def test_pretrained(self):
tw = TextWiser(Embedding.TfIdf(pretrained=None, min_df=2),
dtype=torch.float32)
expected = torch.tensor(
[[0.4813341796, 0.6198053956, 0.0000000000, 0.6198053956],
[0.4091228545, 0.5268201828, 0.5268201828, 0.5268201828],
[0.6133555174, 0.0000000000, 0.7898069024, 0.0000000000]],
dtype=torch.float32)
self._test_fit_transform(tw, expected)
# Test loading from bytes
with NamedTemporaryFile() as file:
pickle.dump(tw._imp[0].vectorizer, file)
file.seek(0)
tw = TextWiser(Embedding.TfIdf(pretrained=file),
dtype=torch.float32)
predicted = tw.fit_transform(docs)
self.assertTrue(
torch.allclose(predicted, expected.to(device), atol=1e-6))
# Test loading from file
file_path = self._get_test_path('data', 'tfidf.pkl')
with open(file_path, 'wb') as fp:
pickle.dump(tw._imp[0].vectorizer, fp)
tw = TextWiser(Embedding.TfIdf(pretrained=file_path),
dtype=torch.float32)
predicted = tw.fit_transform(docs)
self.assertTrue(
torch.allclose(predicted, expected.to(device), atol=1e-6))
os.remove(file_path)
def test_pretrained_error(self):
# Not a string
with self.assertRaises(ValueError):
TextWiser(Embedding.TfIdf(pretrained=3), dtype=torch.float32)
# Not a path
with self.assertRaises(ValueError):
TextWiser(Embedding.TfIdf(pretrained='|||||||'),
dtype=torch.float32)
# Not a path on the embedding object
with self.assertRaises(ValueError):
_TfIdfEmbeddings(pretrained='|||||||')._init_vectorizer()
def test_num_components(self):
# The natural # of components is 3.
n_components = 2 # Restrict the # of components
tw = TextWiser(Embedding.TfIdf(min_df=2),
Transformation.SVD(n_components=n_components),
dtype=torch.float32)
predicted = tw.fit_transform(docs)
self.assertEqual(predicted.shape[1], n_components)
self._reset_seed()
n_components = 200 # Expand the # of components
tw = TextWiser(Embedding.TfIdf(min_df=2),
Transformation.SVD(n_components=n_components),
dtype=torch.float32)
predicted = tw.fit_transform(docs)
self.assertEqual(predicted.shape[1], n_components)
def test_fine_tuneable(self):
tw = TextWiser(Embedding.TfIdf(min_df=2),
Transformation.SVD(n_components=2),
dtype=torch.float32,
is_finetuneable=True)
tw.fit(docs)
embeddings1 = tw._imp[1].V.data.clone().detach()
# Give a fake task to train embeddings on
# Have a linear layer with a single output after pooling
linear = nn.Linear(2, 1, bias=False)
model = nn.Sequential(tw, linear).to(device).train()
y_pred = model(docs)
# Use ones as the target
y_act = torch.ones_like(y_pred)
# Optimize MSE using SGD
criterion = nn.MSELoss()
optimizer = optim.SGD(model.parameters(), lr=1e-3)
# Calculate the loss & gradients
optimizer.zero_grad()
loss = criterion(y_pred, y_act)
loss.backward()
# The embedding layer should have gradients now
self.assertIsNotNone([p for p in tw._imp[1].named_parameters()
][0][1].grad)
# Update weights
optimizer.step()
# The weights should be updated if fine_tune is true, else it should be the same
self.assertFalse(torch.allclose(embeddings1, tw._imp[1].V.data))
def test_v_in_parameters(self):
n_components = 2 # Restrict the # of components
tw = TextWiser(Embedding.TfIdf(min_df=2),
Transformation.SVD(n_components=n_components),
dtype=torch.float32)
tw.fit(docs)
self.assertIn('_imp.1.V', [p[0] for p in tw.named_parameters()])
def test_set_params(self):
# Set the arguments in container classes
tw = TextWiser(Embedding.TfIdf(min_df=5),
Transformation.NMF(n_components=30),
lazy_load=True)
tw.set_params(embedding__min_df=10,
transformations__0__n_components=10)
self.assertEqual(tw.embedding.min_df, 10)
self.assertEqual(tw.transformations[0].n_components, 10)
# Set the arguments in implementation
tw = TextWiser(Embedding.Doc2Vec(vector_size=2, min_count=1,
workers=1))
tw.fit(docs)
tw.set_params(_imp__0__seed=10)
self.assertEqual(tw._imp[0].seed, 10)
# Set the arguments in a schema
schema = {'transform': ['tfidf', ['nmf', {'n_components': 30}]]}
tw = TextWiser(Embedding.Compound(schema=schema))
tw.set_params(embedding__schema__transform__0__min_df=10,
embedding__schema__transform__1__n_components=10)
self.assertEqual(tw.embedding.schema['transform'][0][1]['min_df'], 10)
self.assertEqual(
tw.embedding.schema['transform'][1][1]['n_components'], 10)
# Replace a part of the schema in a list
tw.set_params(embedding__schema__transform__0='bow')
self.assertEqual(tw.embedding.schema['transform'][0], 'bow')
# Replace a part of the schema
tw.set_params(embedding__schema__transform=['bow'])
self.assertEqual(tw.embedding.schema['transform'][0], 'bow')
def test_min_components(self):
try:
with self.assertRaises(ValueError):
TextWiser(Embedding.TfIdf(min_df=2),
Transformation.UMAP(n_components=1),
dtype=torch.float32)
except ModuleNotFoundError:
print('No UMAP found. Skipping the test. ...', end=" ", flush=True)
def test_fit_transform(self):
tw = TextWiser(Embedding.TfIdf(min_df=2), dtype=torch.float32)
expected = torch.tensor(
[[0.4813341796, 0.6198053956, 0.0000000000, 0.6198053956],
[0.4091228545, 0.5268201828, 0.5268201828, 0.5268201828],
[0.6133555174, 0.0000000000, 0.7898069024, 0.0000000000]],
dtype=torch.float32)
self._test_fit_transform(tw, expected)
self._test_fit_before_transform(tw, expected)
def test_fit_transform(self):
tw = TextWiser(Embedding.TfIdf(min_df=2),
Transformation.SVD(n_components=2),
dtype=torch.float32)
expected = torch.tensor(
[[-0.8526761532, 0.5070778131], [-0.9837458134, 0.0636523664],
[-0.7350711226, -0.6733918786]],
dtype=torch.float32)
self._test_fit_transform(tw, expected)
self._reset_seed()
self._test_fit_before_transform(tw, expected)
def test_fit_transform(self):
tw = TextWiser(Embedding.TfIdf(min_df=2),
Transformation.NMF(n_components=2),
dtype=torch.float32)
expected = torch.tensor(
[[0.8865839243, 0.0000000000], [0.6736079454, 0.5221673250],
[0.0203559380, 1.1122620106]],
dtype=torch.float32)
self._test_fit_transform(tw, expected)
self._reset_seed()
self._test_fit_before_transform(tw, expected, atol=1e-5)
def test_fit_transform(self):
tw = TextWiser(Embedding.TfIdf(min_df=2),
Transformation.LDA(n_components=2),
dtype=torch.float32)
expected = torch.tensor(
[[0.7724367976, 0.2275632024], [0.5895692706, 0.4104307294],
[0.2381444573, 0.7618555427]],
dtype=torch.float32)
self._test_fit_transform(tw, expected)
self._reset_seed()
self._test_fit_before_transform(tw, expected)
def test_fit_transform(self):
try:
tw = TextWiser(Embedding.TfIdf(min_df=1),
Transformation.UMAP(init='random',
n_neighbors=2,
n_components=2),
dtype=torch.float32)
expected = torch.tensor([[-12.1613626480, 22.0555286407],
[-11.3154125214, 22.4605998993],
[-10.7626724243, 21.6793708801]],
dtype=torch.float32)
self._test_fit_transform(tw, expected)
self._reset_seed()
self._test_fit_before_transform(tw, expected)
except ModuleNotFoundError:
print('No UMAP found. Skipping the test. ...', end=" ", flush=True)
def test_min_components(self):
with self.assertRaises(ValueError):
TextWiser(Embedding.TfIdf(min_df=2),
Transformation.SVD(n_components=1),
dtype=torch.float32)
def test_finetune_validation(self):
# Nothing is fine-tuneable if dtype is numpy
with self.assertRaises(TypeError):
with warnings.catch_warnings():
warnings.simplefilter("ignore")
TextWiser(Embedding.Word(word_option=WordOptions.word2vec,
pretrained='en_turian'),
dtype=np.float32,
is_finetuneable=True)
# Word2Vec is fine-tuneable
try:
with warnings.catch_warnings():
warnings.simplefilter("ignore")
TextWiser(Embedding.Word(word_option=WordOptions.word2vec,
pretrained='en-turian'),
dtype=torch.float32,
is_finetuneable=True,
lazy_load=True)
except ValueError:
self.fail("Word2vec is fine tuneable")
# ELMo is not fine-tuneable, and should raise an error
with self.assertRaises(ValueError):
with warnings.catch_warnings():
warnings.simplefilter("ignore")
TextWiser(Embedding.Word(word_option=WordOptions.elmo),
dtype=torch.float32,
is_finetuneable=True,
lazy_load=True)
# TfIdf is not fine-tuneable, and should raise an error
with self.assertRaises(ValueError):
TextWiser(Embedding.TfIdf(),
dtype=torch.float32,
is_finetuneable=True,
lazy_load=True)
# TfIdf is not fine-tuneable, but SVD is
try:
TextWiser(Embedding.TfIdf(),
Transformation.SVD(),
dtype=torch.float32,
is_finetuneable=True,
lazy_load=True)
except ValueError:
self.fail("SVD is fine tuneable")
# LDA cannot propagate gradients, so the whole thing is not fine-tuneable
with self.assertRaises(ValueError):
with warnings.catch_warnings():
warnings.simplefilter("ignore")
TextWiser(Embedding.Word(word_option=WordOptions.word2vec,
pretrained='en'),
Transformation.LDA(),
dtype=torch.float32,
is_finetuneable=True,
lazy_load=True)
schema = {
'concat': [{
'transform': [('word2vec', {
'pretrained': 'en-turian'
}), ('pool', {
'pool_option': 'max'
})]
}, {
'transform': ['tfidf', ('nmf', {
'n_components': 30
})]
}]
}
# Word2Vec is fine-tuneable, therefore the whole schema is fine-tuneable
try:
TextWiser(Embedding.Compound(schema=schema),
dtype=torch.float32,
is_finetuneable=True,
lazy_load=True)
except ValueError:
self.fail(
"Any fine-tuneable weights is enough for the model to be fine-tuneable"
)
# TfIdf is not fine-tuneable, but SVD is
schema = {'transform': ['tfidf', 'svd']}
try:
TextWiser(Embedding.Compound(schema=schema),
dtype=torch.float32,
is_finetuneable=True,
lazy_load=True)
except ValueError:
self.fail("SVD is fine tuneable")
def test_forward_before_fit(self):
"""Calling `forward` before `fit` should fail"""
with self.assertRaises(NotImplementedError):
TextWiser(Embedding.TfIdf()).transform('document')
