問題描述

#coding:GBKimport jsondef getstoredname(): filename = ’username.json’ try:with open(filename) as f: username = json.load(f) except:return None else:return usernamedef getnewname(): username = input('What is your name? ') filename = ’username.json’ with open(filename,’a+’) as f:json.dump(username,f) return username def greetuser(): username = getstoredname() if username:print('Welcome back, ' + username + '!') else:username = getnewname()print ('We’ll remember you when you come back, ' + username + '!')greetuser()

這個問題應該怎么改代碼？

問題解答

def greetuser(): username = getstoredname() if username and input('Is that your name: ' + username + ' (y/n)')=='y': print('Welcome back, ' + username + '!') else:username = getnewname()print ('We’ll remember you when you come back, ' + username + '!')

我回答過的問題: Python-QA

import json’’’如果以前存儲了用戶名，就加載它,并詢問是否為該用戶的用戶名，否則，就提示用戶輸入用戶名并存儲它 ?！痜ilename = ’username.json’try:

with open(filename) as f_obj: username = json.load(f_obj) if input(’Is that your name: ’ + username +’?’ + ’ (y/n) n’)==’y’:print('Welcom back,%s!' %username) else:username = input(’What is your name?n’)with open(filename,’w’) as f_obj: json.dump(username,f_obj) print('We’ll remember you when you come back,%s!' % username)

except FileNotFoundError:

username = input(’What is your name?n’)with open(filename,’w’) as f_obj: json.dump(username,f_obj) print('We’ll remember you when you come back,%s!' % username)