Upload tokenizer
#2
by
chtan
- opened
- special_tokens_map.json +7 -1
- tokenization_ponet.py +590 -0
- tokenizer_config.json +27 -1
special_tokens_map.json
CHANGED
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@@ -1 +1,7 @@
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-
{
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{
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"cls_token": "[CLS]",
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"mask_token": "[MASK]",
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"pad_token": "[PAD]",
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"sep_token": "[SEP]",
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"unk_token": "[UNK]"
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}
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tokenization_ponet.py
ADDED
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@@ -0,0 +1,590 @@
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| 1 |
+
# coding=utf-8
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| 2 |
+
# Copyright 2023 The Google AI Language Team Authors and The HuggingFace Inc. team.
|
| 3 |
+
#
|
| 4 |
+
# Licensed under the Apache License, Version 2.0 (the "License");
|
| 5 |
+
# you may not use this file except in compliance with the License.
|
| 6 |
+
# You may obtain a copy of the License at
|
| 7 |
+
#
|
| 8 |
+
# http://www.apache.org/licenses/LICENSE-2.0
|
| 9 |
+
#
|
| 10 |
+
# Unless required by applicable law or agreed to in writing, software
|
| 11 |
+
# distributed under the License is distributed on an "AS IS" BASIS,
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| 12 |
+
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
| 13 |
+
# See the License for the specific language governing permissions and
|
| 14 |
+
# limitations under the License.
|
| 15 |
+
"""Tokenization classes for PoNet."""
|
| 16 |
+
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| 17 |
+
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| 18 |
+
import collections
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| 19 |
+
import os
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| 20 |
+
import unicodedata
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| 21 |
+
from typing import Dict, List, Optional, Tuple, Union
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| 22 |
+
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| 23 |
+
from transformers.tokenization_utils import PreTrainedTokenizer, _is_control, _is_punctuation, _is_whitespace
|
| 24 |
+
from transformers.tokenization_utils_base import BatchEncoding, EncodedInput
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| 25 |
+
from transformers.utils import PaddingStrategy, logging
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| 26 |
+
|
| 27 |
+
|
| 28 |
+
logger = logging.get_logger(__name__)
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| 29 |
+
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| 30 |
+
VOCAB_FILES_NAMES = {"vocab_file": "vocab.txt"}
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| 31 |
+
|
| 32 |
+
PRETRAINED_VOCAB_FILES_MAP = {
|
| 33 |
+
"vocab_file": {
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| 34 |
+
"chtan/ponet-base-uncased": "https://huggingface.co/chtan/ponet-base-uncased/resolve/main/vocab.txt",
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| 35 |
+
}
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| 36 |
+
}
|
| 37 |
+
|
| 38 |
+
PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES = {
|
| 39 |
+
"chtan/ponet-base-uncased": 512,
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| 40 |
+
}
|
| 41 |
+
|
| 42 |
+
PRETRAINED_INIT_CONFIGURATION = {
|
| 43 |
+
"chtan/ponet-base-uncased": {"do_lower_case": True},
|
| 44 |
+
}
|
| 45 |
+
|
| 46 |
+
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| 47 |
+
def load_vocab(vocab_file):
|
| 48 |
+
"""Loads a vocabulary file into a dictionary."""
|
| 49 |
+
vocab = collections.OrderedDict()
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| 50 |
+
with open(vocab_file, "r", encoding="utf-8") as reader:
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| 51 |
+
tokens = reader.readlines()
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| 52 |
+
for index, token in enumerate(tokens):
|
| 53 |
+
token = token.rstrip("\n")
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| 54 |
+
vocab[token] = index
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| 55 |
+
return vocab
|
| 56 |
+
|
| 57 |
+
|
| 58 |
+
def whitespace_tokenize(text):
|
| 59 |
+
"""Runs basic whitespace cleaning and splitting on a piece of text."""
|
| 60 |
+
text = text.strip()
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| 61 |
+
if not text:
|
| 62 |
+
return []
|
| 63 |
+
tokens = text.split()
|
| 64 |
+
return tokens
|
| 65 |
+
|
| 66 |
+
|
| 67 |
+
class PoNetTokenizer(PreTrainedTokenizer):
|
| 68 |
+
r"""
|
| 69 |
+
Construct a PONET tokenizer. Based on WordPiece.
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| 70 |
+
|
| 71 |
+
This tokenizer inherits from [`PreTrainedTokenizer`] which contains most of the main methods. Users should refer to
|
| 72 |
+
this superclass for more information regarding those methods.
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| 73 |
+
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| 74 |
+
Args:
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| 75 |
+
vocab_file (`str`):
|
| 76 |
+
File containing the vocabulary.
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| 77 |
+
do_lower_case (`bool`, *optional*, defaults to `True`):
|
| 78 |
+
Whether or not to lowercase the input when tokenizing.
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| 79 |
+
do_basic_tokenize (`bool`, *optional*, defaults to `True`):
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| 80 |
+
Whether or not to do basic tokenization before WordPiece.
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| 81 |
+
never_split (`Iterable`, *optional*):
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| 82 |
+
Collection of tokens which will never be split during tokenization. Only has an effect when
|
| 83 |
+
`do_basic_tokenize=True`
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| 84 |
+
unk_token (`str`, *optional*, defaults to `"[UNK]"`):
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| 85 |
+
The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this
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| 86 |
+
token instead.
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| 87 |
+
sep_token (`str`, *optional*, defaults to `"[SEP]"`):
|
| 88 |
+
The separator token, which is used when building a sequence from multiple sequences, e.g. two sequences for
|
| 89 |
+
sequence classification or for a text and a question for question answering. It is also used as the last
|
| 90 |
+
token of a sequence built with special tokens.
|
| 91 |
+
pad_token (`str`, *optional*, defaults to `"[PAD]"`):
|
| 92 |
+
The token used for padding, for example when batching sequences of different lengths.
|
| 93 |
+
cls_token (`str`, *optional*, defaults to `"[CLS]"`):
|
| 94 |
+
The classifier token which is used when doing sequence classification (classification of the whole sequence
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| 95 |
+
instead of per-token classification). It is the first token of the sequence when built with special tokens.
|
| 96 |
+
mask_token (`str`, *optional*, defaults to `"[MASK]"`):
|
| 97 |
+
The token used for masking values. This is the token used when training this model with masked language
|
| 98 |
+
modeling. This is the token which the model will try to predict.
|
| 99 |
+
tokenize_chinese_chars (`bool`, *optional*, defaults to `True`):
|
| 100 |
+
Whether or not to tokenize Chinese characters.
|
| 101 |
+
|
| 102 |
+
This should likely be deactivated for Japanese (see this
|
| 103 |
+
[issue](https://github.com/huggingface/transformers/issues/328)).
|
| 104 |
+
strip_accents (`bool`, *optional*):
|
| 105 |
+
Whether or not to strip all accents. If this option is not specified, then it will be determined by the
|
| 106 |
+
value for `lowercase` (as in the original PONET).
|
| 107 |
+
"""
|
| 108 |
+
|
| 109 |
+
vocab_files_names = VOCAB_FILES_NAMES
|
| 110 |
+
pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
|
| 111 |
+
pretrained_init_configuration = PRETRAINED_INIT_CONFIGURATION
|
| 112 |
+
max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
|
| 113 |
+
|
| 114 |
+
def __init__(
|
| 115 |
+
self,
|
| 116 |
+
vocab_file,
|
| 117 |
+
do_lower_case=True,
|
| 118 |
+
do_basic_tokenize=True,
|
| 119 |
+
never_split=None,
|
| 120 |
+
unk_token="[UNK]",
|
| 121 |
+
sep_token="[SEP]",
|
| 122 |
+
pad_token="[PAD]",
|
| 123 |
+
cls_token="[CLS]",
|
| 124 |
+
mask_token="[MASK]",
|
| 125 |
+
tokenize_chinese_chars=True,
|
| 126 |
+
strip_accents=None,
|
| 127 |
+
**kwargs,
|
| 128 |
+
):
|
| 129 |
+
super().__init__(
|
| 130 |
+
do_lower_case=do_lower_case,
|
| 131 |
+
do_basic_tokenize=do_basic_tokenize,
|
| 132 |
+
never_split=never_split,
|
| 133 |
+
unk_token=unk_token,
|
| 134 |
+
sep_token=sep_token,
|
| 135 |
+
pad_token=pad_token,
|
| 136 |
+
cls_token=cls_token,
|
| 137 |
+
mask_token=mask_token,
|
| 138 |
+
tokenize_chinese_chars=tokenize_chinese_chars,
|
| 139 |
+
strip_accents=strip_accents,
|
| 140 |
+
**kwargs,
|
| 141 |
+
)
|
| 142 |
+
|
| 143 |
+
if not os.path.isfile(vocab_file):
|
| 144 |
+
raise ValueError(
|
| 145 |
+
f"Can't find a vocabulary file at path '{vocab_file}'. To load the vocabulary from a Google pretrained"
|
| 146 |
+
" model use `tokenizer = PoNetTokenizer.from_pretrained(PRETRAINED_MODEL_NAME)`"
|
| 147 |
+
)
|
| 148 |
+
self.vocab = load_vocab(vocab_file)
|
| 149 |
+
self.ids_to_tokens = collections.OrderedDict([(ids, tok) for tok, ids in self.vocab.items()])
|
| 150 |
+
self.do_basic_tokenize = do_basic_tokenize
|
| 151 |
+
if do_basic_tokenize:
|
| 152 |
+
self.basic_tokenizer = BasicTokenizer(
|
| 153 |
+
do_lower_case=do_lower_case,
|
| 154 |
+
never_split=never_split,
|
| 155 |
+
tokenize_chinese_chars=tokenize_chinese_chars,
|
| 156 |
+
strip_accents=strip_accents,
|
| 157 |
+
)
|
| 158 |
+
self.wordpiece_tokenizer = WordpieceTokenizer(vocab=self.vocab, unk_token=self.unk_token)
|
| 159 |
+
|
| 160 |
+
def _pad(
|
| 161 |
+
self,
|
| 162 |
+
encoded_inputs: Union[Dict[str, EncodedInput], BatchEncoding],
|
| 163 |
+
max_length: Optional[int] = None,
|
| 164 |
+
padding_strategy: PaddingStrategy = PaddingStrategy.DO_NOT_PAD,
|
| 165 |
+
pad_to_multiple_of: Optional[int] = None,
|
| 166 |
+
return_attention_mask: Optional[bool] = None,
|
| 167 |
+
) -> dict:
|
| 168 |
+
"""
|
| 169 |
+
Pad encoded inputs (on left/right and up to predefined length or max length in the batch)
|
| 170 |
+
|
| 171 |
+
Args:
|
| 172 |
+
encoded_inputs:
|
| 173 |
+
Dictionary of tokenized inputs (`List[int]`) or batch of tokenized inputs (`List[List[int]]`).
|
| 174 |
+
max_length: maximum length of the returned list and optionally padding length (see below).
|
| 175 |
+
Will truncate by taking into account the special tokens.
|
| 176 |
+
padding_strategy: PaddingStrategy to use for padding.
|
| 177 |
+
|
| 178 |
+
- PaddingStrategy.LONGEST Pad to the longest sequence in the batch
|
| 179 |
+
- PaddingStrategy.MAX_LENGTH: Pad to the max length (default)
|
| 180 |
+
- PaddingStrategy.DO_NOT_PAD: Do not pad
|
| 181 |
+
The tokenizer padding sides are defined in self.padding_side:
|
| 182 |
+
|
| 183 |
+
- 'left': pads on the left of the sequences
|
| 184 |
+
- 'right': pads on the right of the sequences
|
| 185 |
+
pad_to_multiple_of: (optional) Integer if set will pad the sequence to a multiple of the provided value.
|
| 186 |
+
This is especially useful to enable the use of Tensor Core on NVIDIA hardware with compute capability
|
| 187 |
+
`>= 7.5` (Volta).
|
| 188 |
+
return_attention_mask:
|
| 189 |
+
(optional) Set to False to avoid returning attention mask (default: set to model specifics)
|
| 190 |
+
"""
|
| 191 |
+
# Load from model defaults
|
| 192 |
+
if return_attention_mask is None:
|
| 193 |
+
return_attention_mask = "attention_mask" in self.model_input_names
|
| 194 |
+
|
| 195 |
+
required_input = encoded_inputs[self.model_input_names[0]]
|
| 196 |
+
|
| 197 |
+
if padding_strategy == PaddingStrategy.LONGEST:
|
| 198 |
+
max_length = len(required_input)
|
| 199 |
+
|
| 200 |
+
if max_length is not None and pad_to_multiple_of is not None and (max_length % pad_to_multiple_of != 0):
|
| 201 |
+
max_length = ((max_length // pad_to_multiple_of) + 1) * pad_to_multiple_of
|
| 202 |
+
|
| 203 |
+
needs_to_be_padded = padding_strategy != PaddingStrategy.DO_NOT_PAD and len(required_input) != max_length
|
| 204 |
+
|
| 205 |
+
# Initialize attention mask if not present.
|
| 206 |
+
if return_attention_mask and "attention_mask" not in encoded_inputs:
|
| 207 |
+
encoded_inputs["attention_mask"] = [1] * len(required_input)
|
| 208 |
+
|
| 209 |
+
if needs_to_be_padded:
|
| 210 |
+
difference = max_length - len(required_input)
|
| 211 |
+
|
| 212 |
+
if self.padding_side == "right":
|
| 213 |
+
if return_attention_mask:
|
| 214 |
+
encoded_inputs["attention_mask"] = encoded_inputs["attention_mask"] + [0] * difference
|
| 215 |
+
if "token_type_ids" in encoded_inputs:
|
| 216 |
+
encoded_inputs["token_type_ids"] = (
|
| 217 |
+
encoded_inputs["token_type_ids"] + [self.pad_token_type_id] * difference
|
| 218 |
+
)
|
| 219 |
+
if "segment_ids" in encoded_inputs:
|
| 220 |
+
encoded_inputs["segment_ids"] = (
|
| 221 |
+
encoded_inputs["segment_ids"] + [encoded_inputs["segment_ids"][-1] + 1] * difference
|
| 222 |
+
)
|
| 223 |
+
if "special_tokens_mask" in encoded_inputs:
|
| 224 |
+
encoded_inputs["special_tokens_mask"] = encoded_inputs["special_tokens_mask"] + [1] * difference
|
| 225 |
+
encoded_inputs[self.model_input_names[0]] = required_input + [self.pad_token_id] * difference
|
| 226 |
+
elif self.padding_side == "left":
|
| 227 |
+
if return_attention_mask:
|
| 228 |
+
encoded_inputs["attention_mask"] = [0] * difference + encoded_inputs["attention_mask"]
|
| 229 |
+
if "token_type_ids" in encoded_inputs:
|
| 230 |
+
encoded_inputs["token_type_ids"] = [self.pad_token_type_id] * difference + encoded_inputs[
|
| 231 |
+
"token_type_ids"
|
| 232 |
+
]
|
| 233 |
+
if "segment_ids" in encoded_inputs:
|
| 234 |
+
encoded_inputs["segment_ids"] = [
|
| 235 |
+
encoded_inputs["segment_ids"][-1] + 1
|
| 236 |
+
] * difference + encoded_inputs["segment_ids"]
|
| 237 |
+
if "special_tokens_mask" in encoded_inputs:
|
| 238 |
+
encoded_inputs["special_tokens_mask"] = [1] * difference + encoded_inputs["special_tokens_mask"]
|
| 239 |
+
encoded_inputs[self.model_input_names[0]] = [self.pad_token_id] * difference + required_input
|
| 240 |
+
else:
|
| 241 |
+
raise ValueError("Invalid padding strategy:" + str(self.padding_side))
|
| 242 |
+
|
| 243 |
+
return encoded_inputs
|
| 244 |
+
|
| 245 |
+
@property
|
| 246 |
+
def do_lower_case(self):
|
| 247 |
+
return self.basic_tokenizer.do_lower_case
|
| 248 |
+
|
| 249 |
+
@property
|
| 250 |
+
def vocab_size(self):
|
| 251 |
+
return len(self.vocab)
|
| 252 |
+
|
| 253 |
+
def get_vocab(self):
|
| 254 |
+
return dict(self.vocab, **self.added_tokens_encoder)
|
| 255 |
+
|
| 256 |
+
def _tokenize(self, text):
|
| 257 |
+
split_tokens = []
|
| 258 |
+
if self.do_basic_tokenize:
|
| 259 |
+
for token in self.basic_tokenizer.tokenize(text, never_split=self.all_special_tokens):
|
| 260 |
+
# If the token is part of the never_split set
|
| 261 |
+
if token in self.basic_tokenizer.never_split:
|
| 262 |
+
split_tokens.append(token)
|
| 263 |
+
else:
|
| 264 |
+
split_tokens += self.wordpiece_tokenizer.tokenize(token)
|
| 265 |
+
else:
|
| 266 |
+
split_tokens = self.wordpiece_tokenizer.tokenize(text)
|
| 267 |
+
return split_tokens
|
| 268 |
+
|
| 269 |
+
def _convert_token_to_id(self, token):
|
| 270 |
+
"""Converts a token (str) in an id using the vocab."""
|
| 271 |
+
return self.vocab.get(token, self.vocab.get(self.unk_token))
|
| 272 |
+
|
| 273 |
+
def _convert_id_to_token(self, index):
|
| 274 |
+
"""Converts an index (integer) in a token (str) using the vocab."""
|
| 275 |
+
return self.ids_to_tokens.get(index, self.unk_token)
|
| 276 |
+
|
| 277 |
+
def convert_tokens_to_string(self, tokens):
|
| 278 |
+
"""Converts a sequence of tokens (string) in a single string."""
|
| 279 |
+
out_string = " ".join(tokens).replace(" ##", "").strip()
|
| 280 |
+
return out_string
|
| 281 |
+
|
| 282 |
+
def build_inputs_with_special_tokens(
|
| 283 |
+
self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
|
| 284 |
+
) -> List[int]:
|
| 285 |
+
"""
|
| 286 |
+
Build model inputs from a sequence or a pair of sequence for sequence classification tasks by concatenating and
|
| 287 |
+
adding special tokens. A PONET sequence has the following format:
|
| 288 |
+
|
| 289 |
+
- single sequence: `[CLS] X [SEP]`
|
| 290 |
+
- pair of sequences: `[CLS] A [SEP] B [SEP]`
|
| 291 |
+
|
| 292 |
+
Args:
|
| 293 |
+
token_ids_0 (`List[int]`):
|
| 294 |
+
List of IDs to which the special tokens will be added.
|
| 295 |
+
token_ids_1 (`List[int]`, *optional*):
|
| 296 |
+
Optional second list of IDs for sequence pairs.
|
| 297 |
+
|
| 298 |
+
Returns:
|
| 299 |
+
`List[int]`: List of [input IDs](../glossary#input-ids) with the appropriate special tokens.
|
| 300 |
+
"""
|
| 301 |
+
if token_ids_1 is None:
|
| 302 |
+
return [self.cls_token_id] + token_ids_0 + [self.sep_token_id]
|
| 303 |
+
cls = [self.cls_token_id]
|
| 304 |
+
sep = [self.sep_token_id]
|
| 305 |
+
return cls + token_ids_0 + sep + token_ids_1 + sep
|
| 306 |
+
|
| 307 |
+
def get_special_tokens_mask(
|
| 308 |
+
self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None, already_has_special_tokens: bool = False
|
| 309 |
+
) -> List[int]:
|
| 310 |
+
"""
|
| 311 |
+
Retrieve sequence ids from a token list that has no special tokens added. This method is called when adding
|
| 312 |
+
special tokens using the tokenizer `prepare_for_model` method.
|
| 313 |
+
|
| 314 |
+
Args:
|
| 315 |
+
token_ids_0 (`List[int]`):
|
| 316 |
+
List of IDs.
|
| 317 |
+
token_ids_1 (`List[int]`, *optional*):
|
| 318 |
+
Optional second list of IDs for sequence pairs.
|
| 319 |
+
already_has_special_tokens (`bool`, *optional*, defaults to `False`):
|
| 320 |
+
Whether or not the token list is already formatted with special tokens for the model.
|
| 321 |
+
|
| 322 |
+
Returns:
|
| 323 |
+
`List[int]`: A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
|
| 324 |
+
"""
|
| 325 |
+
|
| 326 |
+
if already_has_special_tokens:
|
| 327 |
+
return super().get_special_tokens_mask(
|
| 328 |
+
token_ids_0=token_ids_0, token_ids_1=token_ids_1, already_has_special_tokens=True
|
| 329 |
+
)
|
| 330 |
+
|
| 331 |
+
if token_ids_1 is not None:
|
| 332 |
+
return [1] + ([0] * len(token_ids_0)) + [1] + ([0] * len(token_ids_1)) + [1]
|
| 333 |
+
return [1] + ([0] * len(token_ids_0)) + [1]
|
| 334 |
+
|
| 335 |
+
def create_token_type_ids_from_sequences(
|
| 336 |
+
self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
|
| 337 |
+
) -> List[int]:
|
| 338 |
+
"""
|
| 339 |
+
Create a mask from the two sequences passed to be used in a sequence-pair classification task. A PONET sequence
|
| 340 |
+
pair mask has the following format:
|
| 341 |
+
|
| 342 |
+
```
|
| 343 |
+
0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
|
| 344 |
+
| first sequence | second sequence |
|
| 345 |
+
```
|
| 346 |
+
|
| 347 |
+
If `token_ids_1` is `None`, this method only returns the first portion of the mask (0s).
|
| 348 |
+
|
| 349 |
+
Args:
|
| 350 |
+
token_ids_0 (`List[int]`):
|
| 351 |
+
List of IDs.
|
| 352 |
+
token_ids_1 (`List[int]`, *optional*):
|
| 353 |
+
Optional second list of IDs for sequence pairs.
|
| 354 |
+
|
| 355 |
+
Returns:
|
| 356 |
+
`List[int]`: List of [token type IDs](../glossary#token-type-ids) according to the given sequence(s).
|
| 357 |
+
"""
|
| 358 |
+
sep = [self.sep_token_id]
|
| 359 |
+
cls = [self.cls_token_id]
|
| 360 |
+
if token_ids_1 is None:
|
| 361 |
+
return len(cls + token_ids_0 + sep) * [0]
|
| 362 |
+
return len(cls + token_ids_0 + sep) * [0] + len(token_ids_1 + sep) * [1]
|
| 363 |
+
|
| 364 |
+
def save_vocabulary(self, save_directory: str, filename_prefix: Optional[str] = None) -> Tuple[str]:
|
| 365 |
+
index = 0
|
| 366 |
+
if os.path.isdir(save_directory):
|
| 367 |
+
vocab_file = os.path.join(
|
| 368 |
+
save_directory, (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"]
|
| 369 |
+
)
|
| 370 |
+
else:
|
| 371 |
+
vocab_file = (filename_prefix + "-" if filename_prefix else "") + save_directory
|
| 372 |
+
with open(vocab_file, "w", encoding="utf-8") as writer:
|
| 373 |
+
for token, token_index in sorted(self.vocab.items(), key=lambda kv: kv[1]):
|
| 374 |
+
if index != token_index:
|
| 375 |
+
logger.warning(
|
| 376 |
+
f"Saving vocabulary to {vocab_file}: vocabulary indices are not consecutive."
|
| 377 |
+
" Please check that the vocabulary is not corrupted!"
|
| 378 |
+
)
|
| 379 |
+
index = token_index
|
| 380 |
+
writer.write(token + "\n")
|
| 381 |
+
index += 1
|
| 382 |
+
return (vocab_file,)
|
| 383 |
+
|
| 384 |
+
|
| 385 |
+
# Copied from transformers.models.bert.tokenization_bert.BasicTokenizer with Bert->PoNet
|
| 386 |
+
class BasicTokenizer(object):
|
| 387 |
+
"""
|
| 388 |
+
Constructs a BasicTokenizer that will run basic tokenization (punctuation splitting, lower casing, etc.).
|
| 389 |
+
|
| 390 |
+
Args:
|
| 391 |
+
do_lower_case (`bool`, *optional*, defaults to `True`):
|
| 392 |
+
Whether or not to lowercase the input when tokenizing.
|
| 393 |
+
never_split (`Iterable`, *optional*):
|
| 394 |
+
Collection of tokens which will never be split during tokenization. Only has an effect when
|
| 395 |
+
`do_basic_tokenize=True`
|
| 396 |
+
tokenize_chinese_chars (`bool`, *optional*, defaults to `True`):
|
| 397 |
+
Whether or not to tokenize Chinese characters.
|
| 398 |
+
|
| 399 |
+
This should likely be deactivated for Japanese (see this
|
| 400 |
+
[issue](https://github.com/huggingface/transformers/issues/328)).
|
| 401 |
+
strip_accents (`bool`, *optional*):
|
| 402 |
+
Whether or not to strip all accents. If this option is not specified, then it will be determined by the
|
| 403 |
+
value for `lowercase` (as in the original BERT).
|
| 404 |
+
"""
|
| 405 |
+
|
| 406 |
+
def __init__(self, do_lower_case=True, never_split=None, tokenize_chinese_chars=True, strip_accents=None):
|
| 407 |
+
if never_split is None:
|
| 408 |
+
never_split = []
|
| 409 |
+
self.do_lower_case = do_lower_case
|
| 410 |
+
self.never_split = set(never_split)
|
| 411 |
+
self.tokenize_chinese_chars = tokenize_chinese_chars
|
| 412 |
+
self.strip_accents = strip_accents
|
| 413 |
+
|
| 414 |
+
def tokenize(self, text, never_split=None):
|
| 415 |
+
"""
|
| 416 |
+
Basic Tokenization of a piece of text. Split on "white spaces" only, for sub-word tokenization, see
|
| 417 |
+
WordPieceTokenizer.
|
| 418 |
+
|
| 419 |
+
Args:
|
| 420 |
+
never_split (`List[str]`, *optional*)
|
| 421 |
+
Kept for backward compatibility purposes. Now implemented directly at the base class level (see
|
| 422 |
+
[`PreTrainedTokenizer.tokenize`]) List of token not to split.
|
| 423 |
+
"""
|
| 424 |
+
# union() returns a new set by concatenating the two sets.
|
| 425 |
+
never_split = self.never_split.union(set(never_split)) if never_split else self.never_split
|
| 426 |
+
text = self._clean_text(text)
|
| 427 |
+
|
| 428 |
+
# This was added on November 1st, 2018 for the multilingual and Chinese
|
| 429 |
+
# models. This is also applied to the English models now, but it doesn't
|
| 430 |
+
# matter since the English models were not trained on any Chinese data
|
| 431 |
+
# and generally don't have any Chinese data in them (there are Chinese
|
| 432 |
+
# characters in the vocabulary because Wikipedia does have some Chinese
|
| 433 |
+
# words in the English Wikipedia.).
|
| 434 |
+
if self.tokenize_chinese_chars:
|
| 435 |
+
text = self._tokenize_chinese_chars(text)
|
| 436 |
+
orig_tokens = whitespace_tokenize(text)
|
| 437 |
+
split_tokens = []
|
| 438 |
+
for token in orig_tokens:
|
| 439 |
+
if token not in never_split:
|
| 440 |
+
if self.do_lower_case:
|
| 441 |
+
token = token.lower()
|
| 442 |
+
if self.strip_accents is not False:
|
| 443 |
+
token = self._run_strip_accents(token)
|
| 444 |
+
elif self.strip_accents:
|
| 445 |
+
token = self._run_strip_accents(token)
|
| 446 |
+
split_tokens.extend(self._run_split_on_punc(token, never_split))
|
| 447 |
+
|
| 448 |
+
output_tokens = whitespace_tokenize(" ".join(split_tokens))
|
| 449 |
+
return output_tokens
|
| 450 |
+
|
| 451 |
+
def _run_strip_accents(self, text):
|
| 452 |
+
"""Strips accents from a piece of text."""
|
| 453 |
+
text = unicodedata.normalize("NFD", text)
|
| 454 |
+
output = []
|
| 455 |
+
for char in text:
|
| 456 |
+
cat = unicodedata.category(char)
|
| 457 |
+
if cat == "Mn":
|
| 458 |
+
continue
|
| 459 |
+
output.append(char)
|
| 460 |
+
return "".join(output)
|
| 461 |
+
|
| 462 |
+
def _run_split_on_punc(self, text, never_split=None):
|
| 463 |
+
"""Splits punctuation on a piece of text."""
|
| 464 |
+
if never_split is not None and text in never_split:
|
| 465 |
+
return [text]
|
| 466 |
+
chars = list(text)
|
| 467 |
+
i = 0
|
| 468 |
+
start_new_word = True
|
| 469 |
+
output = []
|
| 470 |
+
while i < len(chars):
|
| 471 |
+
char = chars[i]
|
| 472 |
+
if _is_punctuation(char):
|
| 473 |
+
output.append([char])
|
| 474 |
+
start_new_word = True
|
| 475 |
+
else:
|
| 476 |
+
if start_new_word:
|
| 477 |
+
output.append([])
|
| 478 |
+
start_new_word = False
|
| 479 |
+
output[-1].append(char)
|
| 480 |
+
i += 1
|
| 481 |
+
|
| 482 |
+
return ["".join(x) for x in output]
|
| 483 |
+
|
| 484 |
+
def _tokenize_chinese_chars(self, text):
|
| 485 |
+
"""Adds whitespace around any CJK character."""
|
| 486 |
+
output = []
|
| 487 |
+
for char in text:
|
| 488 |
+
cp = ord(char)
|
| 489 |
+
if self._is_chinese_char(cp):
|
| 490 |
+
output.append(" ")
|
| 491 |
+
output.append(char)
|
| 492 |
+
output.append(" ")
|
| 493 |
+
else:
|
| 494 |
+
output.append(char)
|
| 495 |
+
return "".join(output)
|
| 496 |
+
|
| 497 |
+
def _is_chinese_char(self, cp):
|
| 498 |
+
"""Checks whether CP is the codepoint of a CJK character."""
|
| 499 |
+
# This defines a "chinese character" as anything in the CJK Unicode block:
|
| 500 |
+
# https://en.wikipedia.org/wiki/CJK_Unified_Ideographs_(Unicode_block)
|
| 501 |
+
#
|
| 502 |
+
# Note that the CJK Unicode block is NOT all Japanese and Korean characters,
|
| 503 |
+
# despite its name. The modern Korean Hangul alphabet is a different block,
|
| 504 |
+
# as is Japanese Hiragana and Katakana. Those alphabets are used to write
|
| 505 |
+
# space-separated words, so they are not treated specially and handled
|
| 506 |
+
# like the all of the other languages.
|
| 507 |
+
if (
|
| 508 |
+
(cp >= 0x4E00 and cp <= 0x9FFF)
|
| 509 |
+
or (cp >= 0x3400 and cp <= 0x4DBF) #
|
| 510 |
+
or (cp >= 0x20000 and cp <= 0x2A6DF) #
|
| 511 |
+
or (cp >= 0x2A700 and cp <= 0x2B73F) #
|
| 512 |
+
or (cp >= 0x2B740 and cp <= 0x2B81F) #
|
| 513 |
+
or (cp >= 0x2B820 and cp <= 0x2CEAF) #
|
| 514 |
+
or (cp >= 0xF900 and cp <= 0xFAFF)
|
| 515 |
+
or (cp >= 0x2F800 and cp <= 0x2FA1F) #
|
| 516 |
+
): #
|
| 517 |
+
return True
|
| 518 |
+
|
| 519 |
+
return False
|
| 520 |
+
|
| 521 |
+
def _clean_text(self, text):
|
| 522 |
+
"""Performs invalid character removal and whitespace cleanup on text."""
|
| 523 |
+
output = []
|
| 524 |
+
for char in text:
|
| 525 |
+
cp = ord(char)
|
| 526 |
+
if cp == 0 or cp == 0xFFFD or _is_control(char):
|
| 527 |
+
continue
|
| 528 |
+
if _is_whitespace(char):
|
| 529 |
+
output.append(" ")
|
| 530 |
+
else:
|
| 531 |
+
output.append(char)
|
| 532 |
+
return "".join(output)
|
| 533 |
+
|
| 534 |
+
|
| 535 |
+
# Copied from transformers.models.bert.tokenization_bert.WordpieceTokenizer with Bert->PoNet
|
| 536 |
+
class WordpieceTokenizer(object):
|
| 537 |
+
"""Runs WordPiece tokenization."""
|
| 538 |
+
|
| 539 |
+
def __init__(self, vocab, unk_token, max_input_chars_per_word=100):
|
| 540 |
+
self.vocab = vocab
|
| 541 |
+
self.unk_token = unk_token
|
| 542 |
+
self.max_input_chars_per_word = max_input_chars_per_word
|
| 543 |
+
|
| 544 |
+
def tokenize(self, text):
|
| 545 |
+
"""
|
| 546 |
+
Tokenizes a piece of text into its word pieces. This uses a greedy longest-match-first algorithm to perform
|
| 547 |
+
tokenization using the given vocabulary.
|
| 548 |
+
|
| 549 |
+
For example, `input = "unaffable"` wil return as output `["un", "##aff", "##able"]`.
|
| 550 |
+
|
| 551 |
+
Args:
|
| 552 |
+
text: A single token or whitespace separated tokens. This should have
|
| 553 |
+
already been passed through *BasicTokenizer*.
|
| 554 |
+
|
| 555 |
+
Returns:
|
| 556 |
+
A list of wordpiece tokens.
|
| 557 |
+
"""
|
| 558 |
+
|
| 559 |
+
output_tokens = []
|
| 560 |
+
for token in whitespace_tokenize(text):
|
| 561 |
+
chars = list(token)
|
| 562 |
+
if len(chars) > self.max_input_chars_per_word:
|
| 563 |
+
output_tokens.append(self.unk_token)
|
| 564 |
+
continue
|
| 565 |
+
|
| 566 |
+
is_bad = False
|
| 567 |
+
start = 0
|
| 568 |
+
sub_tokens = []
|
| 569 |
+
while start < len(chars):
|
| 570 |
+
end = len(chars)
|
| 571 |
+
cur_substr = None
|
| 572 |
+
while start < end:
|
| 573 |
+
substr = "".join(chars[start:end])
|
| 574 |
+
if start > 0:
|
| 575 |
+
substr = "##" + substr
|
| 576 |
+
if substr in self.vocab:
|
| 577 |
+
cur_substr = substr
|
| 578 |
+
break
|
| 579 |
+
end -= 1
|
| 580 |
+
if cur_substr is None:
|
| 581 |
+
is_bad = True
|
| 582 |
+
break
|
| 583 |
+
sub_tokens.append(cur_substr)
|
| 584 |
+
start = end
|
| 585 |
+
|
| 586 |
+
if is_bad:
|
| 587 |
+
output_tokens.append(self.unk_token)
|
| 588 |
+
else:
|
| 589 |
+
output_tokens.extend(sub_tokens)
|
| 590 |
+
return output_tokens
|
tokenizer_config.json
CHANGED
|
@@ -1 +1,27 @@
|
|
| 1 |
-
{
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
{
|
| 2 |
+
"auto_map": {
|
| 3 |
+
"AutoTokenizer": [
|
| 4 |
+
"tokenization_ponet.PoNetTokenizer",
|
| 5 |
+
null
|
| 6 |
+
]
|
| 7 |
+
},
|
| 8 |
+
"cls_token": "[CLS]",
|
| 9 |
+
"do_basic_tokenize": true,
|
| 10 |
+
"do_lower_case": true,
|
| 11 |
+
"mask_token": "[MASK]",
|
| 12 |
+
"model_input_names": [
|
| 13 |
+
"input_ids",
|
| 14 |
+
"token_type_ids",
|
| 15 |
+
"attention_mask",
|
| 16 |
+
"segment_ids"
|
| 17 |
+
],
|
| 18 |
+
"model_max_length": 512,
|
| 19 |
+
"never_split": null,
|
| 20 |
+
"pad_token": "[PAD]",
|
| 21 |
+
"sep_token": "[SEP]",
|
| 22 |
+
"special_tokens_map_file": null,
|
| 23 |
+
"strip_accents": null,
|
| 24 |
+
"tokenize_chinese_chars": true,
|
| 25 |
+
"tokenizer_class": "PoNetTokenizer",
|
| 26 |
+
"unk_token": "[UNK]"
|
| 27 |
+
}
|