json.dump与json.load 

 1 import json
 2 
 3 def get_stored_username():
 4     """如果存储了用户名，就获取它"""
 5     filename = 'username.json'
 6     try:
 7         with open(filename) as f:
 8             username = json.load(f)
 9     except FileNotFoundError:
10         return None
11     else:
12         return username
13 
14 def get_new_username():
15     """提示用户输入用户名"""
16     username = input("What is your name? ")
17     filename = 'username.json'
18     with open(filename, 'w') as f:
19         json.dump(username, f)
20     return username
21 
22 def greet_user():
23     """问候用户，并指出其姓名"""
24     username = get_stored_username()
25     if username:
26         print(f"Welcome back, {username}!")
27     else:
28         username = get_new_username()
29         print(f"We'll remember you when you come back, {username}!")
30 
31 greet_user()

 

posted @ 2022-04-20 16:56  ☞『宿-芜』  阅读(39)  评论(0)    收藏  举报