python第十天作业

1、编写文件copy工具

path_file = input('请输入想要复制文件的绝对路径：').strip()
path_file2 = input('请输入想要复制文件到哪里的绝对路径：').strip()
with open(r'file'.format(file=path_file), mode='rt', encoding='utf - 8') as f1, 
        open(r'file2'.format(file2=path_file2), mode='wt', encoding='utf - 8') as f2:
    res = f1.read()
    f2.write(res)

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('请输入您的密码：').strip()
with open('db.txt', mode='rt', encoding='utf-8') as f:
    for i in f:
        user_name, user_pwd = i.strip().split(':')
        if username == user_pwd and password == user_pwd:
            print('登陆成功')
            break
    else:
        print('登陆失败')

3、编写注册程序，账号密码来存入文件

username = input('请输入您的账号：').strip()
password = input('请输入您的密码：').strip()
with open('db.txt', mode='at', encoding='utf-8') as f:
    f.write('{x}:{y}'.format(x=username, y=password))