Commit
•
88f79dc
1
Parent(s):
0af0eec
Add missing tokenization_yi.py file
Browse files- tokenization_yi.py +255 -0
tokenization_yi.py
ADDED
@@ -0,0 +1,255 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
+
import os
|
2 |
+
from shutil import copyfile
|
3 |
+
from typing import Any, Dict, List, Optional, Tuple
|
4 |
+
|
5 |
+
import sentencepiece as spm
|
6 |
+
from transformers.tokenization_utils import AddedToken, PreTrainedTokenizer
|
7 |
+
from transformers.utils import logging
|
8 |
+
|
9 |
+
logger = logging.get_logger(__name__)
|
10 |
+
|
11 |
+
VOCAB_FILES_NAMES = {"vocab_file": "tokenizer.model"}
|
12 |
+
|
13 |
+
PRETRAINED_VOCAB_FILES_MAP = {
|
14 |
+
"vocab_file": {},
|
15 |
+
"tokenizer_file": {},
|
16 |
+
}
|
17 |
+
PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES = {}
|
18 |
+
|
19 |
+
|
20 |
+
class YiTokenizer(PreTrainedTokenizer):
|
21 |
+
"""
|
22 |
+
Construct a Yi tokenizer. Based on byte-level Byte-Pair-Encoding.
|
23 |
+
|
24 |
+
Args:
|
25 |
+
vocab_file (`str`):
|
26 |
+
Path to the vocabulary file.
|
27 |
+
"""
|
28 |
+
|
29 |
+
vocab_files_names = VOCAB_FILES_NAMES
|
30 |
+
pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
|
31 |
+
max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
|
32 |
+
model_input_names = ["input_ids", "attention_mask"]
|
33 |
+
|
34 |
+
def __init__(
|
35 |
+
self,
|
36 |
+
vocab_file,
|
37 |
+
unk_token="<unk>",
|
38 |
+
bos_token="<|startoftext|>",
|
39 |
+
eos_token="<|endoftext|>",
|
40 |
+
pad_token="<unk>",
|
41 |
+
sp_model_kwargs: Optional[Dict[str, Any]] = None,
|
42 |
+
add_bos_token=True,
|
43 |
+
add_eos_token=False,
|
44 |
+
clean_up_tokenization_spaces=False,
|
45 |
+
**kwargs,
|
46 |
+
):
|
47 |
+
self.sp_model_kwargs = {} if sp_model_kwargs is None else sp_model_kwargs
|
48 |
+
bos_token = (
|
49 |
+
AddedToken(bos_token, lstrip=False, rstrip=False)
|
50 |
+
if isinstance(bos_token, str)
|
51 |
+
else bos_token
|
52 |
+
)
|
53 |
+
eos_token = (
|
54 |
+
AddedToken(eos_token, lstrip=False, rstrip=False)
|
55 |
+
if isinstance(eos_token, str)
|
56 |
+
else eos_token
|
57 |
+
)
|
58 |
+
unk_token = (
|
59 |
+
AddedToken(unk_token, lstrip=False, rstrip=False)
|
60 |
+
if isinstance(unk_token, str)
|
61 |
+
else unk_token
|
62 |
+
)
|
63 |
+
pad_token = (
|
64 |
+
AddedToken(pad_token, lstrip=False, rstrip=False)
|
65 |
+
if isinstance(pad_token, str)
|
66 |
+
else pad_token
|
67 |
+
)
|
68 |
+
self.vocab_file = vocab_file
|
69 |
+
self.add_bos_token = add_bos_token
|
70 |
+
self.add_eos_token = add_eos_token
|
71 |
+
self.sp_model = spm.SentencePieceProcessor(**self.sp_model_kwargs)
|
72 |
+
self.sp_model.Load(vocab_file)
|
73 |
+
super().__init__(
|
74 |
+
bos_token=bos_token,
|
75 |
+
eos_token=eos_token,
|
76 |
+
unk_token=unk_token,
|
77 |
+
pad_token=pad_token,
|
78 |
+
add_bos_token=add_bos_token,
|
79 |
+
add_eos_token=add_eos_token,
|
80 |
+
sp_model_kwargs=self.sp_model_kwargs,
|
81 |
+
clean_up_tokenization_spaces=clean_up_tokenization_spaces,
|
82 |
+
**kwargs,
|
83 |
+
)
|
84 |
+
|
85 |
+
def __getstate__(self):
|
86 |
+
state = self.__dict__.copy()
|
87 |
+
state["sp_model"] = None
|
88 |
+
return state
|
89 |
+
|
90 |
+
def __setstate__(self, d):
|
91 |
+
self.__dict__ = d
|
92 |
+
self.sp_model = spm.SentencePieceProcessor(**self.sp_model_kwargs)
|
93 |
+
self.sp_model.Load(self.vocab_file)
|
94 |
+
|
95 |
+
@property
|
96 |
+
def vocab_size(self):
|
97 |
+
"""Returns vocab size"""
|
98 |
+
return self.sp_model.get_piece_size()
|
99 |
+
|
100 |
+
def get_vocab(self):
|
101 |
+
"""Returns vocab as a dict"""
|
102 |
+
vocab = {self.convert_ids_to_tokens(i): i for i in range(self.vocab_size)}
|
103 |
+
vocab.update(self.added_tokens_encoder)
|
104 |
+
return vocab
|
105 |
+
|
106 |
+
def _tokenize(self, text):
|
107 |
+
"""Returns a tokenized string."""
|
108 |
+
return self.sp_model.encode(text, out_type=str)
|
109 |
+
|
110 |
+
def _convert_token_to_id(self, token):
|
111 |
+
"""Converts a token (str) in an id using the vocab."""
|
112 |
+
return self.sp_model.piece_to_id(token)
|
113 |
+
|
114 |
+
def _convert_id_to_token(self, index):
|
115 |
+
"""Converts an index (integer) in a token (str) using the vocab."""
|
116 |
+
token = self.sp_model.IdToPiece(index)
|
117 |
+
return token
|
118 |
+
|
119 |
+
def convert_tokens_to_string(self, tokens):
|
120 |
+
"""Converts a sequence of tokens (string) in a single string."""
|
121 |
+
current_sub_tokens = []
|
122 |
+
out_string = ""
|
123 |
+
prev_is_special = False
|
124 |
+
for i, token in enumerate(tokens):
|
125 |
+
# make sure that special tokens are not decoded using sentencepiece model
|
126 |
+
if token in self.all_special_tokens:
|
127 |
+
if not prev_is_special and i != 0:
|
128 |
+
out_string += " "
|
129 |
+
out_string += self.sp_model.decode(current_sub_tokens) + token
|
130 |
+
prev_is_special = True
|
131 |
+
current_sub_tokens = []
|
132 |
+
else:
|
133 |
+
current_sub_tokens.append(token)
|
134 |
+
prev_is_special = False
|
135 |
+
out_string += self.sp_model.decode(current_sub_tokens)
|
136 |
+
return out_string
|
137 |
+
|
138 |
+
def save_vocabulary(
|
139 |
+
self, save_directory, filename_prefix: Optional[str] = None
|
140 |
+
) -> Tuple[str]:
|
141 |
+
"""
|
142 |
+
Save the vocabulary and special tokens file to a directory.
|
143 |
+
|
144 |
+
Args:
|
145 |
+
save_directory (`str`):
|
146 |
+
The directory in which to save the vocabulary.
|
147 |
+
|
148 |
+
Returns:
|
149 |
+
`Tuple(str)`: Paths to the files saved.
|
150 |
+
"""
|
151 |
+
if not os.path.isdir(save_directory):
|
152 |
+
logger.error(f"Vocabulary path ({save_directory}) should be a directory")
|
153 |
+
return
|
154 |
+
out_vocab_file = os.path.join(
|
155 |
+
save_directory,
|
156 |
+
(filename_prefix + "-" if filename_prefix else "")
|
157 |
+
+ VOCAB_FILES_NAMES["vocab_file"],
|
158 |
+
)
|
159 |
+
|
160 |
+
if os.path.abspath(self.vocab_file) != os.path.abspath(
|
161 |
+
out_vocab_file
|
162 |
+
) and os.path.isfile(self.vocab_file):
|
163 |
+
copyfile(self.vocab_file, out_vocab_file)
|
164 |
+
elif not os.path.isfile(self.vocab_file):
|
165 |
+
with open(out_vocab_file, "wb") as fi:
|
166 |
+
content_spiece_model = self.sp_model.serialized_model_proto()
|
167 |
+
fi.write(content_spiece_model)
|
168 |
+
|
169 |
+
return (out_vocab_file,)
|
170 |
+
|
171 |
+
def build_inputs_with_special_tokens(self, token_ids_0, token_ids_1=None):
|
172 |
+
bos_token_id = [self.bos_token_id] if self.add_bos_token else []
|
173 |
+
eos_token_id = [self.eos_token_id] if self.add_eos_token else []
|
174 |
+
|
175 |
+
output = bos_token_id + token_ids_0 + eos_token_id
|
176 |
+
|
177 |
+
if token_ids_1 is not None:
|
178 |
+
output = output + bos_token_id + token_ids_1 + eos_token_id
|
179 |
+
|
180 |
+
return output
|
181 |
+
|
182 |
+
def get_special_tokens_mask(
|
183 |
+
self,
|
184 |
+
token_ids_0: List[int],
|
185 |
+
token_ids_1: Optional[List[int]] = None,
|
186 |
+
already_has_special_tokens: bool = False,
|
187 |
+
) -> List[int]:
|
188 |
+
"""
|
189 |
+
Retrieve sequence ids from a token list that has no special tokens added. This method is called when adding
|
190 |
+
special tokens using the tokenizer `prepare_for_model` method.
|
191 |
+
|
192 |
+
Args:
|
193 |
+
token_ids_0 (`List[int]`):
|
194 |
+
List of IDs.
|
195 |
+
token_ids_1 (`List[int]`, *optional*):
|
196 |
+
Optional second list of IDs for sequence pairs.
|
197 |
+
already_has_special_tokens (`bool`, *optional*, defaults to `False`):
|
198 |
+
Whether or not the token list is already formatted with special tokens for the model.
|
199 |
+
|
200 |
+
Returns:
|
201 |
+
`List[int]`: A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
|
202 |
+
"""
|
203 |
+
if already_has_special_tokens:
|
204 |
+
return super().get_special_tokens_mask(
|
205 |
+
token_ids_0=token_ids_0,
|
206 |
+
token_ids_1=token_ids_1,
|
207 |
+
already_has_special_tokens=True,
|
208 |
+
)
|
209 |
+
|
210 |
+
bos_token_id = [1] if self.add_bos_token else []
|
211 |
+
eos_token_id = [1] if self.add_eos_token else []
|
212 |
+
|
213 |
+
if token_ids_1 is None:
|
214 |
+
return bos_token_id + ([0] * len(token_ids_0)) + eos_token_id
|
215 |
+
return (
|
216 |
+
bos_token_id
|
217 |
+
+ ([0] * len(token_ids_0))
|
218 |
+
+ eos_token_id
|
219 |
+
+ bos_token_id
|
220 |
+
+ ([0] * len(token_ids_1))
|
221 |
+
+ eos_token_id
|
222 |
+
)
|
223 |
+
|
224 |
+
def create_token_type_ids_from_sequences(
|
225 |
+
self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
|
226 |
+
) -> List[int]:
|
227 |
+
"""
|
228 |
+
Creates a mask from the two sequences passed to be used in a sequence-pair classification task. An ALBERT
|
229 |
+
sequence pair mask has the following format:
|
230 |
+
|
231 |
+
```
|
232 |
+
0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
|
233 |
+
| first sequence | second sequence |
|
234 |
+
```
|
235 |
+
|
236 |
+
if token_ids_1 is None, only returns the first portion of the mask (0s).
|
237 |
+
|
238 |
+
Args:
|
239 |
+
token_ids_0 (`List[int]`):
|
240 |
+
List of ids.
|
241 |
+
token_ids_1 (`List[int]`, *optional*):
|
242 |
+
Optional second list of IDs for sequence pairs.
|
243 |
+
|
244 |
+
Returns:
|
245 |
+
`List[int]`: List of [token type IDs](../glossary#token-type-ids) according to the given sequence(s).
|
246 |
+
"""
|
247 |
+
bos_token_id = [self.bos_token_id] if self.add_bos_token else []
|
248 |
+
eos_token_id = [self.eos_token_id] if self.add_eos_token else []
|
249 |
+
|
250 |
+
output = [0] * len(bos_token_id + token_ids_0 + eos_token_id)
|
251 |
+
|
252 |
+
if token_ids_1 is not None:
|
253 |
+
output += [1] * len(bos_token_id + token_ids_1 + eos_token_id)
|
254 |
+
|
255 |
+
return output
|