class PretrainedSimpleWordEmbedderSanityTest(unittest.TestCase):
def setUp(self):
xnmt.events.clear()
self.input_reader = PlainTextReader()
list(self.input_reader.read_sents('examples/data/head.ja'))
self.input_reader.freeze()
self.context = ModelContext()
self.context.dynet_param_collection = PersistentParamCollection(
None, 0)
def test_load(self):
"""
Checks that the embeddings can be loaded, have the right dimension, and that one line matches.
"""
embedder = PretrainedSimpleWordEmbedder(
self.context, self.input_reader.vocab,
'examples/data/wiki.ja.vec.small', 300)
# self.assertEqual(embedder.embeddings.shape()[::-1], (self.input_reader.vocab_size(), 300))
with io.open('examples/data/wiki.ja.vec.small',
encoding='utf-8') as vecfile:
test_line = next(islice(vecfile, 9,
None)).split() # Select the vector for '日'
test_word = test_line[0]
test_id = self.input_reader.vocab.w2i[test_word]
test_emb = test_line[1:]
self.assertTrue(
np.allclose(embedder.embeddings.batch([test_id
]).npvalue().tolist(),
np.array(test_emb, dtype=float).tolist(),
rtol=1e-5))
class TestTruncatedBatchTraining(unittest.TestCase):
def setUp(self):
xnmt.events.clear()
self.exp_global = ExpGlobal(
dynet_param_collection=NonPersistentParamCollection())
self.src_reader = PlainTextReader()
self.trg_reader = PlainTextReader()
self.src_data = list(
self.src_reader.read_sents("examples/data/head.ja"))
self.trg_data = list(
self.trg_reader.read_sents("examples/data/head.en"))
def assert_single_loss_equals_batch_loss(self,
model,
pad_src_to_multiple=1):
"""
Tests whether single loss equals batch loss.
Truncating src / trg sents to same length so no masking is necessary
"""
batch_size = 5
src_sents = self.src_data[:batch_size]
src_min = min([len(x) for x in src_sents])
src_sents_trunc = [s[:src_min] for s in src_sents]
for single_sent in src_sents_trunc:
single_sent[src_min - 1] = Vocab.ES
while len(single_sent) % pad_src_to_multiple != 0:
single_sent.append(Vocab.ES)
trg_sents = self.trg_data[:batch_size]
trg_min = min([len(x) for x in trg_sents])
trg_sents_trunc = [s[:trg_min] for s in trg_sents]
for single_sent in trg_sents_trunc:
single_sent[trg_min - 1] = Vocab.ES
single_loss = 0.0
for sent_id in range(batch_size):
dy.renew_cg()
train_loss = model.calc_loss(
src=src_sents_trunc[sent_id],
trg=trg_sents_trunc[sent_id],
loss_calculator=LossCalculator()).value()
single_loss += train_loss
dy.renew_cg()
batched_loss = model.calc_loss(
src=mark_as_batch(src_sents_trunc),
trg=mark_as_batch(trg_sents_trunc),
loss_calculator=LossCalculator()).value()
self.assertAlmostEqual(single_loss, sum(batched_loss), places=4)
def test_loss_model1(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=BiLSTMSeqTransducer(self.exp_global),
attender=MlpAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(self.exp_global,
vocab_size=100,
bridge=CopyBridge(
exp_global=self.exp_global,
dec_layers=1)),
)
model.set_train(False)
self.assert_single_loss_equals_batch_loss(model)
def test_loss_model2(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=PyramidalLSTMSeqTransducer(self.exp_global, layers=3),
attender=MlpAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(self.exp_global,
vocab_size=100,
bridge=CopyBridge(
exp_global=self.exp_global,
dec_layers=1)),
)
model.set_train(False)
self.assert_single_loss_equals_batch_loss(model, pad_src_to_multiple=4)
def test_loss_model3(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=BiLSTMSeqTransducer(self.exp_global, layers=3),
attender=MlpAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(exp_global=self.exp_global,
vocab_size=100,
bridge=CopyBridge(
exp_global=self.exp_global,
dec_layers=1)),
)
model.set_train(False)
self.assert_single_loss_equals_batch_loss(model)
def test_loss_model4(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=BiLSTMSeqTransducer(self.exp_global),
attender=DotAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(self.exp_global,
vocab_size=100,
bridge=CopyBridge(
exp_global=self.exp_global,
dec_layers=1)),
)
model.set_train(False)
self.assert_single_loss_equals_batch_loss(model)
class TestBatchTraining(unittest.TestCase):
def setUp(self):
xnmt.events.clear()
self.exp_global = ExpGlobal(
dynet_param_collection=NonPersistentParamCollection())
self.src_reader = PlainTextReader()
self.trg_reader = PlainTextReader()
self.src_data = list(
self.src_reader.read_sents("examples/data/head.ja"))
self.trg_data = list(
self.trg_reader.read_sents("examples/data/head.en"))
def assert_single_loss_equals_batch_loss(self,
model,
pad_src_to_multiple=1):
"""
Tests whether single loss equals batch loss.
Here we don't truncate the target side and use masking.
"""
batch_size = 5
src_sents = self.src_data[:batch_size]
src_min = min([len(x) for x in src_sents])
src_sents_trunc = [s[:src_min] for s in src_sents]
for single_sent in src_sents_trunc:
single_sent[src_min - 1] = Vocab.ES
while len(single_sent) % pad_src_to_multiple != 0:
single_sent.append(Vocab.ES)
trg_sents = self.trg_data[:batch_size]
trg_max = max([len(x) for x in trg_sents])
trg_masks = Mask(np.zeros([batch_size, trg_max]))
for i in range(batch_size):
for j in range(len(trg_sents[i]), trg_max):
trg_masks.np_arr[i, j] = 1.0
trg_sents_padded = [[w for w in s] + [Vocab.ES] * (trg_max - len(s))
for s in trg_sents]
single_loss = 0.0
for sent_id in range(batch_size):
dy.renew_cg()
train_loss = model.calc_loss(
src=src_sents_trunc[sent_id],
trg=trg_sents[sent_id],
loss_calculator=LossCalculator()).value()
single_loss += train_loss
dy.renew_cg()
batched_loss = model.calc_loss(
src=mark_as_batch(src_sents_trunc),
trg=mark_as_batch(trg_sents_padded, trg_masks),
loss_calculator=LossCalculator()).value()
self.assertAlmostEqual(single_loss, sum(batched_loss), places=4)
def test_loss_model1(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(exp_global=self.exp_global,
vocab_size=100),
encoder=BiLSTMSeqTransducer(exp_global=self.exp_global),
attender=MlpAttender(exp_global=self.exp_global),
trg_embedder=SimpleWordEmbedder(exp_global=self.exp_global,
vocab_size=100),
decoder=MlpSoftmaxDecoder(exp_global=self.exp_global,
vocab_size=100,
bridge=CopyBridge(
exp_global=self.exp_global,
dec_layers=1)),
)
model.set_train(False)
self.assert_single_loss_equals_batch_loss(model)
def test_loss_model2(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(exp_global=self.exp_global,
vocab_size=100),
encoder=PyramidalLSTMSeqTransducer(exp_global=self.exp_global,
layers=3),
attender=MlpAttender(exp_global=self.exp_global),
trg_embedder=SimpleWordEmbedder(exp_global=self.exp_global,
vocab_size=100),
decoder=MlpSoftmaxDecoder(exp_global=self.exp_global,
vocab_size=100,
bridge=CopyBridge(
exp_global=self.exp_global,
dec_layers=1)),
)
model.set_train(False)
self.assert_single_loss_equals_batch_loss(model, pad_src_to_multiple=4)
def test_loss_model3(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(exp_global=self.exp_global,
vocab_size=100),
encoder=BiLSTMSeqTransducer(exp_global=self.exp_global, layers=3),
attender=MlpAttender(exp_global=self.exp_global),
trg_embedder=SimpleWordEmbedder(exp_global=self.exp_global,
vocab_size=100),
decoder=MlpSoftmaxDecoder(exp_global=self.exp_global,
vocab_size=100,
bridge=CopyBridge(
exp_global=self.exp_global,
dec_layers=1)),
)
model.set_train(False)
self.assert_single_loss_equals_batch_loss(model)
class TestEncoder(unittest.TestCase):
def setUp(self):
xnmt.events.clear()
self.exp_global = ExpGlobal(
dynet_param_collection=PersistentParamCollection("some_file", 1))
self.src_reader = PlainTextReader()
self.trg_reader = PlainTextReader()
self.src_data = list(
self.src_reader.read_sents("examples/data/head.ja"))
self.trg_data = list(
self.trg_reader.read_sents("examples/data/head.en"))
@xnmt.events.register_xnmt_event
def set_train(self, val):
pass
@xnmt.events.register_xnmt_event
def start_sent(self, src):
pass
def assert_in_out_len_equal(self, model):
dy.renew_cg()
self.set_train(True)
src = self.src_data[0]
self.start_sent(src)
embeddings = model.src_embedder.embed_sent(src)
encodings = model.encoder(embeddings)
self.assertEqual(len(embeddings), len(encodings))
def test_bi_lstm_encoder_len(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=BiLSTMSeqTransducer(self.exp_global, layers=3),
attender=MlpAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(self.exp_global, vocab_size=100),
)
self.assert_in_out_len_equal(model)
def test_uni_lstm_encoder_len(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=UniLSTMSeqTransducer(self.exp_global),
attender=MlpAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(self.exp_global, vocab_size=100),
)
self.assert_in_out_len_equal(model)
def test_res_lstm_encoder_len(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=ResidualLSTMSeqTransducer(self.exp_global, layers=3),
attender=MlpAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(self.exp_global, vocab_size=100),
)
self.assert_in_out_len_equal(model)
def test_py_lstm_encoder_len(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=PyramidalLSTMSeqTransducer(self.exp_global, layers=3),
attender=MlpAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(self.exp_global, vocab_size=100),
)
self.set_train(True)
for sent_i in range(10):
dy.renew_cg()
src = self.src_data[sent_i].get_padded_sent(
Vocab.ES, 4 - (len(self.src_data[sent_i]) % 4))
self.start_sent(src)
embeddings = model.src_embedder.embed_sent(src)
encodings = model.encoder(embeddings)
self.assertEqual(int(math.ceil(len(embeddings) / float(4))),
len(encodings))
def test_py_lstm_mask(self):
model = DefaultTranslator(
src_reader=self.src_reader,
trg_reader=self.trg_reader,
src_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
encoder=PyramidalLSTMSeqTransducer(self.exp_global, layers=1),
attender=MlpAttender(self.exp_global),
trg_embedder=SimpleWordEmbedder(self.exp_global, vocab_size=100),
decoder=MlpSoftmaxDecoder(self.exp_global, vocab_size=100),
)
batcher = xnmt.batcher.TrgBatcher(batch_size=3)
train_src, _ = \
batcher.pack(self.src_data, self.trg_data)
self.set_train(True)
for sent_i in range(3):
dy.renew_cg()
src = train_src[sent_i]
self.start_sent(src)
embeddings = model.src_embedder.embed_sent(src)
encodings = model.encoder(embeddings)
if train_src[sent_i].mask is None:
assert encodings.mask is None
else:
np.testing.assert_array_almost_equal(
train_src[sent_i].mask.np_arr, encodings.mask.np_arr)