#/usr/bin/env python
#yehui

import os, sys

try:                                                                                                                ##当前目录创建文件夹,并拦截对应错误
    os.mkdir('userinfo')
except FileExistsError:
    print("文件夹已存在跳过")

class Sed:

    def __init__(self, oldstr, newstr):              ###定义替换sed
self.old_file = oldstr                       ###旧内容
self.new_file = newstr                       ###新内容
self.file_path = "userinfo/clock"            ###创建目录变量

    def sedfile(self):
        with open(self.file_path, 'r') as self.f, open("userinfo/back", "a+") as self.f1:   ##同时打需要修改的文件,及新创建新内容的文件
for self.i in self.f:
if self.old_file in self.i:
self.i = self.i.replace(self.old_file, self.new_file)                   ##对内容进行替换操作
self.f1.write(self.i)                                                       ##写入操作
self.f1.flush()                                                             ##立即刷新
        os.remove(self.file_path)                                                           ##删除原文件
        os.rename("userinfo/back", self.file_path)                                          ##新文件改名

sed = Sed("0这是坚强的肥DD!", "我去!!!")
sed.sedfile()