问题遇到的现象和发生背景
问题相关代码,请勿粘贴截图
import json
def get_stored_username():
"""如果存储了用户名,就获取它"""
filename = 'userneme.json'
try:
with open(filename) as f_obj:
username = json.load(f_obj)
except FileNotFoundError:
return None
else:
return username
def get_new_username():
"""提示用户输入用户名"""
username = input("What is your name?")
filename = 'username.json'
with open(filename, 'w') as f_obj:
json.dump(username, f_obj)
return username
def greet_user():
"""问候用户,并指出其名字"""
username = get_stored_username()
if username:
print("Welcome back, " + username + "!")
else:
username = get_new_username()
print("We'll remember you when you come back, " + username + "!")
greet_user()
运行结果及报错内容
PS C:\Users\XXXXX> & C:/Python39/python.exe c:/Users/yongwei.wang/Desktop/PythonEX/remember_me.py
What is your name?Eric
We'll remember you when you come back, Eric!
PS C:\Users\XXXXX>& C:/Python39/python.exe c:/Users/yongwei.wang/Desktop/PythonEX/remember_me.py
What is your name?Eric
We'll remember you when you come back, Eric!
我的解答思路和尝试过的方法
我想要达到的结果
运行两次,第一次输入Eric 得到结果“We'll remember you when you come back, Eric!”
第二次得到结果“Welcome back,Eric!"