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- import json
- #存储用户名称
- def get_stored_username():
-
- filename = 'username.json'
- try:
- with open(filename) as f_obj:
- username = json.load(f_obj)
- except IOError:
- return None
- else:
- return username
- #获取新的用户名称
- def get_new_username():
-
- username = input("What's your name? ")
- filename = 'username.json'
- with open(filename, 'w') as f_obj:
- json.dump(username, f_obj)
- return username
-
- #问候用户
- def greet_user():
- username = get_stored_username()
- if username:
- new_name = input(print("Is that your name? y/n "))
- if new_name == 'y':
- print("Welcome back, " + username.title() + "!")
- else:
- username = get_new_username()
- print("We will remember you " + username)
- filename = 'username.json'
- greet_user()
复制代码 这个程序为什么在运行的时候总是打印None呢?想不明白,求助各位!
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