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| | | from funasr.tokenizer.abs_tokenizer import BaseTokenizer |
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| | | from funasr.register import tables |
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| | | |
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| | | |
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| | | @tables.register("tokenizer_classes", "CharTokenizer") |
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| | | class CharTokenizer(BaseTokenizer): |
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| | | def __init__( |
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| | | self, |
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| | | non_linguistic_symbols: Union[Path, str, Iterable[str]] = None, |
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| | | space_symbol: str = "<space>", |
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| | | remove_non_linguistic_symbols: bool = False, |
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| | | split_with_space: bool = False, |
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| | | seg_dict: str = None, |
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| | | **kwargs, |
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| | | ): |
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| | | super().__init__(**kwargs) |
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| | | self.space_symbol = space_symbol |
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| | | if non_linguistic_symbols is None: |
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| | | self.non_linguistic_symbols = set() |
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| | | elif isinstance(non_linguistic_symbols, (Path, str)): |
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| | | non_linguistic_symbols = Path(non_linguistic_symbols) |
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| | | try: |
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| | | with non_linguistic_symbols.open("r", encoding="utf-8") as f: |
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| | | self.non_linguistic_symbols = set(line.rstrip() for line in f) |
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| | | except FileNotFoundError: |
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| | | warnings.warn(f"{non_linguistic_symbols} doesn't exist.") |
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| | | self.non_linguistic_symbols = set() |
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| | | else: |
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| | | self.non_linguistic_symbols = set(non_linguistic_symbols) |
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| | | self.remove_non_linguistic_symbols = remove_non_linguistic_symbols |
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| | | self.split_with_space = split_with_space |
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| | | self.seg_dict = None |
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| | | seg_dict = seg_dict if seg_dict is not None else kwargs.get("seg_dict_file", None) |
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| | | if seg_dict is not None: |
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| | | self.seg_dict = load_seg_dict(seg_dict) |
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| | | |
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| | | |
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| | | def __repr__(self): |
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| | | return ( |
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| | | f"{self.__class__.__name__}(" |
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| | | f'space_symbol="{self.space_symbol}"' |
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| | | f'non_linguistic_symbols="{self.non_linguistic_symbols}"' |
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| | | f")" |
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| | | ) |
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| | | |
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| | | def text2tokens(self, line: Union[str, list]) -> List[str]: |
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| | | |
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| | | # if self.split_with_space: |
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| | | |
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| | | if self.seg_dict is not None: |
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| | | tokens = line.strip().split(" ") |
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| | | tokens = seg_tokenize(tokens, self.seg_dict) |
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| | | else: |
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| | | tokens = [] |
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| | | while len(line) != 0: |
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| | | for w in self.non_linguistic_symbols: |
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| | | if line.startswith(w): |
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| | | if not self.remove_non_linguistic_symbols: |
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| | | tokens.append(line[: len(w)]) |
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| | | line = line[len(w) :] |
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| | | break |
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| | | else: |
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| | | t = line[0] |
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| | | if t == " ": |
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| | | # t = "<space>" |
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| | | line = line[1:] |
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| | | continue |
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| | | tokens.append(t) |
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| | | line = line[1:] |
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| | | return tokens |
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| | | |
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| | | def tokens2text(self, tokens: Iterable[str]) -> str: |
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| | | tokens = [t if t != self.space_symbol else " " for t in tokens] |
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| | | return "".join(tokens) |
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| | | def __init__( |
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| | | self, |
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| | | non_linguistic_symbols: Union[Path, str, Iterable[str]] = None, |
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| | | space_symbol: str = "<space>", |
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| | | remove_non_linguistic_symbols: bool = False, |
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| | | split_with_space: bool = False, |
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| | | seg_dict: str = None, |
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| | | **kwargs, |
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| | | ): |
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| | | super().__init__(**kwargs) |
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| | | self.space_symbol = space_symbol |
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| | | if non_linguistic_symbols is None: |
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| | | self.non_linguistic_symbols = set() |
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| | | elif isinstance(non_linguistic_symbols, (Path, str)): |
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| | | non_linguistic_symbols = Path(non_linguistic_symbols) |
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| | | try: |
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| | | with non_linguistic_symbols.open("r", encoding="utf-8") as f: |
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| | | self.non_linguistic_symbols = set(line.rstrip() for line in f) |
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| | | except FileNotFoundError: |
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| | | warnings.warn(f"{non_linguistic_symbols} doesn't exist.") |
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| | | self.non_linguistic_symbols = set() |
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| | | else: |
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| | | self.non_linguistic_symbols = set(non_linguistic_symbols) |
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| | | self.remove_non_linguistic_symbols = remove_non_linguistic_symbols |
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| | | self.split_with_space = split_with_space |
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| | | self.seg_dict = None |
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| | | seg_dict = seg_dict if seg_dict is not None else kwargs.get("seg_dict_file", None) |
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| | | if seg_dict is not None: |
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| | | self.seg_dict = load_seg_dict(seg_dict) |
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| | | |
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| | | def __repr__(self): |
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| | | return ( |
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| | | f"{self.__class__.__name__}(" |
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| | | f'space_symbol="{self.space_symbol}"' |
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| | | f'non_linguistic_symbols="{self.non_linguistic_symbols}"' |
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| | | f")" |
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| | | ) |
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| | | |
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| | | def text2tokens(self, line: Union[str, list]) -> List[str]: |
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| | | # if self.split_with_space: |
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| | | if self.seg_dict is not None: |
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| | | tokens = line.strip().split(" ") |
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| | | tokens = seg_tokenize(tokens, self.seg_dict) |
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| | | else: |
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| | | tokens = [] |
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| | | while len(line) != 0: |
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| | | for w in self.non_linguistic_symbols: |
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| | | if line.startswith(w): |
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| | | if not self.remove_non_linguistic_symbols: |
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| | | tokens.append(line[: len(w)]) |
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| | | line = line[len(w) :] |
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| | | break |
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| | | else: |
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| | | t = line[0] |
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| | | if t == " ": |
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| | | # t = "<space>" |
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| | | line = line[1:] |
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| | | continue |
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| | | tokens.append(t) |
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| | | line = line[1:] |
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| | | return tokens |
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| | | |
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| | | def tokens2text(self, tokens: Iterable[str]) -> str: |
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| | | tokens = [t if t != self.space_symbol else " " for t in tokens] |
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| | | return "".join(tokens) |
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| | | |
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| | | |
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| | | def load_seg_dict(seg_dict_file): |
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| | | seg_dict = {} |
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| | | assert isinstance(seg_dict_file, str) |
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| | | with open(seg_dict_file, "r", encoding="utf8") as f: |
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| | | lines = f.readlines() |
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| | | for line in lines: |
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| | | s = line.strip().split() |
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| | | key = s[0] |
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| | | value = s[1:] |
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| | | seg_dict[key] = " ".join(value) |
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| | | return seg_dict |
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| | | seg_dict = {} |
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| | | assert isinstance(seg_dict_file, str) |
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| | | with open(seg_dict_file, "r", encoding="utf8") as f: |
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| | | lines = f.readlines() |
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| | | for line in lines: |
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| | | s = line.strip().split() |
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| | | key = s[0] |
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| | | value = s[1:] |
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| | | seg_dict[key] = " ".join(value) |
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| | | return seg_dict |
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| | | |
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| | | |
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| | | def seg_tokenize(txt, seg_dict): |
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| | | pattern = re.compile(r'^[\u4E00-\u9FA50-9]+$') |
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| | | out_txt = "" |
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| | | for word in txt: |
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| | | word = word.lower() |
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| | | if word in seg_dict: |
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| | | out_txt += seg_dict[word] + " " |
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| | | else: |
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| | | if pattern.match(word): |
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| | | for char in word: |
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| | | if char in seg_dict: |
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| | | out_txt += seg_dict[char] + " " |
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| | | else: |
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| | | out_txt += "<unk>" + " " |
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| | | else: |
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| | | out_txt += "<unk>" + " " |
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| | | return out_txt.strip().split() |
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| | | # pattern = re.compile(r'^[\u4E00-\u9FA50-9]+$') |
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| | | pattern = re.compile(r"([\u4E00-\u9FA5A-Za-z0-9])") |
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| | | out_txt = "" |
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| | | for word in txt: |
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| | | word = word.lower() |
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| | | if word in seg_dict: |
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| | | out_txt += seg_dict[word] + " " |
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| | | else: |
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| | | if pattern.match(word): |
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| | | for char in word: |
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| | | if char in seg_dict: |
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| | | out_txt += seg_dict[char] + " " |
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| | | else: |
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| | | out_txt += "<unk>" + " " |
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| | | else: |
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| | | out_txt += "<unk>" + " " |
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| | | return out_txt.strip().split() |
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