作业第十一天

#一：今日作业：
#1、编写文件copy工具
file_1=input('请输入复制文件路径：')
file_2=input('请输入粘贴文件路径：')
with open(r'{}'.format(file_1),mode='rt',encoding='utf-8') as f1,open(r'{}'.format(file_2),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
inp_user = input("请输入用户名：").strip()
inp_pwd = input("请输入用户密码：").strip()
with open(r'user.txt', 'rt', encoding='utf-8') as f:
    for line in f:
        user, pwd = line.strip().split('=')
        if user == inp_user and pwd == inp_pwd:
            print('login success')
            break
    else:
        print('用户名或密码错误')

#3、编写注册程序，账号密码来存入文件
username=input('请输入用户名：')
pwd=input('请输入用户密码：')
with open('user.txt',mode='at ',encoding='utf-8') as f:
    f.write('{}:{}\n'.format(username,pwd))