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70 lines
3.2 KiB
Python
70 lines
3.2 KiB
Python
#!/user/bin/python
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# -*- coding: utf-8 -*-
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"""
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Description: 多余空格去除
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Create: 2025/01/13
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"""
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import re
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import time
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from pathlib import Path
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from typing import Dict, Any
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from loguru import logger
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from datamate.core.base_op import Mapper
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class ExtraSpaceCleaner(Mapper):
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"""去除多余空格、多余空行，包括文档首尾空格、首尾tab
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【注意】去除多余空格前，会先将文档中所有空格规范化为\u0020
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"""
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def __init__(self, *args, **kwargs):
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# 匹配文档中非常见的unicode 空格
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super().__init__(*args, **kwargs)
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self.white_space_pattern = ('[\u00A0 \u1680 \u2000-\u200D \u2028-\u2029'
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' \u202F \u205F \u3000 \u180E \u2060 \uFEFF]')
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self._file_path = Path(__file__).parent / 'resources' / 'special_token.txt'
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self.escaped_special_chars = self._get_escaped_special_chars() # 加载标点符号
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# 匹配文章中，连续多个空格
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extra_space_pattern = r" {2,}"
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# 匹配多个空格、换行符混排情况
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extra_line_pattern = r"( |\n){2,}"
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# 匹配中文、符号间多余空格
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extra_space_in_chinese_pattern = r"(?<=[\u4e00-\u9fa5" + self.escaped_special_chars + r"]) +(?=[\u4e00-\u9fa5" \
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+ self.escaped_special_chars + r"])"
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self.extra_space_re_compile = re.compile(extra_space_pattern)
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self.extra_space_in_chinese_re_compile = re.compile(extra_space_in_chinese_pattern)
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self.extra_line_re_compile = re.compile(extra_line_pattern)
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self.white_space_pattern_compile = re.compile(self.white_space_pattern)
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def execute(self, sample: Dict[str, Any]) -> Dict[str, Any]:
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start = time.time()
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sample[self.text_key] = self._clean_extra_space(sample[self.text_key])
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logger.info(
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f"fileName: {sample[self.filename_key]}, method: ExtraSpaceCleaner costs {time.time() - start:6f} s")
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return sample
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def _get_escaped_special_chars(self) -> str:
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with open(self._file_path, 'r', encoding='utf-8') as f:
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self._special_token = f.read().splitlines()
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res = ''.join([re.escape(char) for char in self._special_token]) # 将特殊字符转义并拼接成字符串
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return res
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def _clean_extra_space(self, input_data: str) -> str:
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# 将文档中非常见的 unicode 空格，如 u2008，转换为正常空格（半角空格）
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input_data = self.white_space_pattern_compile.sub('\u0020', input_data)
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# 移除文档首尾、句中或标点符号附近多余空格和 tab
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input_data = input_data.strip()
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# 逐行移除首尾空格
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text = "\n".join([line.strip() for line in input_data.split("\n")])
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text = ''.join(['【', text, '】'])
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# 连续空格替换为一个正常空格
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remove_extra_space = self.extra_space_re_compile.sub("\u0020", text)
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# 去除中文、符号间的空格
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remove_extra_space_in_chinese = self.extra_space_in_chinese_re_compile.sub("", remove_extra_space)
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# 去除连续换行符
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remove_duplicate_line = self.extra_line_re_compile.sub("\n", remove_extra_space_in_chinese)
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return remove_duplicate_line[1:-1]
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