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  • 面向对象练习

    # 定义一个用户类,用户名和密码是这个类的属性,实例化两个用户,分别有不同的用户名和密码
    # 登陆成功之后才创建用户对象
    # 设计一个方法 修改密码
    import os
    def login(name,passwd,filepath = 'userinfo'):
    with open(filepath,encoding='utf-8') as f:
    for line in f:
    user,pwd = line.strip().split('|')
    if user == name and passwd == pwd:
    return True
    else:
    return False

    class User:
    def __init__(self,username,password):
    self.user = username
    self.pwd = password

    def change_pwd(self):
    oldpwd = input('输入原密码 :')
    newpwd = input('输入新密码 :')
    flag = False
    with open('userinfo',encoding='utf-8') as f1,open('userinfo.bak',mode='w',encoding='utf-8') as f2:
    for line in f1:
    username,password = line.strip().split('|')
    if username == self.user and password == oldpwd:
    line = '%s|%s '%(username,newpwd)
    flag = True
    f2.write(line)
    os.remove('userinfo')
    os.rename('userinfo.bak','userinfo')
    return flag
    name = input('user : ')
    passwd = input('pwd : ')
    ret = login(name,passwd)
    if ret:
    print('登录成功')
    obj = User(name,passwd)
    res = obj.change_pwd()
    if res:print('修改成功')
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  • 原文地址:https://www.cnblogs.com/diracy/p/13379929.html
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