3-13 作业

 

 1.编写文件copy工具

1 src_file = input(">>>请输入要拷贝的文件路径：").strip()
2 copy_file = input(">>>请输入拷贝文件的存放位置：").strip()
3 with open(r'{}'.format(src_file), 'rt', encoding='utf-8') as f,\
4         open(r'{}\copy.txt'.format(copy_file), 'wt', encoding='utf-8') as copy_f:
5     copy = f.read()
6     copy_f.write(copy)

2、编写登录程序，账号密码来自于文件

 1 print("登录")
 2 inp_user = input(">>>your name：").strip()
 3 inp_pwd = input(">>>your password：").strip()
 4 with open(r'user.txt', 'rt', encoding='utf-8') as f:
 5     for line in f:
 6         user, pwd = line.strip().split(':')
 7         if user == inp_user and pwd == inp_pwd:
 8             print('login success')
 9             break
10     else:
11         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

1 print("注册")
2 inp_user = input(">>>your name：").strip()
3 inp_pwd = input(">>>your password：").strip()
4 with open(r'user.txt', 'at', encoding='utf-8') as f:
5     f.write('{user}:{pwd}\n'.format(user=inp_user, pwd=inp_pwd))