def test_model_loading(self):
for pretrained_model_name in \
GPT2Tokenizer.available_checkpoints():
tokenizer = GPT2Tokenizer(
pretrained_model_name=pretrained_model_name)
_ = tokenizer.map_text_to_token(
u"Munich and Berlin are nice cities")
def test_add_tokens(self):
tokenizer = GPT2Tokenizer.load(self.tmp_dir.name,
self.special_tokens_map)
vocab_size = tokenizer.vocab_size
all_size = len(tokenizer)
self.assertNotEqual(vocab_size, 0)
self.assertEqual(vocab_size, all_size)
new_toks = ["aaaaabbbbbb", "cccccccccdddddddd"]
added_toks = tokenizer.add_tokens(new_toks)
vocab_size_2 = tokenizer.vocab_size
all_size_2 = len(tokenizer)
self.assertNotEqual(vocab_size_2, 0)
self.assertEqual(vocab_size, vocab_size_2)
self.assertEqual(added_toks, len(new_toks))
self.assertEqual(all_size_2, all_size + len(new_toks))
tokens = tokenizer.map_text_to_id(
"aaaaabbbbbb low cccccccccdddddddd l")
self.assertGreaterEqual(len(tokens), 4)
self.assertGreater(tokens[0], tokenizer.vocab_size - 1)
self.assertGreater(tokens[-2], tokenizer.vocab_size - 1)
new_toks_2 = {
'eos_token': ">>>>|||<||<<|<<",
'pad_token': "<<<<<|||>|>>>>|>"
}
added_toks_2 = tokenizer.add_special_tokens(new_toks_2)
vocab_size_3 = tokenizer.vocab_size
all_size_3 = len(tokenizer)
self.assertNotEqual(vocab_size_3, 0)
self.assertEqual(vocab_size, vocab_size_3)
self.assertEqual(added_toks_2, len(new_toks_2))
self.assertEqual(all_size_3, all_size_2 + len(new_toks_2))
tokens = tokenizer.map_text_to_id(
">>>>|||<||<<|<< aaaaabbbbbb low cccccccccdddddddd "
"<<<<<|||>|>>>>|> l")
self.assertGreaterEqual(len(tokens), 6)
self.assertGreater(tokens[0], tokenizer.vocab_size - 1)
self.assertGreater(tokens[0], tokens[1])
self.assertGreater(tokens[-2], tokenizer.vocab_size - 1)
self.assertGreater(tokens[-2], tokens[-3])
self.assertEqual(tokens[0],
tokenizer.map_token_to_id(tokenizer.eos_token))
self.assertEqual(tokens[-2],
tokenizer.map_token_to_id(tokenizer.pad_token))
def test_tokenize(self):
tokenizer = GPT2Tokenizer.load(self.tmp_dir.name,
self.special_tokens_map)
text = "lower"
bpe_tokens = ["low", "er"]
tokens = tokenizer.map_text_to_token(text)
self.assertListEqual(tokens, bpe_tokens)
input_tokens = tokens + [tokenizer.unk_token]
input_bpe_tokens = [13, 12, 17]
self.assertListEqual(tokenizer.map_token_to_id(input_tokens),
input_bpe_tokens)
def test_save_load(self):
tokenizer = GPT2Tokenizer.load(self.tmp_dir.name,
self.special_tokens_map)
before_tokens = tokenizer.map_text_to_id(
u"He is very happy, UNwant\u00E9d,running")
with tempfile.TemporaryDirectory() as tmpdirname:
tokenizer.save(tmpdirname)
tokenizer = tokenizer.load(tmpdirname)
after_tokens = tokenizer.map_text_to_id(
u"He is very happy, UNwant\u00E9d,running")
self.assertListEqual(before_tokens, after_tokens)
def test_pickle(self):
tokenizer = GPT2Tokenizer.load(self.tmp_dir.name,
self.special_tokens_map)
self.assertIsNotNone(tokenizer)
text = u"Munich and Berlin are nice cities"
subwords = tokenizer.map_text_to_token(text)
with tempfile.TemporaryDirectory() as tmpdirname:
filename = os.path.join(tmpdirname, u"tokenizer.bin")
with open(filename, "wb") as f:
pickle.dump(tokenizer, f)
with open(filename, "rb") as f:
tokenizer_new = pickle.load(f)
subwords_loaded = tokenizer_new.map_text_to_token(text)
self.assertListEqual(subwords, subwords_loaded)
def test_encode_text(self):
tokenizer = GPT2Tokenizer.load(self.tmp_dir.name,
self.special_tokens_map)
text_1 = u"lower newer"
text_1_ids = tokenizer.map_text_to_id(text_1)
input_ids, seq_len = \
tokenizer.encode_text(text=text_1, max_seq_length=10)
bos_token_id = tokenizer.map_token_to_id(tokenizer.bos_token)
eos_token_id = tokenizer.map_token_to_id(tokenizer.eos_token)
pad_token_id = tokenizer.map_token_to_id(tokenizer.pad_token)
self.assertListEqual(input_ids, [bos_token_id] + text_1_ids +
[eos_token_id] + [pad_token_id])
self.assertEqual(seq_len, 9)
def test_encode_decode(self):
tokenizer = GPT2Tokenizer.load(self.tmp_dir.name,
self.special_tokens_map)
input_text = u"lower newer"
output_text = u"lower<unk>newer"
tokens = tokenizer.map_text_to_token(input_text)
ids = tokenizer.map_token_to_id(tokens)
ids_2 = tokenizer.map_text_to_id(input_text)
self.assertListEqual(ids, ids_2)
tokens_2 = tokenizer.map_id_to_token(ids)
text_2 = tokenizer.map_id_to_text(ids)
self.assertEqual(text_2, output_text)
self.assertNotEqual(len(tokens_2), 0)
self.assertIsInstance(text_2, str)