Python使用difflib模块比较两个文件内容异同，同时输出html易浏览

因工作需求，需要对比连个文件异同，并输出html格式来对比。

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
import difflib

def read_file(filename):
    try:
        with open(filename, 'r') as f:
            return f.readlines()
    except IOError:
        print("ERROR: 没有找到文件:%s或读取文件失败！" % filename)
        sys.exit(1)

def compare_file(file1, file2, out_file):
    file1_content = read_file(file1)
    file2_content = read_file(file2)
    d = difflib.HtmlDiff()
    result = d.make_file(file1_content, file2_content)
    old_str='charset=ISO-8859-1'
    new_str='charset=UTF-8'
    with open(out_file, 'w') as f:
        f.writelines(result.replace(old_str,new_str))

if __name__ == '__main__':
    compare_file(r'd:\1\a.log', r'd:\2\a.log', r'd:\result.html')

输出为一个result.html文件，打开后已于浏览。

参考：Python--比较文件内容
python使用difflib对比文件示例
Python自动化运维笔记（四）：使用difflib模块实现文件内容差异对比

还有一种需要，需要手动要检测的脚本
difflib模块文件内容差异对比
源码a.py如下：(对比两个配置文件差异)

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import difflib
import sys

try:
    textfile1 = sys.argv[1]
    textfile2 = sys.argv[2]
except Exception,e:
    print "Error:" +str(e)
    print "Usage: python sample3.py filename1 filename2"
    sys.exit()

def readfile(filename):
    try:
        filehandle = open(filename,'rb')
        text = filehandle.read().splitlines()
        filehandle.close()
        return text
    except IOError as error:
        print ('Read file Error:' +str(error))
        sys.exit()

text1_lines = readfile(textfile1)
text2_lines = readfile(textfile2)

d = difflib.HtmlDiff()
print d.make_file(text1_lines,text2_lines)

用法：
python a.py nginx.conf.v1 nginx.conf.v2 > sample3_diff.html

转载于:https://blog.51cto.com/weiruoyu/2340086