You've already forked DataMate
65 lines
2.8 KiB
Python
65 lines
2.8 KiB
Python
#!/user/bin/python
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# -*- coding: utf-8 -*-
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"""
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Description: 文档目录去除
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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 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 ContentCleaner(Mapper):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.no_content_count = 3 # 连续不符合目录结构的行数阈值
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# 目录标题
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self.content_text_pattern = r"^ *(目 *录|CONTENT(S)?) *$"
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# 目录行 前缀格式
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self.content_preface_pattern = r"^ *(前言|About This Document|\d+(\.\d+)*|[a-zA-Z]+(\.\d+)*)"
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# 目录行 中间格式
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self.content_middle_pattern = r"\.{7,}"
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# 目录行 结尾格式
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self.content_end_pattern = r"(\d|错误!未定义书签。|[IXV]+) *$"
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self.content_pattern = self.content_preface_pattern + ".*" + self.content_end_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._content_filter(sample[self.text_key])
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logger.info(f"fileName: {sample[self.filename_key]}, method: ContentCleaner costs {time.time() - start:6f} s")
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return sample
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def _content_filter(self, input_data: str):
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count = 0 # 记录不符合目录结构的次数，连续3行不满足要求，则认为已经进入正文
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# 目录起始和结束索引
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content_start_index, content_end_index = -1, -1
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lines = input_data.split("\n")
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for i, line in enumerate(lines):
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if content_start_index >= 0 and count >= self.no_content_count:
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break
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# 首先匹配目录或content字眼
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if content_start_index < 0 and re.match(self.content_text_pattern, line, re.IGNORECASE):
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content_start_index = i
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content_end_index = i
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# 匹配两种形式的目录行
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# 1. 以指定格式开始、指定格式结尾；2.该行包含点数量超过7个
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elif content_start_index >= 0 and (re.match(self.content_pattern, line, re.IGNORECASE)
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or re.search(self.content_middle_pattern, line)):
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content_end_index = i
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count = 0
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elif content_start_index >= 0 and not (re.match(self.content_pattern, line, re.IGNORECASE)
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or re.search(self.content_middle_pattern, line)):
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count += 1
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if 0 <= content_start_index < content_end_index:
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res = "\n".join(lines[:content_start_index] + lines[content_end_index + 1:])
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else:
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# 只有目录关键字时，关键字不去除;或不符合目录结构，返回原文
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res = "\n".join(lines)
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return res
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