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67 lines
1.9 KiB
67 lines
1.9 KiB
4 years ago
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from itertools import chain
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from typing import List
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from typing import Text
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from pypinyin.constants import PHRASES_DICT
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from pypinyin.constants import RE_HANS
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from pypinyin.seg import mmseg
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def _seg(chars: Text) -> List[Text]:
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"""按是否是汉字进行分词"""
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s = '' # 保存一个词
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ret = [] # 分词结果
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flag = 0 # 上一个字符是什么? 0: 汉字, 1: 不是汉字
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for i, c in enumerate(chars):
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if RE_HANS.match(c): # 汉字, 确定 flag 的初始值
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if i == 0: # 第一个字符
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flag = 0
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if flag == 0:
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s += c
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else: # 上一个字符不是汉字, 分词
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ret.append(s)
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flag = 0
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s = c
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else: # 不是汉字
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if i == 0: # 第一个字符, 确定 flag 的初始值
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flag = 1
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if flag == 1:
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s += c
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else: # 上一个字符是汉字, 分词
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ret.append(s)
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flag = 1
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s = c
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ret.append(s) # 最后的词
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return ret
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def simple_seg(hans: Text) -> List[Text]:
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"""将传入的字符串按是否是汉字来分割"""
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assert not isinstance(hans, bytes), \
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'must be unicode string or [unicode, ...] list'
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if isinstance(hans, str):
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return _seg(hans)
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else:
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hans = list(hans)
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if len(hans) == 1:
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return simple_seg(hans[0])
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return list(chain(* [simple_seg(x) for x in hans]))
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def seg(hans: Text) -> List[Text]:
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hans = simple_seg(hans)
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ret = []
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for x in hans:
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if not RE_HANS.match(x): # 没有拼音的字符，不再参与二次分词
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ret.append(x)
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elif PHRASES_DICT:
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ret.extend(list(mmseg.seg.cut(x)))
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else: # 禁用了词语库，不分词
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ret.append(x)
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return ret
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