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

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

附：
difflib库