對象有參數，但表示不

Question

from tkinter import * 
import random 
import time 
tk = Tk() 
tk.title("Pong") 
tk.resizable(0,0) 
tk.wm_attributes("-topmost", 1) 
canvas = Canvas(tk, width=500, height=400, bd=0, highlightthickness=0) 
canvas.pack() 
tk.update() 
class Ball: 
    def _init_(self, canvas, color): 
     self.canvas = canvas 
     self.id = canvas.create_oval() 
     self.canvas.move(self.id, 245, 100) 

    def draw(self): 
     pass 
ball = Ball(canvas, 'red') 

當我運行的代碼，它會返回錯誤：

TypeError: object() takes no parameters 

即使對象的參數定義。

Answer 1

正如其他人所指出的，你需要在__init__， 使用雙下劃線和你錯過參數​​電話：

def __init__(self, canvas, color): # <--- double underscores 
    self.canvas = canvas 
    self.id = canvas.create_oval(0, 0, 100, 100) # <--- missing arguments 
    self.canvas.move(self.id, 245, 100)