試圖使用類函數在文件中編寫字符串

Question

我試圖編寫一個簡單的遊戲，並需要在文件中寫入一些信息。這是怎樣的代碼看起來像至今：

class Player: 
    def __init__(self, name, password, file): 
     with open(file) as inputFile: 
      self.playerAndPw = inputFile.read() 
     self.name = name 
     self.password = password 


    def add(self, name, password, file): 
     file.write(name + " | " + password) 


    def __str__(self): 
     print("The player's name is called " + self.name + "\n") 

print("Welcome to Guess My Number!") 
start = input("Press 1 for New Account, 2 for Log In: ") 

if start == "1": 
    player = Player 
    playerID = input("Enter a name: ") 
    playerPassword = input("Enter a password: ") 
    fileName = "PlayerAndPassword.txt" 
    player.add(playerID, playerPassword, fileName) 

在最後一行出現在最後的支架異常：「參數‘文件’填充因此，代碼不能得到信息的功能我使用的最後一行。

將是巨大的，如果有人可以幫助我！謝謝！

Answer 1

這是我試圖糾正你的代碼，盡我所能。正如指出的評論，您需要將player設置爲Player類的實例通過將其實例化爲player = Player(...)。

因爲您傳遞播放器的名稱，密碼和文件以將憑據存儲到Player構造函數中，所以不需要將這些參數作爲參數傳遞給Player.add，這就是爲什麼我刪除所有參數的原因。

我應該指出，這個實現是非常簡單和不完整的，只是爲了解決你的即時問題而設計的。在每次調用Player構造函數後，我的實現將導致文件句柄保持打開狀態。如果您選擇這種方法，你可能需要閱讀the Python documentation on input and output operations.

class Player: 
    def __init__(self, name, password, fileName): 
     self.name = name 
     self.password = password 
     self.file = open(fileName, mode='a') 

    def add(self): 
     self.file.write(self.name + " | " + self.password + '\n') 

    def __str__(self): 
     print("The player's name is called " + self.name + "\n") 


print("Welcome to Guess My Number!") 
start = input("Press 1 for New Account, 2 for Log In: ") 

if start == "1": 
    playerId = input("Enter a name: ") 
    playerPassword = input("Enter a password: ") 
    fileName = "PlayerAndPassword.txt" 
    player = Player(playerId, playerPassword, fileName) 
    player.add() 

控制檯輸出

Welcome to Guess My Number! 
Press 1 for New Account, 2 for Log In: 1 
Enter a name: Tom 
Enter a password: Foo 

Welcome to Guess My Number! 
Press 1 for New Account, 2 for Log In: 1 
Enter a name: Dick 
Enter a password: Bar 

Welcome to Guess My Number! 
Press 1 for New Account, 2 for Log In: 1 
Enter a name: Harry 
Enter a password: Baz 

PlayersAndPasswords.txt

Tom | Foo 
Dick | Bar 
Harry | Baz 

Answer 2

class Player: 
    def __init__(self, name, password, file): 
     self.name = name 
     self.password = password 
     self.file = open(file, mode='a') #first assign file to self.file(referring to this file) 


    def add(self): #need to add those parameters as they are already initialized by constructor 
     self.file.write(self.name + " | " + self.password) 


    def __str__(self): 
     print("The player's name is called " + self.name + "\n") 

print("Welcome to Guess My Number!") 
start = input("Press 1 for New Account, 2 for Log In: ") 

if start == "1": 
    playerID = input("Enter a name: ") 
    playerPassword = input("Enter a password: ") 
    fileName = "PlayerAndPassword.txt" 
    player = Player(playerID, playerPassword, fileName) #create instance with said values 
    player.add() #call the add function to add