Python的類型錯誤：take_one（）缺少必需的1位置參數： '狀態'

Question

下面的代碼：

from tkinter import * 

class Main_content: 
    def take_one(self, state): 
     state = state - 1 
     return self.state 

    def take_two(self, state): 
     state = state - 2 
     return self.state 

    def __init__(self, master, state): 
     frame = Frame(master) 
     frame.pack() 

     self.label_status = Label(frame, text = "Coins left: " + str(state)) 
     self.label_status.pack() 
     self.label_status = Label(frame, text = "Player " + str(player) + " turn's") 
     self.label_status.pack() 

     self.pak_een = Button(frame, text="Take 1 coin", command=self.take_one) 
     self.pak_een.pack() 
     self.pak_twee = Button(frame, text="Take 2 coins", command=self.take_two) 
     self.pak_twee.pack() 

root = Tk() 

player = 1 
state = 21 
b = Main_content(root, state) 

root.mainloop() 

的錯誤是：

Traceback (most recent call last): 
    File "C:\Users\Freddie\AppData\Local\Programs\Python\Python35-32\lib\tkinter\__init__.py", line 1550, in __call__ 
    return self.func(*args) 
TypeError: take_two() missing 1 required positional argument: 'state' 

我新，所以我想不通我做錯了什麼。我不知道這意味着什麼。

Answer 1

有一些問題：

1. take_one和take_two方法需要一個參數state，但你永遠不通過他們這樣的說法。

2. self.state您試圖在這些函數中返回的內容從未在任何地方定義過。

3. 即使代碼的其餘部分工作，行state = state - 1和state = state - 2沒有任何用處。 state是這些函數中的局部變量，永遠不會被返回或使用。

，可以儲存state傳遞給__init__在self.state，則該事件處理程序將有機會獲得它，不需要把它作爲一個參數，他們將不再需要返回它：

class Main_content: 

    def take_one(self): 
     self.state -= 1 

    def take_two(self): 
     self.state -= 2 

    def __init__(self, master, state): 
     frame = Frame(master) 
     frame.pack() 

     self.state = state 
     self.label_status = Label(frame, text = "Coins left: " + str(self.state)) 
     self.label_status.pack() 
     self.label_status = Label(frame, text = "Player " + str(player) + " turn's") 
     self.label_status.pack() 

     self.pak_een = Button(frame, text="Take 1 coin", command=self.take_one) 
     self.pak_een.pack() 
     self.pak_twee = Button(frame, text="Take 2 coins", command=self.take_two) 
     self.pak_twee.pack() 

如果我按照你的邏輯，你還需要每一個按鈕按下的self.state電流值的時間來更新標籤的價值，我會離開，作爲一個練習留給讀者:)