#!/usr/bin/env python
# -*- coding:UTF-8 -*-
import fileinput
File = ‘user.txt‘
for line in fileinput.input(File, inplace=1): # inplace=1，表示做完替换后立刻回到文件初始行
line = line.replace(‘003‘, ‘002‘)
print line,本文出自 “JUST DON'T GIVE UP!” 博客，请务必保留此出处http://zliang90.blog.51cto.com/3001993/1363663
fileinput模块对文本进行全局替换,布布扣,bubuko.com
原文：http://zliang90.blog.51cto.com/3001993/1363663