pythonのユーザー名とパスワードの制限の検証は

Question

users = {'adam' : 'Test123', 'alice' : 'Test321'} 
status = "" 
status = input("If you have an account, type YES, NO to create a new user, QUIT to exit: ") 

while status != 'QUIT': 

    if status == "YES": 
     u_name = input("Please provide your username: ") 
     u_pwd = input("Please provide your password: ") 

     if users.get(u_name) == u_pwd: 
      print("Access granted!") 
      break 

     else: 
      print("User doesn't exist or password error! You have 2 more attempts!") 

    elif status == "NO": 
     print("\nYou're about to create a new user on my very first app. Thank you!") 
     new_u_name = input("Please select a name for your account!") 
     new_u_pwd = input("Please select a password for your account!") 
     users[new_u_name] = new_u_pwd 
     print("Thank you " + new_u_name + " for taking the risk.") 

    elif status == "QUIT": 
     print("Smart choice lol. Please come back in few months") 

をしようと、次を実装する過去の方法だろうか： - ユーザーはYESを選択し、有効なユーザー名+ PWD =アクセス許可された終了ループを提供する場合（私はbreakを使用していますこの場合） - 最初のelseステートメントユーザーの後にもう一度2回だけusernameとpwdを入力するように尋ねられるように、ループを実装する方法はありますか？

Answer 1

私はあなたがカウンターを作成することができますね、のようなもの：

users = {'adam' : 'Test123', 'alice' : 'Test321'} 
status = "" 
status = input("If you have an account, type YES, NO to create a new user, QUIT to exit: ") 
max_attempts = 2 
while status != 'QUIT': 

    if status == "YES": 
     u_name = input("Please provide your username: ") 
     u_pwd = input("Please provide your password: ") 

     if users.get(u_name) == u_pwd: 
      print("Access granted!") 
      break 

     else: 
      if max_attempts > 0: 
       print("User doesn't exist or password error! You have {} more attempts!".format(max_attempts)) 
       max_attempts -= 1 
      else: 
       print("Too many wrong passwords. Bye!") 
       break 

    elif status == "NO": 
     print("\nYou're about to create a new user on my very first app. Thank you!") 
     new_u_name = input("Please select a name for your account!") 
     new_u_pwd = input("Please select a password for your account!") 
     users[new_u_name] = new_u_pwd 
     print("Thank you " + new_u_name + " for taking the risk.") 

    elif status == "QUIT": 
     print("Smart choice lol. Please come back in few months") 

---

ノート：

あなたはまた、次の機能を実装することもできます。

1 - チェックユーザー名がパスワードを要求する前に終了する場合
2 - YESとNOケースInsEnsiTive。