pl_module.topology_layer
-            components: Components = pl_module.proto_layer.components
 
-            # Insertion point
+    def visualize(self, pl_module):
-            worst = torch.argmax(errors)
+        protos = pl_module.prototypes
+        plabels = pl_module.prototype_labels
+        x_train, y_train = self.x_train, self.y_train
+        device = pl_module.device
+        omega = pl_module._omega.detach()
+        lam = omega @ omega.T
+        u, _, _ = torch.pca_lowrank(lam, q=2)
+        with torch.no_grad():
+            x_train = torch.Tensor(x_train).to(device)
+            x_train = x_train @ u
+            x_train = x_train.cpu().detach()
+        if self.show_protos:
+            with torch.no_grad():
+                protos = torch.Tensor(protos).to(device)
+                protos = protos @ u
+                protos = protos.cpu().detach()
+        ax = self.setup_ax()
+        self.plot_data(ax, x_train, y_train)
+        if self.show_protos:
+            self.plot_protos(ax, protos, plabels)
 
-            neighbors = topology.get_neighbors(worst)[0]
 
-            if len(neighbors) == 0:
+class PlotLambdaMatrixToTensorboard(pl.Callback):
-                logging.log(level=20, msg="No neighbor-pairs found!")
-                return
 
-            neighbors_errors = errors[neighbors]
+    def __init__(self, cmap='seismic') -> None:
-            worst_neighbor = neighbors[torch.argmax(neighbors_errors)]
+        super().__init__()
+        self.cmap = cmap
 
-            # New Prototype
+        if self.cmap not in DIVERGING_COLOR_MAPS and type(self.cmap) is str:
-            new_component = 0.5 * (components[worst] +
+            warnings.warn(
-                                   components[worst_neighbor])
+                f"{self.cmap} is not a diverging color map. We recommend to use one of the following: {DIVERGING_COLOR_MAPS}"
+            )
 
-            # Add component
+    def on_train_start(self, trainer, pl_module: GMLVQ):
-            pl_module.proto_layer.add_components(
+        self.plot_lambda(trainer, pl_module)
-                initialized_components=new_component.unsqueeze(0))
 
-            # Adjust Topology
+    def on_train_epoch_end(self, trainer, pl_module: GMLVQ):
-            topology.add_prototype()
+        self.plot_lambda(trainer, pl_module)
-            topology.add_connection(worst, -1)
-            topology.add_connection(worst_neighbor, -1)
-            topology.remove_connection(worst, worst_neighbor)
 
-            # New errors
+    def plot_lambda(self, trainer, pl_module: GMLVQ):
-            worst_error = errors[worst].unsqueeze(0)
-            pl_module.errors = torch.cat([pl_module.errors, worst_error])
-            pl_module.errors[worst] = errors[worst] * self.reduction
-            pl_module.errors[
-                worst_neighbor] = errors[worst_neighbor] * self.reduction
 
-            trainer.accelerator_backend.setup_optimizers(trainer)
+        self.fig, self.ax = plt.subplots(1, 1)
+
+        # plot lambda matrix
+        l_matrix = pl_module.lambda_matrix
+
+        # normalize lambda matrix
+        l_matrix = l_matrix / torch.max(torch.abs(l_matrix))
+
+        # plot lambda matrix
+        self.ax.imshow(l_matrix.detach().numpy(), self.cmap, vmin=-1, vmax=1)
+
+        self.fig.colorbar(self.ax.images[-1])
+
+        # add title
+        self.ax.set_title('Lambda Matrix')
+
+        # add to tensorboard
+        if isinstance(trainer.logger, TensorBoardLogger):
+            trainer.logger.experiment.add_figure(
+                "lambda_matrix",
+                self.fig,
+                trainer.global_step,
+            )
+        else:
+            warnings.warn(
+                f"{self.__class__.__name__} is not compatible with {trainer.logger.__class__.__name__} as logger. Use TensorBoardLogger instead."
+            )
+
+
+class Profiles(Enum):
+    '''
+    Available Profiles
+    '''
+    RELEVANCE = 'relevance'
+    INFLUENCE = 'influence'
+
+    def __str__(self):
+        return str(self.value)
+
+
+class PlotMatrixProfiles(pl.Callback):
+
+    def __init__(self, profile=Profiles.INFLUENCE, cmap='seismic') -> None:
+        super().__init__()
+        self.cmap = cmap
+        self.profile = profile
+
+    def on_train_start(self, trainer, pl_module: GMLVQ):
+        '''
+        Plot initial profile.
+        '''
+        self._plot_profile(trainer, pl_module)
+
+    def on_train_epoch_end(self, trainer, pl_module: GMLVQ):
+        '''
+        Plot after every epoch.
+        '''
+        self._plot_profile(trainer, pl_module)
+
+    def _plot_profile(self, trainer, pl_module: GMLVQ):
+
+        fig, ax = plt.subplots(1, 1)
+
+        # plot lambda matrix
+        l_matrix = torch.abs(pl_module.lambda_matrix)
+
+        if self.profile == Profiles.RELEVANCE:
+            profile_value = l_matrix.diag()
+        elif self.profile == Profiles.INFLUENCE:
+            profile_value = l_matrix.sum(0)
+
+        # plot lambda matrix
+        ax.plot(profile_value.detach().numpy())
+
+        # add title
+        ax.set_title(f'{self.profile} profile')
+
+        # add to tensorboard
+        if isinstance(trainer.logger, TensorBoardLogger):
+            trainer.logger.experiment.add_figure(
+                f"{self.profile}_matrix",
+                fig,
+                trainer.global_step,
+            )
+        else:
+            class_name = self.__class__.__name__
+            logger_name = trainer.logger.__class__.__name__
+            warnings.warn(
+                f"{class_name} is not compatible with {logger_name} as logger. Use TensorBoardLogger instead."
+            )
+
+
+class OmegaTraceNormalization(pl.Callback):
+    '''
+    Trace normalization of the Omega Matrix.
+    '''
+    __epsilon = torch.finfo(torch.float32).eps
+
+    def on_train_epoch_end(self, trainer: "pl.Trainer",
+                           pl_module: OmegaComparisonMixin) -> None:
+
+        omega = pl_module.parameter_omega
+        denominator = torch.sqrt(torch.trace(omega.T @ omega))
+        logging.debug(
+            "Apply Omega Trace Normalization: demoninator=%f",
+            denominator.item(),
+        )
+        pl_module.parameter_omega = omega / (denominator + self.__epsilon)

prototorch/models/cbc.py

@@ -1,76 +0,0 @@
-import torch
-import torchmetrics
-
-from .abstract import ImagePrototypesMixin
-from .extras import (CosineSimilarity, MarginLoss, ReasoningLayer,
-                     euclidean_similarity, rescaled_cosine_similarity,
-                     shift_activation)
-from .glvq import SiameseGLVQ
-
-
-class CBC(SiameseGLVQ):
-    """Classification-By-Components."""
-    def __init__(self, hparams, margin=0.1, **kwargs):
-        super().__init__(hparams, **kwargs)
-        self.margin = margin
-        self.similarity_fn = kwargs.get("similarity_fn", euclidean_similarity)
-        num_components = self.components.shape[0]
-        self.reasoning_layer = ReasoningLayer(num_components=num_components,
-                                              num_classes=self.num_classes)
-        self.component_layer = self.proto_layer
-
-    @property
-    def components(self):
-        return self.prototypes
-
-    @property
-    def reasonings(self):
-        return self.reasoning_layer.reasonings.cpu()
-
-    def forward(self, x):
-        components, _ = self.component_layer()
-        latent_x = self.backbone(x)
-        self.backbone.requires_grad_(self.both_path_gradients)
-        latent_components = self.backbone(components)
-        self.backbone.requires_grad_(True)
-        detections = self.similarity_fn(latent_x, latent_components)
-        probs = self.reasoning_layer(detections)
-        return probs
-
-    def shared_step(self, batch, batch_idx, optimizer_idx=None):
-        x, y = batch
-        # x = x.view(x.size(0), -1)
-        y_pred = self(x)
-        num_classes = self.reasoning_layer.num_classes
-        y_true = torch.nn.functional.one_hot(y.long(), num_classes=num_classes)
-        loss = MarginLoss(self.margin)(y_pred, y_true).mean(dim=0)
-        return y_pred, loss
-
-    def training_step(self, batch, batch_idx, optimizer_idx=None):
-        y_pred, train_loss = self.shared_step(batch, batch_idx, optimizer_idx)
-        preds = torch.argmax(y_pred, dim=1)
-        accuracy = torchmetrics.functional.accuracy(preds.int(),
-                                                    batch[1].int())
-        self.log("train_acc",
-                 accuracy,
-                 on_step=False,
-                 on_epoch=True,
-                 prog_bar=True,
-                 logger=True)
-        return train_loss
-
-    def predict(self, x):
-        with torch.no_grad():
-            y_pred = self(x)
-            y_pred = torch.argmax(y_pred, dim=1)
-        return y_pred
-
-
-class ImageCBC(ImagePrototypesMixin, CBC):
-    """CBC model that constrains the components to the range [0, 1] by
-    clamping after updates.
-    """
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-        # Namespace hook
-        self.proto_layer = self.component_layer

prototorch/models/data.py

@@ -1,124 +0,0 @@
-"""Prototorch Data Modules
-
-This allows to store the used dataset inside a Lightning Module.
-Mainly used for PytorchLightningCLI configurations.
-"""
-from typing import Any, Optional, Type
-
-import pytorch_lightning as pl
-from torch.utils.data import DataLoader, Dataset, random_split
-from torchvision import transforms
-from torchvision.datasets import MNIST
-
-import prototorch as pt
-
-
-# MNIST
-class MNISTDataModule(pl.LightningDataModule):
-    def __init__(self, batch_size=32):
-        super().__init__()
-        self.batch_size = batch_size
-
-    # Download mnist dataset as side-effect, only called on the first cpu
-    def prepare_data(self):
-        MNIST("~/datasets", train=True, download=True)
-        MNIST("~/datasets", train=False, download=True)
-
-    # called for every GPU/machine (assigning state is OK)
-    def setup(self, stage=None):
-        # Transforms
-        transform = transforms.Compose([
-            transforms.ToTensor(),
-        ])
-        # Split dataset
-        if stage in (None, "fit"):
-            mnist_train = MNIST("~/datasets", train=True, transform=transform)
-            self.mnist_train, self.mnist_val = random_split(
-                mnist_train,
-                [55000, 5000],
-            )
-        if stage == (None, "test"):
-            self.mnist_test = MNIST(
-                "~/datasets",
-                train=False,
-                transform=transform,
-            )
-
-    # Dataloaders
-    def train_dataloader(self):
-        mnist_train = DataLoader(self.mnist_train, batch_size=self.batch_size)
-        return mnist_train
-
-    def val_dataloader(self):
-        mnist_val = DataLoader(self.mnist_val, batch_size=self.batch_size)
-        return mnist_val
-
-    def test_dataloader(self):
-        mnist_test = DataLoader(self.mnist_test, batch_size=self.batch_size)
-        return mnist_test
-
-
-# def train_on_mnist(batch_size=256) -> type:
-#     class DataClass(pl.LightningModule):
-#         datamodule = MNISTDataModule(batch_size=batch_size)
-
-#         def __init__(self, *args, **kwargs):
-#             prototype_initializer = kwargs.pop(
-#                 "prototype_initializer", pt.components.Zeros((28, 28, 1)))
-#             super().__init__(*args,
-#                              prototype_initializer=prototype_initializer,
-#                              **kwargs)
-
-#     dc: Type[DataClass] = DataClass
-#     return dc
-
-
-# ABSTRACT
-class GeneralDataModule(pl.LightningDataModule):
-    def __init__(self, dataset: Dataset, batch_size: int = 32) -> None:
-        super().__init__()
-        self.train_dataset = dataset
-        self.batch_size = batch_size
-
-    def train_dataloader(self) -> DataLoader:
-        return DataLoader(self.train_dataset, batch_size=self.batch_size)
-
-
-# def train_on_dataset(dataset: Dataset, batch_size: int = 256):
-#     class DataClass(pl.LightningModule):
-#         datamodule = GeneralDataModule(dataset, batch_size)
-#         datashape = dataset[0][0].shape
-#         example_input_array = torch.zeros_like(dataset[0][0]).unsqueeze(0)
-
-#         def __init__(self, *args: Any, **kwargs: Any) -> None:
-#             prototype_initializer = kwargs.pop(
-#                 "prototype_initializer",
-#                 pt.components.Zeros(self.datashape),
-#             )
-#             super().__init__(*args,
-#                              prototype_initializer=prototype_initializer,
-#                              **kwargs)
-
-#     return DataClass
-
-# if __name__ == "__main__":
-#     from prototorch.models import GLVQ
-
-#     demo_dataset = pt.datasets.Iris()
-
-#     TrainingClass: Type = train_on_dataset(demo_dataset)
-
-#     class DemoGLVQ(TrainingClass, GLVQ):
-#         """Model Definition."""
-
-#     # Hyperparameters
-#     hparams = dict(
-#         distribution={
-#             "num_classes": 3,
-#             "prototypes_per_class": 4
-#         },
-#         lr=0.01,
-#     )
-
-#     initialized = DemoGLVQ(hparams)
-#     print(initialized)

prototorch/models/extras.py

@@ -1,142 +0,0 @@
-"""prototorch.models.extras
-
-Modules not yet available in prototorch go here temporarily.
-
-"""
-
-import torch
-from prototorch.functions.distances import euclidean_distance
-from prototorch.functions.similarities import cosine_similarity
-
-
-def rescaled_cosine_similarity(x, y):
-    """Cosine Similarity rescaled to [0, 1]."""
-    similarities = cosine_similarity(x, y)
-    return (similarities + 1.0) / 2.0
-
-
-def shift_activation(x):
-    return (x + 1.0) / 2.0
-
-
-def euclidean_similarity(x, y, variance=1.0):
-    d = euclidean_distance(x, y)
-    return torch.exp(-(d * d) / (2 * variance))
-
-
-class ConnectionTopology(torch.nn.Module):
-    def __init__(self, agelimit, num_prototypes):
-        super().__init__()
-        self.agelimit = agelimit
-        self.num_prototypes = num_prototypes
-
-        self.cmat = torch.zeros((self.num_prototypes, self.num_prototypes))
-        self.age = torch.zeros_like(self.cmat)
-
-    def forward(self, d):
-        order = torch.argsort(d, dim=1)
-
-        for element in order:
-            i0, i1 = element[0], element[1]
-
-            self.cmat[i0][i1] = 1
-            self.cmat[i1][i0] = 1
-
-            self.age[i0][i1] = 0
-            self.age[i1][i0] = 0
-
-            self.age[i0][self.cmat[i0] == 1] += 1
-            self.age[i1][self.cmat[i1] == 1] += 1
-
-            self.cmat[i0][self.age[i0] > self.agelimit] = 0
-            self.cmat[i1][self.age[i1] > self.agelimit] = 0
-
-    def get_neighbors(self, position):
-        return torch.where(self.cmat[position])
-
-    def add_prototype(self):
-        new_cmat = torch.zeros([dim + 1 for dim in self.cmat.shape])
-        new_cmat[:-1, :-1] = self.cmat
-        self.cmat = new_cmat
-
-        new_age = torch.zeros([dim + 1 for dim in self.age.shape])
-        new_age[:-1, :-1] = self.age
-        self.age = new_age
-
-    def add_connection(self, a, b):
-        self.cmat[a][b] = 1
-        self.cmat[b][a] = 1
-
-        self.age[a][b] = 0
-        self.age[b][a] = 0
-
-    def remove_connection(self, a, b):
-        self.cmat[a][b] = 0
-        self.cmat[b][a] = 0
-
-        self.age[a][b] = 0
-        self.age[b][a] = 0
-
-    def extra_repr(self):
-        return f"(agelimit): ({self.agelimit})"
-
-
-class CosineSimilarity(torch.nn.Module):
-    def __init__(self, activation=shift_activation):
-        super().__init__()
-        self.activation = activation
-
-    def forward(self, x, y):
-        epsilon = torch.finfo(x.dtype).eps
-        normed_x = (x / x.pow(2).sum(dim=tuple(range(
-            1, x.ndim)), keepdim=True).clamp(min=epsilon).sqrt()).flatten(
-                start_dim=1)
-        normed_y = (y / y.pow(2).sum(dim=tuple(range(
-            1, y.ndim)), keepdim=True).clamp(min=epsilon).sqrt()).flatten(
-                start_dim=1)
-        # normed_x = (x / torch.linalg.norm(x, dim=1))
-        diss = torch.inner(normed_x, normed_y)
-        return self.activation(diss)
-
-
-class MarginLoss(torch.nn.modules.loss._Loss):
-    def __init__(self,
-                 margin=0.3,
-                 size_average=None,
-                 reduce=None,
-                 reduction="mean"):
-        super().__init__(size_average, reduce, reduction)
-        self.margin = margin
-
-    def forward(self, input_, target):
-        dp = torch.sum(target * input_, dim=-1)
-        dm = torch.max(input_ - target, dim=-1).values
-        return torch.nn.functional.relu(dm - dp + self.margin)
-
-
-class ReasoningLayer(torch.nn.Module):
-    def __init__(self, num_components, num_classes, num_replicas=1):
-        super().__init__()
-        self.num_replicas = num_replicas
-        self.num_classes = num_classes
-        probabilities_init = torch.zeros(2, 1, num_components,
-                                         self.num_classes)
-        probabilities_init.uniform_(0.4, 0.6)
-        # TODO Use `self.register_parameter("param", Paramater(param))` instead
-        self.reasoning_probabilities = torch.nn.Parameter(probabilities_init)
-
-    @property
-    def reasonings(self):
-        pk = self.reasoning_probabilities[0]
-        nk = (1 - pk) * self.reasoning_probabilities[1]
-        ik = 1 - pk - nk
-        img = torch.cat([pk, nk, ik], dim=0).permute(1, 0, 2)
-        return img.unsqueeze(1)
-
-    def forward(self, detections):
-        pk = self.reasoning_probabilities[0].clamp(0, 1)
-        nk = (1 - pk) * self.reasoning_probabilities[1].clamp(0, 1)
-        numerator = (detections @ (pk - nk)) + nk.sum(1)
-        probs = numerator / (pk + nk).sum(1)
-        probs = probs.squeeze(0)
-        return probs

prototorch/models/glvq.py

@@ -1,333 +0,0 @@
-"""Models based on the GLVQ framework."""
-
-import torch
-from prototorch.functions.activations import get_activation
-from prototorch.functions.competitions import wtac
-from prototorch.functions.distances import (lomega_distance, omega_distance,
-                                            squared_euclidean_distance)
-from prototorch.functions.helper import get_flat
-from prototorch.functions.losses import glvq_loss, lvq1_loss, lvq21_loss
-from prototorch.components import LinearMapping
-from prototorch.modules import LambdaLayer, LossLayer
-from torch.nn.parameter import Parameter
-
-from .abstract import ImagePrototypesMixin, SupervisedPrototypeModel
-
-
-class GLVQ(SupervisedPrototypeModel):
-    """Generalized Learning Vector Quantization."""
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Default hparams
-        self.hparams.setdefault("transfer_fn", "identity")
-        self.hparams.setdefault("transfer_beta", 10.0)
-
-        # Layers
-        transfer_fn = get_activation(self.hparams.transfer_fn)
-        self.transfer_layer = LambdaLayer(transfer_fn)
-
-        # Loss
-        self.loss = LossLayer(glvq_loss)
-
-        # Prototype metrics
-        self.initialize_prototype_win_ratios()
-
-    def initialize_prototype_win_ratios(self):
-        self.register_buffer(
-            "prototype_win_ratios",
-            torch.zeros(self.num_prototypes, device=self.device))
-
-    def on_epoch_start(self):
-        self.initialize_prototype_win_ratios()
-
-    def log_prototype_win_ratios(self, distances):
-        batch_size = len(distances)
-        prototype_wc = torch.zeros(self.num_prototypes,
-                                   dtype=torch.long,
-                                   device=self.device)
-        wi, wc = torch.unique(distances.min(dim=-1).indices,
-                              sorted=True,
-                              return_counts=True)
-        prototype_wc[wi] = wc
-        prototype_wr = prototype_wc / batch_size
-        self.prototype_win_ratios = torch.vstack([
-            self.prototype_win_ratios,
-            prototype_wr,
-        ])
-
-    def shared_step(self, batch, batch_idx, optimizer_idx=None):
-        x, y = batch
-        out = self.compute_distances(x)
-        plabels = self.proto_layer.component_labels
-        mu = self.loss(out, y, prototype_labels=plabels)
-        batch_loss = self.transfer_layer(mu, beta=self.hparams.transfer_beta)
-        loss = batch_loss.sum(dim=0)
-        return out, loss
-
-    def training_step(self, batch, batch_idx, optimizer_idx=None):
-        out, train_loss = self.shared_step(batch, batch_idx, optimizer_idx)
-        self.log_prototype_win_ratios(out)
-        self.log("train_loss", train_loss)
-        self.log_acc(out, batch[-1], tag="train_acc")
-        return train_loss
-
-    def validation_step(self, batch, batch_idx):
-        # `model.eval()` and `torch.no_grad()` handled by pl
-        out, val_loss = self.shared_step(batch, batch_idx)
-        self.log("val_loss", val_loss)
-        self.log_acc(out, batch[-1], tag="val_acc")
-        return val_loss
-
-    def test_step(self, batch, batch_idx):
-        # `model.eval()` and `torch.no_grad()` handled by pl
-        out, test_loss = self.shared_step(batch, batch_idx)
-        self.log_acc(out, batch[-1], tag="test_acc")
-        return test_loss
-
-    def test_epoch_end(self, outputs):
-        test_loss = 0.0
-        for batch_loss in outputs:
-            test_loss += batch_loss.item()
-        self.log("test_loss", test_loss)
-
-    # TODO
-    # def predict_step(self, batch, batch_idx, dataloader_idx=None):
-    #     pass
-
-
-class SiameseGLVQ(GLVQ):
-    """GLVQ in a Siamese setting.
-
-    GLVQ model that applies an arbitrary transformation on the inputs and the
-    prototypes before computing the distances between them. The weights in the
-    transformation pipeline are only learned from the inputs.
-
-    """
-    def __init__(self,
-                 hparams,
-                 backbone=torch.nn.Identity(),
-                 both_path_gradients=False,
-                 **kwargs):
-        distance_fn = kwargs.pop("distance_fn", squared_euclidean_distance)
-        super().__init__(hparams, distance_fn=distance_fn, **kwargs)
-        self.backbone = backbone
-        self.both_path_gradients = both_path_gradients
-
-    def configure_optimizers(self):
-        proto_opt = self.optimizer(self.proto_layer.parameters(),
-                                   lr=self.hparams.proto_lr)
-        # Only add a backbone optimizer if backbone has trainable parameters
-        if (bb_params := list(self.backbone.parameters())):
-            bb_opt = self.optimizer(bb_params, lr=self.hparams.bb_lr)
-            optimizers = [proto_opt, bb_opt]
-        else:
-            optimizers = [proto_opt]
-        if self.lr_scheduler is not None:
-            schedulers = []
-            for optimizer in optimizers:
-                scheduler = self.lr_scheduler(optimizer,
-                                              **self.lr_scheduler_kwargs)
-                schedulers.append(scheduler)
-            return optimizers, schedulers
-        else:
-            return optimizers
-
-    def compute_distances(self, x):
-        protos, _ = self.proto_layer()
-        x, protos = get_flat(x, protos)
-        latent_x = self.backbone(x)
-        self.backbone.requires_grad_(self.both_path_gradients)
-        latent_protos = self.backbone(protos)
-        self.backbone.requires_grad_(True)
-        distances = self.distance_layer(latent_x, latent_protos)
-        return distances
-
-    def predict_latent(self, x, map_protos=True):
-        """Predict `x` assuming it is already embedded in the latent space.
-
-        Only the prototypes are embedded in the latent space using the
-        backbone.
-
-        """
-        self.eval()
-        with torch.no_grad():
-            protos, plabels = self.proto_layer()
-            if map_protos:
-                protos = self.backbone(protos)
-            d = self.distance_layer(x, protos)
-            y_pred = wtac(d, plabels)
-        return y_pred
-
-
-class LVQMLN(SiameseGLVQ):
-    """Learning Vector Quantization Multi-Layer Network.
-
-    GLVQ model that applies an arbitrary transformation on the inputs, BUT NOT
-    on the prototypes before computing the distances between them. This of
-    course, means that the prototypes no longer live the input space, but
-    rather in the embedding space.
-
-    """
-    def compute_distances(self, x):
-        latent_protos, _ = self.proto_layer()
-        latent_x = self.backbone(x)
-        distances = self.distance_layer(latent_x, latent_protos)
-        return distances
-
-
-class GRLVQ(SiameseGLVQ):
-    """Generalized Relevance Learning Vector Quantization.
-
-    Implemented as a Siamese network with a linear transformation backbone.
-
-    TODO Make a RelevanceLayer. `bb_lr` is ignored otherwise.
-
-    """
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Additional parameters
-        relevances = torch.ones(self.hparams.input_dim, device=self.device)
-        self.register_parameter("_relevances", Parameter(relevances))
-
-        # Override the backbone
-        self.backbone = LambdaLayer(lambda x: x @ torch.diag(self._relevances),
-                                    name="relevance scaling")
-
-    @property
-    def relevance_profile(self):
-        return self._relevances.detach().cpu()
-
-    def extra_repr(self):
-        return f"(relevances): (shape: {tuple(self._relevances.shape)})"
-
-
-class SiameseGMLVQ(SiameseGLVQ):
-    """Generalized Matrix Learning Vector Quantization.
-
-    Implemented as a Siamese network with a linear transformation backbone.
-
-    """
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Override the backbone
-        self.backbone = torch.nn.Linear(self.hparams.input_dim,
-                                        self.hparams.latent_dim,
-                                        bias=False)
-
-    @property
-    def omega_matrix(self):
-        return self.backbone.weight.detach().cpu()
-
-    @property
-    def lambda_matrix(self):
-        omega = self.backbone.weight  # (latent_dim, input_dim)
-        lam = omega.T @ omega
-        return lam.detach().cpu()
-
-
-class GMLVQ(GLVQ):
-    """Generalized Matrix Learning Vector Quantization.
-
-    Implemented as a regular GLVQ network that simply uses a different distance
-    function. This makes it easier to implement a localized variant.
-
-    """
-    def __init__(self, hparams, **kwargs):
-        distance_fn = kwargs.pop("distance_fn", omega_distance)
-        super().__init__(hparams, distance_fn=distance_fn, **kwargs)
-
-        # Additional parameters
-        omega_initializer = kwargs.get("omega_initializer", None)
-        initialized_omega = kwargs.get("initialized_omega", None)
-        if omega_initializer is not None or initialized_omega is not None:
-            self.omega_layer = LinearMapping(
-                mapping_shape=(self.hparams.input_dim, self.hparams.latent_dim),
-                initializer=omega_initializer,
-                initialized_linearmapping=initialized_omega,
-            )
-
-        self.register_parameter("_omega", Parameter(self.omega_layer.mapping))
-        self.backbone = LambdaLayer(lambda x: x @ self._omega, name = "omega matrix")
-       
-    @property
-    def omega_matrix(self):
-        return self._omega.detach().cpu()
-
-    def compute_distances(self, x):
-        protos, _ = self.proto_layer()
-        distances = self.distance_layer(x, protos, self._omega)
-        return distances
-
-    def extra_repr(self):
-        return f"(omega): (shape: {tuple(self._omega.shape)})"
-
-    def predict_latent(self, x, map_protos=True):
-        """Predict `x` assuming it is already embedded in the latent space.
-
-        Only the prototypes are embedded in the latent space using the
-        backbone.
- 
-        """
-        self.eval()
-        with torch.no_grad():
-            protos, plabels = self.proto_layer()
-            if map_protos:
-                protos = self.backbone(protos)
-            d = squared_euclidean_distance(x, protos)
-            y_pred = wtac(d, plabels)
-        return y_pred
-
-
-
-
-class LGMLVQ(GMLVQ):
-    """Localized and Generalized Matrix Learning Vector Quantization."""
-    def __init__(self, hparams, **kwargs):
-        distance_fn = kwargs.pop("distance_fn", lomega_distance)
-        super().__init__(hparams, distance_fn=distance_fn, **kwargs)
-
-        # Re-register `_omega` to override the one from the super class.
-        omega = torch.randn(
-            self.num_prototypes,
-            self.hparams.input_dim,
-            self.hparams.latent_dim,
-            device=self.device,
-        )
-        self.register_parameter("_omega", Parameter(omega))
-
-
-class GLVQ1(GLVQ):
-    """Generalized Learning Vector Quantization 1."""
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-        self.loss = LossLayer(lvq1_loss)
-        self.optimizer = torch.optim.SGD
-
-
-class GLVQ21(GLVQ):
-    """Generalized Learning Vector Quantization 2.1."""
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-        self.loss = LossLayer(lvq21_loss)
-        self.optimizer = torch.optim.SGD
-
-
-class ImageGLVQ(ImagePrototypesMixin, GLVQ):
-    """GLVQ for training on image data.
-
-    GLVQ model that constrains the prototypes to the range [0, 1] by clamping
-    after updates.
-
-    """
-
-
-class ImageGMLVQ(ImagePrototypesMixin, GMLVQ):
-    """GMLVQ for training on image data.
-
-    GMLVQ model that constrains the prototypes to the range [0, 1] by clamping
-    after updates.
-
-    """

prototorch/models/knn.py

@@ -1,38 +0,0 @@
-"""ProtoTorch KNN model."""
-
-import warnings
-
-from prototorch.components import LabeledComponents
-from prototorch.modules import KNNC
-
-from .abstract import SupervisedPrototypeModel
-
-
-class KNN(SupervisedPrototypeModel):
-    """K-Nearest-Neighbors classification algorithm."""
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Default hparams
-        self.hparams.setdefault("k", 1)
-
-        data = kwargs.get("data", None)
-        if data is None:
-            raise ValueError("KNN requires data, but was not provided!")
-
-        # Layers
-        self.proto_layer = LabeledComponents(initialized_components=data)
-        self.competition_layer = KNNC(k=self.hparams.k)
-
-    def training_step(self, train_batch, batch_idx, optimizer_idx=None):
-        return 1  # skip training step
-
-    def on_train_batch_start(self,
-                             train_batch,
-                             batch_idx,
-                             dataloader_idx=None):
-        warnings.warn("k-NN has no training, skipping!")
-        return -1
-
-    def configure_optimizers(self):
-        return None

prototorch/models/library/__init__.py

@@ -0,0 +1,7 @@
+from .glvq import GLVQ
+from .gmlvq import GMLVQ
+
+__all__ = [
+    "GLVQ",
+    "GMLVQ",
+]

prototorch/models/library/glvq.py

@@ -0,0 +1,35 @@
+from dataclasses import dataclass
+
+from prototorch.models import (
+    SimpleComparisonMixin,
+    SingleLearningRateMixin,
+    SupervisedArchitecture,
+    WTACompetitionMixin,
+)
+from prototorch.models.architectures.loss import GLVQLossMixin
+
+
+class GLVQ(
+        SupervisedArchitecture,
+        SimpleComparisonMixin,
+        GLVQLossMixin,
+        WTACompetitionMixin,
+        SingleLearningRateMixin,
+):
+    """
+    Generalized Learning Vector Quantization (GLVQ)
+
+    A GLVQ architecture that uses the winner-take-all strategy and the GLVQ loss.
+    """
+
+    @dataclass
+    class HyperParameters(
+            SimpleComparisonMixin.HyperParameters,
+            SingleLearningRateMixin.HyperParameters,
+            GLVQLossMixin.HyperParameters,
+            WTACompetitionMixin.HyperParameters,
+            SupervisedArchitecture.HyperParameters,
+    ):
+        """
+        No hyperparameters.
+        """

prototorch/models/library/gmlvq.py

@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Callable
+
+import torch
+from prototorch.core.distances import omega_distance
+from prototorch.models import (
+    GLVQLossMixin,
+    MultipleLearningRateMixin,
+    OmegaComparisonMixin,
+    SupervisedArchitecture,
+    WTACompetitionMixin,
+)
+
+
+class GMLVQ(
+        SupervisedArchitecture,
+        OmegaComparisonMixin,
+        GLVQLossMixin,
+        WTACompetitionMixin,
+        MultipleLearningRateMixin,
+):
+    """
+    Generalized Matrix Learning Vector Quantization (GMLVQ)
+
+    A GMLVQ architecture that uses the winner-take-all strategy and the GLVQ loss.
+    """
+    # HyperParameters
+    # ----------------------------------------------------------------------------------------------------
+    @dataclass
+    class HyperParameters(
+            MultipleLearningRateMixin.HyperParameters,
+            OmegaComparisonMixin.HyperParameters,
+            GLVQLossMixin.HyperParameters,
+            WTACompetitionMixin.HyperParameters,
+            SupervisedArchitecture.HyperParameters,
+    ):
+        """
+        comparison_fn: The comparison / dissimilarity function to use. Override Default: omega_distance.
+        comparison_args: Keyword arguments for the comparison function. Override Default: {}.
+        """
+        comparison_fn: Callable = omega_distance
+        comparison_args: dict = field(default_factory=dict)
+        optimizer: type[torch.optim.Optimizer] = torch.optim.Adam
+
+        lr: dict = field(default_factory=lambda: dict(
+            components_layer=0.1,
+            _omega=0.5,
+        ))

prototorch/models/lvq.py

@@ -1,68 +0,0 @@
-"""LVQ models that are optimized using non-gradient methods."""
-
-from prototorch.functions.losses import _get_dp_dm
-
-from .abstract import NonGradientMixin
-from .glvq import GLVQ
-
-
-class LVQ1(NonGradientMixin, GLVQ):
-    """Learning Vector Quantization 1."""
-    def training_step(self, train_batch, batch_idx, optimizer_idx=None):
-        protos = self.proto_layer.components
-        plabels = self.proto_layer.component_labels
-
-        x, y = train_batch
-        dis = self.compute_distances(x)
-        # TODO Vectorized implementation
-
-        for xi, yi in zip(x, y):
-            d = self.compute_distances(xi.view(1, -1))
-            preds = self.competition_layer(d, plabels)
-            w = d.argmin(1)
-            if yi == preds:
-                shift = xi - protos[w]
-            else:
-                shift = protos[w] - xi
-            updated_protos = protos + 0.0
-            updated_protos[w] = protos[w] + (self.hparams.lr * shift)
-            self.proto_layer.load_state_dict({"_components": updated_protos},
-                                             strict=False)
-
-        # Logging
-        self.log_acc(dis, y, tag="train_acc")
-
-        return None
-
-
-class LVQ21(NonGradientMixin, GLVQ):
-    """Learning Vector Quantization 2.1."""
-    def training_step(self, train_batch, batch_idx, optimizer_idx=None):
-        protos = self.proto_layer.components
-        plabels = self.proto_layer.component_labels
-
-        x, y = train_batch
-        dis = self.compute_distances(x)
-        # TODO Vectorized implementation
-
-        for xi, yi in zip(x, y):
-            xi = xi.view(1, -1)
-            yi = yi.view(1, )
-            d = self.compute_distances(xi)
-            (_, wp), (_, wn) = _get_dp_dm(d, yi, plabels, with_indices=True)
-            shiftp = xi - protos[wp]
-            shiftn = protos[wn] - xi
-            updated_protos = protos + 0.0
-            updated_protos[wp] = protos[wp] + (self.hparams.lr * shiftp)
-            updated_protos[wn] = protos[wn] + (self.hparams.lr * shiftn)
-            self.proto_layer.load_state_dict({"_components": updated_protos},
-                                             strict=False)
-
-        # Logging
-        self.log_acc(dis, y, tag="train_acc")
-
-        return None
-
-
-class MedianLVQ(NonGradientMixin, GLVQ):
-    """Median LVQ"""

prototorch/models/probabilistic.py

@@ -1,99 +0,0 @@
-"""Probabilistic GLVQ methods"""
-
-import torch
-from prototorch.functions.losses import nllr_loss, rslvq_loss
-from prototorch.functions.pooling import (stratified_min_pooling,
-                                          stratified_sum_pooling)
-from prototorch.functions.transforms import (GaussianPrior,
-                                             RankScaledGaussianPrior)
-from prototorch.modules import LambdaLayer, LossLayer
-
-from .glvq import GLVQ, SiameseGMLVQ
-
-
-class CELVQ(GLVQ):
-    """Cross-Entropy Learning Vector Quantization."""
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Loss
-        self.loss = torch.nn.CrossEntropyLoss()
-
-    def shared_step(self, batch, batch_idx, optimizer_idx=None):
-        x, y = batch
-        out = self.compute_distances(x)  # [None, num_protos]
-        plabels = self.proto_layer.component_labels
-        winning = stratified_min_pooling(out, plabels)  # [None, num_classes]
-        probs = -1.0 * winning
-        batch_loss = self.loss(probs, y.long())
-        loss = batch_loss.sum(dim=0)
-        return out, loss
-
-
-class ProbabilisticLVQ(GLVQ):
-    def __init__(self, hparams, rejection_confidence=0.0, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        self.conditional_distribution = None
-        self.rejection_confidence = rejection_confidence
-
-    def forward(self, x):
-        distances = self.compute_distances(x)
-        conditional = self.conditional_distribution(distances)
-        prior = (1. / self.num_prototypes) * torch.ones(self.num_prototypes,
-                                                        device=self.device)
-        posterior = conditional * prior
-        plabels = self.proto_layer._labels
-        y_pred = stratified_sum_pooling(posterior, plabels)
-        return y_pred
-
-    def predict(self, x):
-        y_pred = self.forward(x)
-        confidence, prediction = torch.max(y_pred, dim=1)
-        prediction[confidence < self.rejection_confidence] = -1
-        return prediction
-
-    def training_step(self, batch, batch_idx, optimizer_idx=None):
-        x, y = batch
-        out = self.forward(x)
-        plabels = self.proto_layer.component_labels
-        batch_loss = self.loss(out, y, plabels)
-        loss = batch_loss.sum(dim=0)
-        return loss
-
-
-class SLVQ(ProbabilisticLVQ):
-    """Soft Learning Vector Quantization."""
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.loss = LossLayer(nllr_loss)
-        self.conditional_distribution = GaussianPrior(self.hparams.variance)
-
-
-class RSLVQ(ProbabilisticLVQ):
-    """Robust Soft Learning Vector Quantization."""
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.loss = LossLayer(rslvq_loss)
-        self.conditional_distribution = GaussianPrior(self.hparams.variance)
-
-
-class PLVQ(ProbabilisticLVQ, SiameseGMLVQ):
-    """Probabilistic Learning Vector Quantization.
-
-    TODO: Use Backbone LVQ instead
-    """
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.conditional_distribution = RankScaledGaussianPrior(
-            self.hparams.lambd)
-        self.loss = torch.nn.KLDivLoss()
-
-    def training_step(self, batch, batch_idx, optimizer_idx=None):
-        x, y = batch
-        out = self.forward(x)
-        y_dist = torch.nn.functional.one_hot(
-            y.long(), num_classes=self.num_classes).float()
-        batch_loss = self.loss(out, y_dist)
-        loss = batch_loss.sum(dim=0)
-        return loss

prototorch/models/unsupervised.py

@@ -1,146 +0,0 @@
-"""Unsupervised prototype learning algorithms."""
-
-import numpy as np
-import torch
-from prototorch.functions.competitions import wtac
-from prototorch.functions.distances import squared_euclidean_distance
-from prototorch.modules import LambdaLayer
-from prototorch.modules.losses import NeuralGasEnergy
-
-from .abstract import NonGradientMixin, UnsupervisedPrototypeModel
-from .callbacks import GNGCallback
-from .extras import ConnectionTopology
-
-
-class KohonenSOM(NonGradientMixin, UnsupervisedPrototypeModel):
-    """Kohonen Self-Organizing-Map.
-
-    TODO Allow non-2D grids
-
-    """
-    def __init__(self, hparams, **kwargs):
-        h, w = hparams.get("shape")
-        # Ignore `num_prototypes`
-        hparams["num_prototypes"] = h * w
-        distance_fn = kwargs.pop("distance_fn", squared_euclidean_distance)
-        super().__init__(hparams, distance_fn=distance_fn, **kwargs)
-
-        # Hyperparameters
-        self.save_hyperparameters(hparams)
-
-        # Default hparams
-        self.hparams.setdefault("alpha", 0.3)
-        self.hparams.setdefault("sigma", max(h, w) / 2.0)
-
-        # Additional parameters
-        x, y = torch.arange(h), torch.arange(w)
-        grid = torch.stack(torch.meshgrid(x, y), dim=-1)
-        self.register_buffer("_grid", grid)
-        self._sigma = self.hparams.sigma
-        self._lr = self.hparams.lr
-
-    def predict_from_distances(self, distances):
-        grid = self._grid.view(-1, 2)
-        wp = wtac(distances, grid)
-        return wp
-
-    def training_step(self, train_batch, batch_idx):
-        # x = train_batch
-        # TODO Check if the batch has labels
-        x = train_batch[0]
-        d = self.compute_distances(x)
-        wp = self.predict_from_distances(d)
-        grid = self._grid.view(-1, 2)
-        gd = squared_euclidean_distance(wp, grid)
-        nh = torch.exp(-gd / self._sigma**2)
-        protos = self.proto_layer.components
-        diff = x.unsqueeze(dim=1) - protos
-        delta = self._lr * self.hparams.alpha * nh.unsqueeze(-1) * diff
-        updated_protos = protos + delta.sum(dim=0)
-        self.proto_layer.load_state_dict({"_components": updated_protos},
-                                         strict=False)
-
-    def training_epoch_end(self, training_step_outputs):
-        self._sigma = self.hparams.sigma * np.exp(
-            -self.current_epoch / self.trainer.max_epochs)
-
-    def extra_repr(self):
-        return f"(grid): (shape: {tuple(self._grid.shape)})"
-
-
-class HeskesSOM(UnsupervisedPrototypeModel):
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-    def training_step(self, train_batch, batch_idx):
-        # TODO Implement me!
-        raise NotImplementedError()
-
-
-class NeuralGas(UnsupervisedPrototypeModel):
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Hyperparameters
-        self.save_hyperparameters(hparams)
-
-        # Default hparams
-        self.hparams.setdefault("agelimit", 10)
-        self.hparams.setdefault("lm", 1)
-
-        self.energy_layer = NeuralGasEnergy(lm=self.hparams.lm)
-        self.topology_layer = ConnectionTopology(
-            agelimit=self.hparams.agelimit,
-            num_prototypes=self.hparams.num_prototypes,
-        )
-
-    def training_step(self, train_batch, batch_idx):
-        # x = train_batch
-        # TODO Check if the batch has labels
-        x = train_batch[0]
-        d = self.compute_distances(x)
-        loss, _ = self.energy_layer(d)
-        self.topology_layer(d)
-        self.log("loss", loss)
-        return loss
-
-    # def training_epoch_end(self, training_step_outputs):
-    #     print(f"{self.trainer.lr_schedulers}")
-    #     print(f"{self.trainer.lr_schedulers[0]['scheduler'].optimizer}")
-
-
-class GrowingNeuralGas(NeuralGas):
-    def __init__(self, hparams, **kwargs):
-        super().__init__(hparams, **kwargs)
-
-        # Defaults
-        self.hparams.setdefault("step_reduction", 0.5)
-        self.hparams.setdefault("insert_reduction", 0.1)
-        self.hparams.setdefault("insert_freq", 10)
-
-        errors = torch.zeros(self.hparams.num_prototypes, device=self.device)
-        self.register_buffer("errors", errors)
-
-    def training_step(self, train_batch, _batch_idx):
-        # x = train_batch
-        # TODO Check if the batch has labels
-        x = train_batch[0]
-        d = self.compute_distances(x)
-        loss, order = self.energy_layer(d)
-        winner = order[:, 0]
-        mask = torch.zeros_like(d)
-        mask[torch.arange(len(mask)), winner] = 1.0
-        dp = d * mask
-
-        self.errors += torch.sum(dp * dp, dim=0)
-        self.errors *= self.hparams.step_reduction
-
-        self.topology_layer(d)
-        self.log("loss", loss)
-        return loss
-
-    def configure_callbacks(self):
-        return [
-            GNGCallback(reduction=self.hparams.insert_reduction,
-                        freq=self.hparams.insert_freq)
-        ]

prototorch/models/vis.py

@@ -1,18 +1,28 @@
 """Visualization Callbacks."""
 
+import warnings
+from typing import Sized
+
 import numpy as np
 import pytorch_lightning as pl
 import torch
 import torchvision
 from matplotlib import pyplot as plt
+from prototorch.utils.colors import get_colors, get_legend_handles
+from prototorch.utils.utils import mesh2d
+from pytorch_lightning.loggers import TensorBoardLogger
 from torch.utils.data import DataLoader, Dataset
 
 
 class Vis2DAbstract(pl.Callback):
+
     def __init__(self,
-                 data,
+                 data=None,
                  title="Prototype Visualization",
                  cmap="viridis",
+                 xlabel="Data dimension 1",
+                 ylabel="Data dimension 2",
+                 legend_labels=None,
                  border=0.1,
                  resolution=100,
                  flatten_data=True,
@@ -25,24 +35,36 @@ class Vis2DAbstract(pl.Callback):
                  block=False):
         super().__init__()
 
-        if isinstance(data, Dataset):
+        if data:
-            x, y = next(iter(DataLoader(data, batch_size=len(data))))
+            if isinstance(data, Dataset):
-        elif isinstance(data, torch.utils.data.DataLoader):
+                if isinstance(data, Sized):
-            x = torch.tensor([])
+                    x, y = next(iter(DataLoader(data, batch_size=len(data))))
-            y = torch.tensor([])
+                else:
-            for x_b, y_b in data:
+                    # TODO: Add support for non-sized datasets
-                x = torch.cat([x, x_b])
+                    raise NotImplementedError(
-                y = torch.cat([y, y_b])
+                        "Data must be a dataset with a __len__ method.")
+            elif isinstance(data, DataLoader):
+                x = torch.tensor([])
+                y = torch.tensor([])
+                for x_b, y_b in data:
+                    x = torch.cat([x, x_b])
+                    y = torch.cat([y, y_b])
+            else:
+                x, y = data
+
+            if flatten_data:
+                x = x.reshape(len(x), -1)
+
+            self.x_train = x
+            self.y_train = y
         else:
-            x, y = data
+            self.x_train = None
-
+            self.y_train = None
-        if flatten_data:
-            x = x.reshape(len(x), -1)
-
-        self.x_train = x
-        self.y_train = y
 
         self.title = title
+        self.xlabel = xlabel
+        self.ylabel = ylabel
+        self.legend_labels = legend_labels
         self.fig = plt.figure(self.title)
         self.cmap = cmap
         self.border = border
@@ -61,35 +83,17 @@ class Vis2DAbstract(pl.Callback):
                 return False
         return True
 
-    def setup_ax(self, xlabel=None, ylabel=None):
+    def setup_ax(self):
         ax = self.fig.gca()
         ax.cla()
         ax.set_title(self.title)
-        if xlabel:
+        ax.set_xlabel(self.xlabel)
-            ax.set_xlabel("Data dimension 1")
+        ax.set_ylabel(self.ylabel)
-        if ylabel:
-            ax.set_ylabel("Data dimension 2")
         if self.axis_off:
             ax.axis("off")
         return ax
 
-    def get_mesh_input(self, x):
+    def plot_data(self, ax, x, y):
-        x_shift = self.border * np.ptp(x[:, 0])
-        y_shift = self.border * np.ptp(x[:, 1])
-        x_min, x_max = x[:, 0].min() - x_shift, x[:, 0].max() + x_shift
-        y_min, y_max = x[:, 1].min() - y_shift, x[:, 1].max() + y_shift
-        xx, yy = np.meshgrid(np.linspace(x_min, x_max, self.resolution),
-                             np.linspace(y_min, y_max, self.resolution))
-        mesh_input = np.c_[xx.ravel(), yy.ravel()]
-        return mesh_input, xx, yy
-
-    def perform_pca_2D(self, data):
-        (_, eigVal, eigVec) = torch.pca_lowrank(data, q=2)
-        return data @ eigVec
-
-    def plot_data(self, ax, x, y, pca=False):
-        if pca:
-            x = self.perform_pca_2D(x)
         ax.scatter(
             x[:, 0],
             x[:, 1],
@@ -100,9 +104,7 @@ class Vis2DAbstract(pl.Callback):
             s=30,
         )
 
-    def plot_protos(self, ax, protos, plabels, pca=False):
+    def plot_protos(self, ax, protos, plabels):
-        if pca:
-            protos = self.perform_pca_2D(protos)
         ax.scatter(
             protos[:, 0],
             protos[:, 1],
@@ -129,42 +131,47 @@ class Vis2DAbstract(pl.Callback):
             else:
                 plt.show(block=self.block)
 
+    def on_train_epoch_end(self, trainer, pl_module):
+        if not self.precheck(trainer):
+            return True
+        self.visualize(pl_module)
+        self.log_and_display(trainer, pl_module)
+
     def on_train_end(self, trainer, pl_module):
         plt.close()
 
+    def visualize(self, pl_module):
+        raise NotImplementedError
+
 
 class VisGLVQ2D(Vis2DAbstract):
-    def on_epoch_end(self, trainer, pl_module):
-        if not self.precheck(trainer):
-            return True
 
+    def visualize(self, pl_module):
         protos = pl_module.prototypes
         plabels = pl_module.prototype_labels
         x_train, y_train = self.x_train, self.y_train
-        ax = self.setup_ax(xlabel="Data dimension 1",
+        ax = self.setup_ax()
-                           ylabel="Data dimension 2")
-        self.plot_data(ax, x_train, y_train)
         self.plot_protos(ax, protos, plabels)
-        x = np.vstack((x_train, protos))
+        if x_train is not None:
-        mesh_input, xx, yy = self.get_mesh_input(x)
+            self.plot_data(ax, x_train, y_train)
+            mesh_input, xx, yy = mesh2d(np.vstack([x_train, protos]),
+                                        self.border, self.resolution)
+        else:
+            mesh_input, xx, yy = mesh2d(protos, self.border, self.resolution)
         _components = pl_module.proto_layer._components
         mesh_input = torch.from_numpy(mesh_input).type_as(_components)
         y_pred = pl_module.predict(mesh_input)
         y_pred = y_pred.cpu().reshape(xx.shape)
         ax.contourf(xx, yy, y_pred, cmap=self.cmap, alpha=0.35)
 
-        self.log_and_display(trainer, pl_module)
-
 
 class VisSiameseGLVQ2D(Vis2DAbstract):
+
     def __init__(self, *args, map_protos=True, **kwargs):
         super().__init__(*args, **kwargs)
         self.map_protos = map_protos
 
-    def on_epoch_end(self, trainer, pl_module):
+    def visualize(self, pl_module):
-        if not self.precheck(trainer):
-            return True
-
         protos = pl_module.prototypes
         plabels = pl_module.prototype_labels
         x_train, y_train = self.x_train, self.y_train
@@ -181,9 +188,9 @@ class VisSiameseGLVQ2D(Vis2DAbstract):
         if self.show_protos:
             self.plot_protos(ax, protos, plabels)
             x = np.vstack((x_train, protos))
-            mesh_input, xx, yy = self.get_mesh_input(x)
+            mesh_input, xx, yy = mesh2d(x, self.border, self.resolution)
         else:
-            mesh_input, xx, yy = self.get_mesh_input(x_train)
+            mesh_input, xx, yy = mesh2d(x_train, self.border, self.resolution)
         _components = pl_module.proto_layer._components
         mesh_input = torch.Tensor(mesh_input).type_as(_components)
         y_pred = pl_module.predict_latent(mesh_input,
@@ -191,87 +198,62 @@ class VisSiameseGLVQ2D(Vis2DAbstract):
         y_pred = y_pred.cpu().reshape(xx.shape)
         ax.contourf(xx, yy, y_pred, cmap=self.cmap, alpha=0.35)
 
-        self.log_and_display(trainer, pl_module)
-
 
 class VisGMLVQ2D(Vis2DAbstract):
-    def __init__(self, *args, map_protos=True, **kwargs):
+
+    def __init__(self, *args, ev_proj=True, **kwargs):
         super().__init__(*args, **kwargs)
-        self.map_protos = map_protos
+        self.ev_proj = ev_proj
-
-    def on_epoch_end(self, trainer, pl_module):
-        if not self.precheck(trainer):
-            return True
 
+    def visualize(self, pl_module):
         protos = pl_module.prototypes
         plabels = pl_module.prototype_labels
         x_train, y_train = self.x_train, self.y_train
         device = pl_module.device
+        omega = pl_module._omega.detach()
+        lam = omega @ omega.T
+        u, _, _ = torch.pca_lowrank(lam, q=2)
         with torch.no_grad():
-            x_train = pl_module.backbone(torch.Tensor(x_train).to(device))
+            x_train = torch.Tensor(x_train).to(device)
+            x_train = x_train @ u
             x_train = x_train.cpu().detach()
-        if self.map_protos:
+        if self.show_protos:
             with torch.no_grad():
-                protos = pl_module.backbone(torch.Tensor(protos).to(device))
+                protos = torch.Tensor(protos).to(device)
+                protos = protos @ u
                 protos = protos.cpu().detach()
         ax = self.setup_ax()
-        if x_train.shape[1] > 2:
+        self.plot_data(ax, x_train, y_train)
-            self.plot_data(ax, x_train, y_train, pca=True)
-        else:
-            self.plot_data(ax, x_train, y_train, pca=False)
         if self.show_protos:
-            if protos.shape[1] > 2:
+            self.plot_protos(ax, protos, plabels)
-                self.plot_protos(ax, protos, plabels, pca=True)
-            else:
-                self.plot_protos(ax, protos, plabels, pca=False)
-        ### something to work on: meshgrid with pca
-        #    x = np.vstack((x_train, protos))
-        #    mesh_input, xx, yy = self.get_mesh_input(x)
-        #else:
-        #    mesh_input, xx, yy = self.get_mesh_input(x_train)
-        #_components = pl_module.proto_layer._components
-        #mesh_input = torch.Tensor(mesh_input).type_as(_components)
-        #y_pred = pl_module.predict_latent(mesh_input,
-        #                                  map_protos=self.map_protos)
-        #y_pred = y_pred.cpu().reshape(xx.shape)
-        #ax.contourf(xx, yy, y_pred, cmap=self.cmap, alpha=0.35)
-        self.log_and_display(trainer, pl_module)
 
 
 class VisCBC2D(Vis2DAbstract):
-    def on_epoch_end(self, trainer, pl_module):
-        if not self.precheck(trainer):
-            return True
 
+    def visualize(self, pl_module):
         x_train, y_train = self.x_train, self.y_train
         protos = pl_module.components
-        ax = self.setup_ax(xlabel="Data dimension 1",
+        ax = self.setup_ax()
-                           ylabel="Data dimension 2")
         self.plot_data(ax, x_train, y_train)
         self.plot_protos(ax, protos, "w")
         x = np.vstack((x_train, protos))
-        mesh_input, xx, yy = self.get_mesh_input(x)
+        mesh_input, xx, yy = mesh2d(x, self.border, self.resolution)
-        _components = pl_module.component_layer._components
+        _components = pl_module.components_layer._components
         y_pred = pl_module.predict(
             torch.Tensor(mesh_input).type_as(_components))
         y_pred = y_pred.cpu().reshape(xx.shape)
 
         ax.contourf(xx, yy, y_pred, cmap=self.cmap, alpha=0.35)
 
-        self.log_and_display(trainer, pl_module)
-
 
 class VisNG2D(Vis2DAbstract):
-    def on_epoch_end(self, trainer, pl_module):
-        if not self.precheck(trainer):
-            return True
 
+    def visualize(self, pl_module):
         x_train, y_train = self.x_train, self.y_train
         protos = pl_module.prototypes
         cmat = pl_module.topology_layer.cmat.cpu().numpy()
 
-        ax = self.setup_ax(xlabel="Data dimension 1",
+        ax = self.setup_ax()
-                           ylabel="Data dimension 2")
         self.plot_data(ax, x_train, y_train)
         self.plot_protos(ax, protos, "w")
 
@@ -285,10 +267,27 @@ class VisNG2D(Vis2DAbstract):
                         "k-",
                     )
 
-        self.log_and_display(trainer, pl_module)
+
+class VisSpectralProtos(Vis2DAbstract):
+
+    def visualize(self, pl_module):
+        protos = pl_module.prototypes
+        plabels = pl_module.prototype_labels
+        ax = self.setup_ax()
+        colors = get_colors(vmax=max(plabels), vmin=min(plabels))
+        for p, pl in zip(protos, plabels):
+            ax.plot(p, c=colors[int(pl)])
+        if self.legend_labels:
+            handles = get_legend_handles(
+                colors,
+                self.legend_labels,
+                marker="lines",
+            )
+            ax.legend(handles=handles)
 
 
 class VisImgComp(Vis2DAbstract):
+
     def __init__(self,
                  *args,
                  random_data=0,
@@ -304,32 +303,45 @@ class VisImgComp(Vis2DAbstract):
         self.add_embedding = add_embedding
         self.embedding_data = embedding_data
 
-    def on_train_start(self, trainer, pl_module):
+    def on_train_start(self, _, pl_module):
-        tb = pl_module.logger.experiment
+        if isinstance(pl_module.logger, TensorBoardLogger):
-        if self.add_embedding:
+            tb = pl_module.logger.experiment
-            ind = np.random.choice(len(self.x_train),
-                                   size=self.embedding_data,
-                                   replace=False)
-            data = self.x_train[ind]
-            # print(f"{data.shape=}")
-            # print(f"{self.y_train[ind].shape=}")
-            tb.add_embedding(data.view(len(ind), -1),
-                             label_img=data,
-                             global_step=None,
-                             tag="Data Embedding",
-                             metadata=self.y_train[ind],
-                             metadata_header=None)
 
-        if self.random_data:
+            # Add embedding
-            ind = np.random.choice(len(self.x_train),
+            if self.add_embedding:
-                                   size=self.random_data,
+                if self.x_train is not None and self.y_train is not None:
-                                   replace=False)
+                    ind = np.random.choice(len(self.x_train),
-            data = self.x_train[ind]
+                                           size=self.embedding_data,
-            grid = torchvision.utils.make_grid(data, nrow=self.num_columns)
+                                           replace=False)
-            tb.add_image(tag="Data",
+                    data = self.x_train[ind]
-                         img_tensor=grid,
+                    tb.add_embedding(data.view(len(ind), -1),
-                         global_step=None,
+                                     label_img=data,
-                         dataformats=self.dataformats)
+                                     global_step=None,
+                                     tag="Data Embedding",
+                                     metadata=self.y_train[ind],
+                                     metadata_header=None)
+                else:
+                    raise ValueError("No data for add embedding flag")
+
+            # Random Data
+            if self.random_data:
+                if self.x_train is not None:
+                    ind = np.random.choice(len(self.x_train),
+                                           size=self.random_data,
+                                           replace=False)
+                    data = self.x_train[ind]
+                    grid = torchvision.utils.make_grid(data,
+                                                       nrow=self.num_columns)
+                    tb.add_image(tag="Data",
+                                 img_tensor=grid,
+                                 global_step=None,
+                                 dataformats=self.dataformats)
+                else:
+                    raise ValueError("No data for random data flag")
+
+        else:
+            warnings.warn(
+                f"TensorBoardLogger is required, got {type(pl_module.logger)}")
 
     def add_to_tensorboard(self, trainer, pl_module):
         tb = pl_module.logger.experiment
@@ -343,14 +355,9 @@ class VisImgComp(Vis2DAbstract):
             dataformats=self.dataformats,
         )
 
-    def on_epoch_end(self, trainer, pl_module):
+    def visualize(self, pl_module):
-        if not self.precheck(trainer):
-            return True
-
         if self.show:
             components = pl_module.components
             grid = torchvision.utils.make_grid(components,
                                                nrow=self.num_columns)
             plt.imshow(grid.permute((1, 2, 0)).cpu(), cmap=self.cmap)
-
-        self.log_and_display(trainer, pl_module)

setup.cfg

@@ -0,0 +1,23 @@
+[yapf]
+based_on_style = pep8
+spaces_before_comment = 2
+split_before_logical_operator = true
+
+[pylint]
+disable =
+	too-many-arguments,
+	too-few-public-methods,
+	fixme,
+
+
+[pycodestyle]
+max-line-length = 79
+
+[isort]
+profile = hug
+src_paths = isort, test
+multi_line_output = 3
+include_trailing_comma = True
+force_grid_wrap = 3
+use_parentheses = True
+line_length = 79

setup.py

@@ -10,6 +10,8 @@
 
 ProtoTorch models Plugin Package
 """
+from pathlib import Path
+
 from pkg_resources import safe_name
 from setuptools import find_namespace_packages, setup
 
@@ -18,13 +20,13 @@ PLUGIN_NAME = "models"
 PROJECT_URL = "https://github.com/si-cim/prototorch_models"
 DOWNLOAD_URL = "https://github.com/si-cim/prototorch_models.git"
 
-with open("README.md", "r") as fh:
+long_description = Path("README.md").read_text(encoding='utf8')
-    long_description = fh.read()
 
 INSTALL_REQUIRES = [
-    "prototorch>=0.5.0,<0.6.0",
+    "prototorch>=0.7.3",
-    "pytorch_lightning>=1.3.5",
+    "pytorch_lightning>=1.6.0",
     "torchmetrics",
+    "protobuf<3.20.0",
 ]
 CLI = [
     "jsonargparse",
@@ -37,6 +39,7 @@ DOCS = [
     "recommonmark",
     "sphinx",
     "nbsphinx",
+    "ipykernel",
     "sphinx_rtd_theme",
     "sphinxcontrib-katex",
     "sphinxcontrib-bibtex",
@@ -53,7 +56,7 @@ ALL = CLI + DEV + DOCS + EXAMPLES + TESTS
 
 setup(
     name=safe_name("prototorch_" + PLUGIN_NAME),
-    version="0.1.8",
+    version="1.0.0-a8",
     description="Pre-packaged prototype-based "
     "machine learning models using ProtoTorch and PyTorch-Lightning.",
     long_description=long_description,
@@ -63,7 +66,7 @@ setup(
     url=PROJECT_URL,
     download_url=DOWNLOAD_URL,
     license="MIT",
-    python_requires=">=3.9",
+    python_requires=">=3.7",
     install_requires=INSTALL_REQUIRES,
     extras_require={
         "dev": DEV,
@@ -79,7 +82,11 @@ setup(
         "Intended Audience :: Science/Research",
         "License :: OSI Approved :: MIT License",
         "Natural Language :: English",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.7",
         "Operating System :: OS Independent",
         "Topic :: Scientific/Engineering :: Artificial Intelligence",
         "Topic :: Software Development :: Libraries",

tests/test_.py

@@ -1,14 +0,0 @@
-"""prototorch.models test suite."""
-
-import unittest
-
-
-class TestDummy(unittest.TestCase):
-    def setUp(self):
-        pass
-
-    def test_dummy(self):
-        pass
-
-    def tearDown(self):
-        pass

tests/test_examples.sh

@@ -1,17 +1,35 @@
 #! /bin/bash
 
+
+# Read Flags
+gpu=0
+while [ -n "$1" ]; do
+	case "$1" in
+	    --gpu) gpu=1;;
+	    -g) gpu=1;;
+        *) path=$1;;
+	esac
+	shift
+done
+
+python --version
+echo "Using GPU: " $gpu
+
+# Loop
 failed=0
 
-for example in $(find $1 -maxdepth 1 -name "*.py")
+for example in $(find $path -maxdepth 1 -name "*.py")
 do
     echo  -n "$x" $example '... '
-    export DISPLAY= && python $example --fast_dev_run 1 &> /dev/null
+    export DISPLAY= && python $example --fast_dev_run 1 --gpus $gpu &> run_log.txt
     if [[ $? -ne 0 ]]; then
         echo "FAILED!!"
+        cat run_log.txt
         failed=1
     else
         echo "SUCCESS!"
     fi
+    rm run_log.txt
 done
 
 exit $failed

tests/test_models.py

@@ -0,0 +1,13 @@
+"""prototorch.models test suite."""
+
+import prototorch as pt
+from prototorch.models.library import GLVQ
+
+
+def test_glvq_model_build():
+    hparams = GLVQ.HyperParameters(
+        distribution=dict(num_classes=2, per_class=1),
+        component_initializer=pt.initializers.RNCI(2),
+    )
+
+    model = GLVQ(hparams=hparams)