Python(69)_写函数，实现修改文件内容

Posted 2021-02-03 sunnybowen

#-*-coding:utf-8-*-
import os
‘‘‘
写函数，用户传入修改的文件名，与修改的内容
执行函数，完成整个文件的批量修改操作
‘‘‘
def func(filename,old,new):
    with open(filename,encoding=‘utf-8‘) as f,open(‘%s.bak‘%filename,‘w‘,encoding=‘utf-8‘) as f2:
        for line in  f:
            if old in line:
                line = line.replace(old,new)
         #写文件
            f2.write(line)
        os.remove(filename)
        os.replace(‘%s.bak‘%filename,filename)

func(‘log.txt‘,‘bowen‘,‘Love‘)