[BUGFIX] Remove dangerous mutable default arguments

See
https://stackoverflow.com/questions/1132941/least-astonishment-and-the-mutable-default-argument
for more information.

tests/test_core.py

@@ -52,7 +52,7 @@ def test_parse_distribution_custom_labels():
 def test_literal_comp_generate():
     protos = torch.rand(4, 3, 5, 5)
     c = pt.initializers.LiteralCompInitializer(protos)
-    components = c.generate()
+    components = c.generate([])
     assert torch.allclose(components, protos)
 
 
@@ -60,7 +60,7 @@ def test_literal_comp_generate_from_list():
     protos = [[0, 1], [2, 3], [4, 5]]
     c = pt.initializers.LiteralCompInitializer(protos)
     with pytest.warns(UserWarning):
-        components = c.generate()
+        components = c.generate([])
     assert torch.allclose(components, torch.Tensor(protos))
 
 
@@ -162,7 +162,7 @@ def test_stratified_selection_comp_generate():
 def test_literal_labels_init():
     l = pt.initializers.LiteralLabelsInitializer([0, 0, 1, 2])
     with pytest.warns(UserWarning):
-        labels = l.generate()
+        labels = l.generate([])
     assert torch.allclose(labels, torch.LongTensor([0, 0, 1, 2]))
 
 
@@ -188,7 +188,7 @@ def test_data_aware_labels_init():
     data, targets = [0, 1, 2, 3], [0, 0, 1, 1]
     ds = pt.datasets.NumpyDataset(data, targets)
     l = pt.initializers.DataAwareLabelsInitializer(ds)
-    labels = l.generate()
+    labels = l.generate([])
     assert torch.allclose(labels, torch.LongTensor(targets))
 
 
@@ -196,7 +196,7 @@ def test_data_aware_labels_init():
 def test_literal_reasonings_init():
     r = pt.initializers.LiteralReasoningsInitializer([0, 0, 1, 2])
     with pytest.warns(UserWarning):
-        reasonings = r.generate()
+        reasonings = r.generate([])
     assert torch.allclose(reasonings, torch.Tensor([0, 0, 1, 2]))