python脚本修改hosts文件，python写脚本入门,　　用python3

python脚本修改hosts文件，python写脚本入门,　　用python3

　　用python3写了个修改hosts的小脚本，没有技术含量，顺带复习一下文件操作和os、sys模块的内容了。

# -*- coding:utf-8 -*- #!/usr/bin/env python# @Author  : tianbao# @Contact : [email protected]# @Time    : 2018/4/5 17:06# @File    : change_host_file.py# @Software: PyCharm‘‘‘使用说明：    PATH :HOSTS文件路径    NEW_PATH :新HOSTS文件路径        在change_host_file.py所在目录打开cmd运行以下命令                                     方法   IP        网址    添加：python change_host_file.py add 8.8.8.8 www.google.com    删除：python hange_host_file.py del 126.125.66.198   删除整行    修改：python hange_host_file.py change www.cnblogs.com www.google.com                                                 old              new‘‘‘import sys,os,rePATH = ‘G:\jiaoben\HOSTS‘NEW_PATH = ‘G:\jiaoben\HOSTS_NEW‘def run():    try:        if sys.argv[1] == ‘add‘:            with open(PATH,‘a+‘,encoding=‘utf-8‘) as f:                new_IP = sys.argv[2] + ‘ ‘+ sys.argv[3]                f.write(‘\n‘)                f.write(new_IP)                sys.exit(‘添加成功，请查看源文件‘)        elif sys.argv[1] == ‘del‘:            with open(PATH, ‘r+‘, encoding=‘utf-8‘) as f,open(NEW_PATH, ‘a+‘, encoding=‘utf-8‘) as f2:                data = f.readlines()                for line in data:                    if sys.argv[2] in line:                        continue                    f2.write(line)            os.remove(PATH)            os.rename(NEW_PATH,PATH)            sys.exit(‘删除成功，请查看源文件‘)        elif sys.argv[1] == ‘change‘:            open(NEW_PATH, ‘a+‘).write(re.sub(r‘%s‘% sys.argv[2],‘%s‘% sys.argv[3],open(PATH).read()))            os.remove(PATH)            os.rename(NEW_PATH,PATH)            sys.exit(‘修改成功，请查看源文件‘)    except Exception as e:        print(e)if __name__ == ‘__main__‘:    run()

python脚本修改hosts文件