Python模块之 difflib 文本对比 html文件生成一致性对比文本差异对比

缺乏、安全感 2023-07-08 09:16 5阅读 0赞

> Python 内置的 difflib库为计算文本差异， 对比一致性的辅助工具

写个小样

# -*- coding: utf-8 -*-
    from pprint import pprint
    from difflib import Differ, SequenceMatcher, HtmlDiff
    
    
    def diff_compare(in_lines1: list, in_lines2: list):
        """Diff结果中符号说明 '- ' 行为序列 1 所独有 '+ ' 行为序列 2 所独有 ' ' 行在两序列中相同 '? ' 行不存在于任一输入序列 :param in_lines1: :param in_lines2: :return: """
        d = Differ()
        rst = list(d.compare(in_lines1, in_lines2))
        pprint(rst)
    
    
    def seque_match(in_lines1: list, in_lines2: list, max_ratio=1.0, flag=None):
        """ :param in_lines1: :param in_lines2: :param max_ratio: :param flag: :return: """
        for index, item in enumerate(in_lines1):
            s = SequenceMatcher(flag, item, in_lines2[index])
            rst = s.ratio()
            if rst > max_ratio:
                print(item)
            else:
                print(rst)
    
    
    def html_comp(in_lines1: list, in_lines2: list, out_file: str):
        """ :param in_lines1: :param in_lines2: :param out_file: :return: """
        d = HtmlDiff()
        result = d.make_file(in_lines1, in_lines2)
        with open(out_file, 'w') as f:
            f.writelines(result)
    
    
    if __name__ == '__main__':
        txt_lines1 = [
            '1. Beautiful is better than ugly',
            '2. Explicit is better than implicit',
            '3. Simple is better than complex',
            '4. Complex is better than complicated',
        ]
        txt_lines2 = [
            '1. Beautiful is better than ugly',
            '3. Simple is better than complex',
            '4. Complicated is better than complex',
            '5. Flat is better than nested',
        ]
        diff_compare(txt_lines1, txt_lines2)
        print('*' * 50)
        seque_match(txt_lines1, txt_lines2, max_ratio=0.7)
        print('*' * 50)
        html_comp(txt_lines1, txt_lines2, 'comp.html')

代码结果显示， 用\*\*\*\*\* 进行分割

['  1. Beautiful is better than ugly',
     '- 2. Explicit is better than implicit',
     '- 3. Simple is better than complex',
     '+ 3.   Simple is better than complex',
     '?   ++\n',
     '- 4. Complex is better than complicated',
     '?          ^                     ---- ^\n',
     '+ 4. Complicated is better than complex',
     '?         ++++ ^                      ^\n',
     '+ 5. Flat is better than nested']
    **************************************************
    1. Beautiful is better than ugly
    0.6666666666666666
    3. Simple is better than complex
    0.6666666666666666
    **************************************************

**html结果页面截图**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoaWNodTI2MQ_size_16_color_FFFFFF_t_70]

**附：**  
[difflib库][difflib]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoaWNodTI2MQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200225215552181.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoaWNodTI2MQ==,size_16,color_FFFFFF,t_70
[difflib]: https://docs.python.org/zh-cn/3.7/library/difflib.html