Delete NumBertTokenizer.py

NumBertTokenizer.py

@@ -1,484 +0,0 @@
-import collections
-import os
-import unicodedata
-from typing import List, Optional, Tuple
-
-from transformers.models.bert.tokenization_bert import VOCAB_FILES_NAMES, PRETRAINED_VOCAB_FILES_MAP, \
-    PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES, PRETRAINED_INIT_CONFIGURATION, load_vocab, BasicTokenizer, \
-    whitespace_tokenize,_is_whitespace,_is_control,_is_punctuation
-from transformers.tokenization_utils import PreTrainedTokenizer
-from transformers.utils import logging
-
-logger = logging.get_logger(__name__)
-
-
-class NumBertTokenizer(PreTrainedTokenizer):
-    r"""
-    Construct a BERT tokenizer. Based on WordPiece.
-
-    This tokenizer inherits from :class:`~transformers.PreTrainedTokenizer` which contains most of the main methods.
-    Users should refer to this superclass for more information regarding those methods.
-
-    Args:
-        vocab_file (:obj:`str`):
-            File containing the vocabulary.
-        do_lower_case (:obj:`bool`, `optional`, defaults to :obj:`True`):
-            Whether or not to lowercase the input when tokenizing.
-        do_basic_tokenize (:obj:`bool`, `optional`, defaults to :obj:`True`):
-            Whether or not to do basic tokenization before WordPiece.
-        never_split (:obj:`Iterable`, `optional`):
-            Collection of tokens which will never be split during tokenization. Only has an effect when
-            :obj:`do_basic_tokenize=True`
-        unk_token (:obj:`str`, `optional`, defaults to :obj:`"[UNK]"`):
-            The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this
-            token instead.
-        sep_token (:obj:`str`, `optional`, defaults to :obj:`"[SEP]"`):
-            The separator token, which is used when building a sequence from multiple sequences, e.g. two sequences for
-            sequence classification or for a text and a question for question answering. It is also used as the last
-            token of a sequence built with special tokens.
-        pad_token (:obj:`str`, `optional`, defaults to :obj:`"[PAD]"`):
-            The token used for padding, for example when batching sequences of different lengths.
-        cls_token (:obj:`str`, `optional`, defaults to :obj:`"[CLS]"`):
-            The classifier token which is used when doing sequence classification (classification of the whole sequence
-            instead of per-token classification). It is the first token of the sequence when built with special tokens.
-        mask_token (:obj:`str`, `optional`, defaults to :obj:`"[MASK]"`):
-            The token used for masking values. This is the token used when training this model with masked language
-            modeling. This is the token which the model will try to predict.
-        tokenize_chinese_chars (:obj:`bool`, `optional`, defaults to :obj:`True`):
-            Whether or not to tokenize Chinese characters.
-
-            This should likely be deactivated for Japanese (see this `issue
-            <https://github.com/huggingface/transformers/issues/328>`__).
-        strip_accents: (:obj:`bool`, `optional`):
-            Whether or not to strip all accents. If this option is not specified, then it will be determined by the
-            value for :obj:`lowercase` (as in the original BERT).
-    """
-
-    vocab_files_names = VOCAB_FILES_NAMES
-    pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
-    pretrained_init_configuration = PRETRAINED_INIT_CONFIGURATION
-    max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
-
-    def __init__(
-            self,
-            vocab_file,
-            do_lower_case=True,
-            do_basic_tokenize=True,
-            never_split=None,
-            unk_token="[UNK]",
-            sep_token="[SEP]",
-            pad_token="[PAD]",
-            cls_token="[CLS]",
-            mask_token="[MASK]",
-            tokenize_chinese_chars=True,
-            strip_accents=None,
-            **kwargs
-    ):
-        super().__init__(
-            do_lower_case=do_lower_case,
-            do_basic_tokenize=do_basic_tokenize,
-            never_split=never_split,
-            unk_token=unk_token,
-            sep_token=sep_token,
-            pad_token=pad_token,
-            cls_token=cls_token,
-            mask_token=mask_token,
-            tokenize_chinese_chars=tokenize_chinese_chars,
-            strip_accents=strip_accents,
-            **kwargs,
-        )
-
-        if not os.path.isfile(vocab_file):
-            raise ValueError(
-                "Can't find a vocabulary file at path '{}'. To load the vocabulary from a Google pretrained "
-                "model use `tokenizer = BertTokenizer.from_pretrained(PRETRAINED_MODEL_NAME)`".format(vocab_file)
-            )
-        self.vocab = load_vocab(vocab_file)
-        self.ids_to_tokens = collections.OrderedDict([(ids, tok) for tok, ids in self.vocab.items()])
-        self.do_basic_tokenize = do_basic_tokenize
-        if do_basic_tokenize:
-            self.basic_tokenizer = NumBERTBasicTokenizer(
-                do_lower_case=do_lower_case,
-                never_split=never_split,
-                tokenize_chinese_chars=tokenize_chinese_chars,
-                strip_accents=strip_accents,
-            )
-        self.wordpiece_tokenizer = NumberWordpieceTokenizer(vocab=self.vocab, unk_token=self.unk_token)
-
-    @property
-    def do_lower_case(self):
-        return self.basic_tokenizer.do_lower_case
-
-    @property
-    def vocab_size(self):
-        return len(self.vocab)
-
-    def get_vocab(self):
-        return dict(self.vocab, **self.added_tokens_encoder)
-
-    def _tokenize(self, text):
-        split_tokens = []
-        if self.do_basic_tokenize:
-            for token in self.basic_tokenizer.tokenize(text, never_split=self.all_special_tokens):
-
-                # If the token is part of the never_split set
-                if token in self.basic_tokenizer.never_split:
-                    split_tokens.append(token)
-                else:
-                    split_tokens += self.wordpiece_tokenizer.tokenize(token)
-        else:
-            split_tokens = self.wordpiece_tokenizer.tokenize(text)
-        return split_tokens
-
-    def _convert_token_to_id(self, token):
-        """ Converts a token (str) in an id using the vocab. """
-        return self.vocab.get(token, self.vocab.get(self.unk_token))
-
-    def _convert_id_to_token(self, index):
-        """Converts an index (integer) in a token (str) using the vocab."""
-        return self.ids_to_tokens.get(index, self.unk_token)
-
-    def convert_tokens_to_string(self, tokens):
-        """ Converts a sequence of tokens (string) in a single string. """
-        out_string = " ".join(tokens).replace(" ##", "").strip()
-        return out_string
-
-    def build_inputs_with_special_tokens(
-            self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
-    ) -> List[int]:
-        """
-        Build model inputs from a sequence or a pair of sequence for sequence classification tasks by concatenating and
-        adding special tokens. A BERT sequence has the following format:
-
-        - single sequence: ``[CLS] X [SEP]``
-        - pair of sequences: ``[CLS] A [SEP] B [SEP]``
-
-        Args:
-            token_ids_0 (:obj:`List[int]`):
-                List of IDs to which the special tokens will be added.
-            token_ids_1 (:obj:`List[int]`, `optional`):
-                Optional second list of IDs for sequence pairs.
-
-        Returns:
-            :obj:`List[int]`: List of `input IDs <../glossary.html#input-ids>`__ with the appropriate special tokens.
-        """
-        if token_ids_1 is None:
-            return [self.cls_token_id] + token_ids_0 + [self.sep_token_id]
-        cls = [self.cls_token_id]
-        sep = [self.sep_token_id]
-        return cls + token_ids_0 + sep + token_ids_1 + sep
-
-    def get_special_tokens_mask(
-            self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None,
-            already_has_special_tokens: bool = False
-    ) -> List[int]:
-        """
-        Retrieve sequence ids from a token list that has no special tokens added. This method is called when adding
-        special tokens using the tokenizer ``prepare_for_model`` method.
-
-        Args:
-            token_ids_0 (:obj:`List[int]`):
-                List of IDs.
-            token_ids_1 (:obj:`List[int]`, `optional`):
-                Optional second list of IDs for sequence pairs.
-            already_has_special_tokens (:obj:`bool`, `optional`, defaults to :obj:`False`):
-                Whether or not the token list is already formatted with special tokens for the model.
-
-        Returns:
-            :obj:`List[int]`: A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
-        """
-
-        if already_has_special_tokens:
-            if token_ids_1 is not None:
-                raise ValueError(
-                    "You should not supply a second sequence if the provided sequence of "
-                    "ids is already formatted with special tokens for the model."
-                )
-            return list(map(lambda x: 1 if x in [self.sep_token_id, self.cls_token_id] else 0, token_ids_0))
-
-        if token_ids_1 is not None:
-            return [1] + ([0] * len(token_ids_0)) + [1] + ([0] * len(token_ids_1)) + [1]
-        return [1] + ([0] * len(token_ids_0)) + [1]
-
-    def create_token_type_ids_from_sequences(
-            self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
-    ) -> List[int]:
-        """
-        Create a mask from the two sequences passed to be used in a sequence-pair classification task. A BERT sequence
-        pair mask has the following format:
-
-        ::
-
-            0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
-            | first sequence    | second sequence |
-
-        If :obj:`token_ids_1` is :obj:`None`, this method only returns the first portion of the mask (0s).
-
-        Args:
-            token_ids_0 (:obj:`List[int]`):
-                List of IDs.
-            token_ids_1 (:obj:`List[int]`, `optional`):
-                Optional second list of IDs for sequence pairs.
-
-        Returns:
-            :obj:`List[int]`: List of `token type IDs <../glossary.html#token-type-ids>`_ according to the given
-            sequence(s).
-        """
-        sep = [self.sep_token_id]
-        cls = [self.cls_token_id]
-        if token_ids_1 is None:
-            return len(cls + token_ids_0 + sep) * [0]
-        return len(cls + token_ids_0 + sep) * [0] + len(token_ids_1 + sep) * [1]
-
-    def save_vocabulary(self, save_directory: str, filename_prefix: Optional[str] = None) -> Tuple[str]:
-        index = 0
-        if os.path.isdir(save_directory):
-            vocab_file = os.path.join(
-                save_directory, (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"]
-            )
-        else:
-            vocab_file = (filename_prefix + "-" if filename_prefix else "") + save_directory
-        with open(vocab_file, "w", encoding="utf-8") as writer:
-            for token, token_index in sorted(self.vocab.items(), key=lambda kv: kv[1]):
-                if index != token_index:
-                    logger.warning(
-                        "Saving vocabulary to {}: vocabulary indices are not consecutive."
-                        " Please check that the vocabulary is not corrupted!".format(vocab_file)
-                    )
-                    index = token_index
-                writer.write(token + "\n")
-                index += 1
-        return (vocab_file,)
-
-
-class NumberWordpieceTokenizer(object):
-    """Runs WordPiece tokenization."""
-
-    def __init__(self, vocab, unk_token, max_input_chars_per_word=100):
-        self.vocab = vocab
-        self.unk_token = unk_token
-        self.max_input_chars_per_word = max_input_chars_per_word
-
-    def tokenize(self, text):
-        """
-        Tokenizes a piece of text into its word pieces. This uses a greedy longest-match-first algorithm to perform
-        tokenization using the given vocabulary.
-
-        For example, :obj:`input = "unaffable"` wil return as output :obj:`["un", "##aff", "##able"]`.
-
-        Args:
-          text: A single token or whitespace separated tokens. This should have
-            already been passed through `BasicTokenizer`.
-
-        Returns:
-          A list of wordpiece tokens.
-        """
-
-        output_tokens = []
-        for token in whitespace_tokenize(text):
-            chars = list(token)
-            if len(chars) > self.max_input_chars_per_word:
-                output_tokens.append(self.unk_token)
-                continue
-
-            ########## Code changed for the number tokenization ##############
-            chars_copy = chars.copy()
-            if "." in chars_copy:
-                chars_copy.remove(".")
-            if "," in chars_copy:
-                chars_copy.remove(",")
-            if all([s.isdigit for s in chars_copy]):
-                for index, char in enumerate(chars):
-                    if index == 0:
-                        output_tokens.append(char)
-                    else:
-                        output_tokens.append("##" + char)
-            ########## end change ##############
-            else:
-                is_bad = False
-                start = 0
-                sub_tokens = []
-                while start < len(chars):
-                    end = len(chars)
-                    cur_substr = None
-                    while start < end:
-                        substr = "".join(chars[start:end])
-                        if start > 0:
-                            substr = "##" + substr
-                        if substr in self.vocab:
-                            cur_substr = substr
-                            break
-                        end -= 1
-                    if cur_substr is None:
-                        is_bad = True
-                        break
-                    sub_tokens.append(cur_substr)
-                    start = end
-
-                if is_bad:
-                    output_tokens.append(self.unk_token)
-                else:
-                    output_tokens.extend(sub_tokens)
-
-        return output_tokens
-
-
-class NumBERTBasicTokenizer(object):
-    """
-    Constructs a BasicTokenizer that will run basic tokenization (punctuation splitting, lower casing, etc.).
-
-    Args:
-        do_lower_case (:obj:`bool`, `optional`, defaults to :obj:`True`):
-            Whether or not to lowercase the input when tokenizing.
-        never_split (:obj:`Iterable`, `optional`):
-            Collection of tokens which will never be split during tokenization. Only has an effect when
-            :obj:`do_basic_tokenize=True`
-        tokenize_chinese_chars (:obj:`bool`, `optional`, defaults to :obj:`True`):
-            Whether or not to tokenize Chinese characters.
-
-            This should likely be deactivated for Japanese (see this `issue
-            <https://github.com/huggingface/transformers/issues/328>`__).
-        strip_accents: (:obj:`bool`, `optional`):
-            Whether or not to strip all accents. If this option is not specified, then it will be determined by the
-            value for :obj:`lowercase` (as in the original BERT).
-    """
-
-    def __init__(self, do_lower_case=True, never_split=None, tokenize_chinese_chars=True, strip_accents=None):
-        if never_split is None:
-            never_split = []
-        self.do_lower_case = do_lower_case
-        self.never_split = set(never_split)
-        self.tokenize_chinese_chars = tokenize_chinese_chars
-        self.strip_accents = strip_accents
-
-    def tokenize(self, text, never_split=None):
-        """
-        Basic Tokenization of a piece of text. Split on "white spaces" only, for sub-word tokenization, see
-        WordPieceTokenizer.
-
-        Args:
-            **never_split**: (`optional`) list of str
-                Kept for backward compatibility purposes. Now implemented directly at the base class level (see
-                :func:`PreTrainedTokenizer.tokenize`) List of token not to split.
-        """
-        # union() returns a new set by concatenating the two sets.
-        never_split = self.never_split.union(set(never_split)) if never_split else self.never_split
-        text = self._clean_text(text)
-
-        # This was added on November 1st, 2018 for the multilingual and Chinese
-        # models. This is also applied to the English models now, but it doesn't
-        # matter since the English models were not trained on any Chinese data
-        # and generally don't have any Chinese data in them (there are Chinese
-        # characters in the vocabulary because Wikipedia does have some Chinese
-        # words in the English Wikipedia.).
-        if self.tokenize_chinese_chars:
-            text = self._tokenize_chinese_chars(text)
-        orig_tokens = whitespace_tokenize(text)
-        split_tokens = []
-        for token in orig_tokens:
-            if token not in never_split:
-                if self.do_lower_case:
-                    token = token.lower()
-                    if self.strip_accents is not False:
-                        token = self._run_strip_accents(token)
-                elif self.strip_accents:
-                    token = self._run_strip_accents(token)
-            split_tokens.extend(self._run_split_on_punc(token, never_split))
-
-        output_tokens = whitespace_tokenize(" ".join(split_tokens))
-        return output_tokens
-
-    def _run_strip_accents(self, text):
-        """Strips accents from a piece of text."""
-        text = unicodedata.normalize("NFD", text)
-        output = []
-        for char in text:
-            cat = unicodedata.category(char)
-            if cat == "Mn":
-                continue
-            output.append(char)
-        return "".join(output)
-
-    def _run_split_on_punc(self, text, never_split=None):
-        """Splits punctuation on a piece of text."""
-        if never_split is not None and text in never_split:
-            return [text]
-        chars = list(text)
-        i = 0
-        start_new_word = True
-        output = []
-
-        ########## Code changed for the number tokenization ##############
-        chars_copy = chars.copy()
-        if "." in chars_copy:
-            chars_copy.remove(".")
-        if "," in chars_copy:
-            chars_copy.remove(",")
-        if all([s.isdigit for s in chars_copy]):
-            return [text]
-        ########## end change ##############
-        else:
-            while i < len(chars):
-                char = chars[i]
-                if _is_punctuation(char):
-                    output.append([char])
-                    start_new_word = True
-                else:
-                    if start_new_word:
-                        output.append([])
-                    start_new_word = False
-                    output[-1].append(char)
-                i += 1
-
-        return ["".join(x) for x in output]
-
-    def _tokenize_chinese_chars(self, text):
-        """Adds whitespace around any CJK character."""
-        output = []
-        for char in text:
-            cp = ord(char)
-            if self._is_chinese_char(cp):
-                output.append(" ")
-                output.append(char)
-                output.append(" ")
-            else:
-                output.append(char)
-        return "".join(output)
-
-    def _is_chinese_char(self, cp):
-        """Checks whether CP is the codepoint of a CJK character."""
-        # This defines a "chinese character" as anything in the CJK Unicode block:
-        #   https://en.wikipedia.org/wiki/CJK_Unified_Ideographs_(Unicode_block)
-        #
-        # Note that the CJK Unicode block is NOT all Japanese and Korean characters,
-        # despite its name. The modern Korean Hangul alphabet is a different block,
-        # as is Japanese Hiragana and Katakana. Those alphabets are used to write
-        # space-separated words, so they are not treated specially and handled
-        # like the all of the other languages.
-        if (
-            (cp >= 0x4E00 and cp <= 0x9FFF)
-            or (cp >= 0x3400 and cp <= 0x4DBF)  #
-            or (cp >= 0x20000 and cp <= 0x2A6DF)  #
-            or (cp >= 0x2A700 and cp <= 0x2B73F)  #
-            or (cp >= 0x2B740 and cp <= 0x2B81F)  #
-            or (cp >= 0x2B820 and cp <= 0x2CEAF)  #
-            or (cp >= 0xF900 and cp <= 0xFAFF)
-            or (cp >= 0x2F800 and cp <= 0x2FA1F)  #
-        ):  #
-            return True
-
-        return False
-
-    def _clean_text(self, text):
-        """Performs invalid character removal and whitespace cleanup on text."""
-        output = []
-        for char in text:
-            cp = ord(char)
-            if cp == 0 or cp == 0xFFFD or _is_control(char):
-                continue
-            if _is_whitespace(char):
-                output.append(" ")
-            else:
-                output.append(char)
-        return "".join(output)
-