Python用戶註冊

Question

我正在嘗試製作一個工作用戶註冊程序。當詢問用戶名時，系統會查看輸入的文本是否已經存儲。如果用戶名已經存儲，它將要求該用戶的密碼。但是，如果用戶名未被存儲，它將要求輸入密碼。輸入這些內容後，該腳本將附錄到.py文件的.txt文件中以創建新帳戶。帳戶建立後，腳本可以讀取.txt或.py文件以獲取登錄信息。我當前的登錄代碼：

loop = "true" 
while(loop == "true"): 
    username = input("Enter Username: ") 
    password = input("Enter Password: ") 
    h = input ("Do You Need Help [Y/N]: ") 
    if(h == "Y" or h == "y" or h == "yes" or h == "Yes"): 
    print ("Enter username and password to login. If you do not have an account yet, enter 'Guest' as the username and press enter when it asks for the password.") 
    elif(h == "N" or h == "n" or h == "no" or h == "No"): 
     print (" >> ") 
    if(username == "Hello World" and password == "Hello World" or username == "Test User" and password == "Test User" or username == "Guest"): 
     print ("Logged in Successfully as " + username) 
     if(username == "Guest"): 
      print ("Account Status: Online | Guest User") 
     if not (username == "Guest"): 
      print ("Account Status: Online | Standard User") 

如何製作一個數據庫，python可以讀取用戶名和密碼？另外，你如何做到這一點，使Python可以附加到數據庫添加更多的用戶名和密碼？

這是Python v3.3.0 Mac OSX 10.8

預先感謝您！

Answer 1

嘗試使用pickle模塊：

>>> import pickle 
>>> myusername = "Hello" 
>>> mypassword = "World" 
>>> login = [myusername, mypassword] 
>>> pickle.dump(login, open("%s.p" % login[0], "wb")) #Saves credentials in Hello.p, because Hello is the username 
>>> #Exit 

現在把它找回來

>>> import pickle 
>>> try: 
... password = pickle.load(open("Hello.p", "rb"))[1] 
... username = pickle.load(open("Hello.p", "rb"))[0] 
... except IndexError: #Sees if the password is not there 
... print("There is no information for those credentials") 
... 
>>> password 
'mypassword' 
>>> username 
'myusername' 

如果沒有密碼或用戶名，它打印There is no information for those credentials ...希望這有助於！

而只是提示：不打擾通過if(h == 'n'...，只是做一個h.lower().startswith("n") == True。 .lower()使所有內容都爲小寫，str.startswith("n")檢查str是否以字母n開始。