python - 乒乓球游戏两名玩家 tkinter 错误

Question

我尝试执行这段代码:

import Tkinter as tk
import tkFont
import functools
import math
import random
import time

class Pong(tk.Canvas):

    DEFAULTS = dict(width=640, height=480,background='black',highlightthickness=0)

    def main(cls):
        root = tk.Tk()
        root.title('Pong')
        root.resizable(False, False)
        root.bind_all('<Escape>', lambda event: root.destroy())
        game = cls(tkFont.Font(family='Book Antiqua', size=15, weight='bold'), 5, 100,background='black', width=640, height=480)
        game.grid()
        root.mainloop()

但我有这些错误:

Traceback (most recent call last):
   line 413, in <module>
    pong.main()
  , line 17, in main
    game = cls(tkFont.Font(family='Book Antiqua', size=15, weight='bold'), 5, 100,background='black', width=640, height=480)
AttributeError: Pong instance has no __call__ method

Answer 1

到目前为止我可以看到一个主要问题

cls 作为变量传入

def main(cls):  

然后你就可以像函数一样使用它

game = cls(tkFont.Font(family='Book Antiqua', size=15, weight='bold'), 5, 100,background='black', width=640, height=480)