• python学习0313作业


    #一:今日作业:
    #1、编写文件copy工具
    # src_file = input("请输入源文件路径:").strip()
    # des_file = input("请输入目标文件路径:").strip()
    # with open(r'{}'.format(src_file),mode='rt',encoding="utf-8") as f1,
    #         open(r'{}'.format(des_file),mode='wt',encoding="utf-8") as f2:
    #     res1 = f1.read()
    #     f2.write(res1)
    # print(res1)
    
    #2、编写登录程序,账号密码来自于文件
    # username = input("请输入您的账号:").strip()
    # password = input("请输入密码:").strip()
    # with open(r'user.txt',mode='rt',encoding="utf-8") as f:
    #     for line in f:
    #         user,pwd = line.strip().split(":")
    #         if user == username and pwd == password:
    #             print("登录成功!!")
    #             break
    #     else:
    #         print("登录失败!!!")
    
    #3、编写注册程序,账号密码来存入文件
    # username = input("请输入注册账号:").strip()
    # password = input("请输入注册密码:").strip()
    # with open(r'user2.txt',mode='at',encoding='utf-8') as f:
    #     f.write('{}:{}
    '.format(username,password))
    #二:周末综合作业:
    # 2.1:编写用户登录接口
    #1、输入账号密码完成验证,验证通过后输出"登录成功"
    #2、可以登录不同的用户
    #3、同一账号输错三次锁定,(提示:锁定的用户存入文件中,这样才能保证程序关闭后,该用户仍然被锁定)
    
    count = 1
    while count <= 3:
        username = input("请输入您的账号:").strip()
        password = input("请输入密码:").strip()
        with open(r'user.txt', mode='rt', encoding="utf-8") as f1:
            for line in f1:
                user, pwd = line.strip().split(":")
                if user == username and pwd == password:
                    print("登录成功!!")
                    count = 4
                    break
            else:
                with open(r'user.txt', mode='at', encoding='utf-8') as f2:
                    f2.write('{}:{}
    '.format(username, password))
                    print("您输入的账号或者密码错误,请重新输入")
        count += 1
    with open(r'user.txt', mode='rt', encoding="utf-8") as f3:
        for i in f3.readlines():
            print(i)
    # 2.2:编写程序实现用户注册后,可以登录,
    # 提示:
    # while True:
    #     msg = """
    #     0 退出
    #     1 登录
    #     2 注册
    #     """
    #     print(msg)
    #     cmd = input('请输入命令编号>>: ').strip()
    #     if not cmd.isdigit():
    #         print('必须输入命令编号的数字,傻叉')
    #         continue
    #     if cmd == '0':
    #         print("退出")
    #         break
    #     elif cmd == '1':
    #         # 登录功能代码(附加:可以把之前的循环嵌套,三次输错退出引入过来)
    #         count = 1
    #         while count <= 3:
    #             username = input("请输入您的账号:").strip()
    #             password = input("请输入密码:").strip()
    #             with open(r'user.txt', mode='rt', encoding="utf-8") as f:
    #                 for line in f:
    #                     user, pwd = line.strip().split(":")
    #                     if user == username and pwd == password:
    #                         print("登录成功!!")
    #                         count = 4
    #                         break
    #                 else:
    #                     print("登录失败!!!")
    #             count += 1
    #         else:
    #             print("拜拜")
    #     elif cmd == '2':
    #         # 注册功能代码
    #         username = input("请输入注册账号:").strip()
    #         password = input("请输入注册密码:").strip()
    #         with open(r'user.txt', mode='at', encoding='utf-8') as f:
    #             f.write('{}:{}
    '.format(username, password))
    #         print("已注册成功!!!")
    # else:
    #     print('输入的命令不存在')
    
    # 思考:上述这个if分支的功能否使用其他更为优美地方式实现
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  • 原文地址:https://www.cnblogs.com/liunaixu/p/12488690.html
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