Python 我怎样才能重新开始我的乒乓球比赛，并保持我的分数工作？

我一直在为我的第一个完整Python项目开发一个乒乓球游戏，大部分操作都使用tkinter。但是，如果不禁用左上角的分数计数器，我就无法使用我添加的重新启动按钮重新启动程序。 以下是我的代码：

from tkinter import *
import random
import time
import pygame
import os, sys
import time

class Ball:

    def __init__(self, canvas, paddle, color):
        self.canvas = canvas
        self.paddle = paddle
        self.id = canvas.create_oval(10, 10, 25, 25, fill='red')
        self.canvas.move(self.id, 245, 100)
        starts = [-3, -2, -1, 1, 2, 3]
        random.shuffle(starts)
        self.x = starts[0]
        self.y = -3
        self.canvas_height = self.canvas.winfo_height()
        self.canvas_width = self.canvas.winfo_width()
        self.hit_bottom = False
        self.score = 0

    def hit_paddle(self, pos):
        paddle_pos = self.canvas.coords(self.paddle.id)
        if pos[2] >= paddle_pos[0] and pos[0] <= paddle_pos[2]:
            if pos[3] >= paddle_pos[1] and pos[3] <= paddle_pos[3]:
                return True
        return False

    def draw(self):
        self.canvas.move(self.id, self.x, self.y)
        pos = self.canvas.coords(self.id)
        if pos[1] <= 0:
            self.y = 3
        if pos[3] >= self.canvas_height:
            self.hit_bottom = True
        if self.hit_paddle(pos) == True:
            self.y = -3
        if pos[0] <= 0:
            self.x = 3
        if pos[2] >= self.canvas_width:
            self.x = -3
        if self.hit_paddle(pos) == True:
            self.score += 1

class Paddle:
    def __init__(self, canvas, color):
        self.canvas = canvas
        self.id = canvas.create_rectangle(0, 0, 150, 10, fill='blue')
        self.canvas.move(self.id, 450, 750)
        self.x = 0
        self.y = 0
        self.canvas_width = self.canvas.winfo_width()
        self.canvas.bind_all('<KeyPress-Left>', self.turn_left)
        self.canvas.bind_all('<KeyPress-Right>', self.turn_right)
        self.canvas.bind_all('<KeyRelease-Left>', self.stop_left)
        self.canvas.bind_all('<KeyRelease-Right>', self.stop_right)
        self.canvas.bind_all('<KeyPress-Up>', self.turn_up)
        self.canvas.bind_all('<KeyPress-Down>', self.turn_down)
        self.canvas.bind_all('<KeyRelease-Up>', self.stop_up)
        self.canvas.bind_all('<KeyRelease-Down>', self.stop_down)

    def draw(self):
        self.canvas.move(self.id, self.x, self.y)
        pos = self.canvas.coords(self.id)
        if pos[0] <= 0:
            self.x = 0
        elif pos[2] >= self.canvas_width:
            self.x = 0
    def turn_left(self, evt):
        self.x = -3
    def turn_right(self, evt):
        self.x = 3
    def stop_left(self, evt):
        self.x = 0
    def stop_right(self, evt):
        self.x = 0
    def turn_up(self, evt):
        self.y = -0
    def turn_down(self, evt):
        self.y = 0
    def stop_up(self, evt):
        self.y = 0
    def stop_down(self, evt):
        self.y = 0
def restart ():
    global paddle, ball
    canvas.delete (ALL)
    paddle = Paddle(canvas, 'blue')
    ball = Ball(canvas, paddle, 'red')
    label = canvas.create_text(5, 5, anchor=NW, text="Score: 0", font=('Courier, 40'), fill='white')
    canvas.itemconfig(label, text="Score: "+str(ball.score))

def main ():
    global paddle, ball
    tk.update()

    paddle = Paddle(canvas, 'blue')
    ball = Ball(canvas, paddle, 'red')

    while 1:
        if ball.hit_bottom == False:
            ball.draw()
            paddle.draw()
        tk.update_idletasks()
        tk.update()
        time.sleep(0.01)
        if ball.hit_bottom == True:
            canvas.create_text(525, 300, text='Game Over', fill='red', font=('Courier', 60))
        canvas.itemconfig(label, text="Score: "+str(ball.score))

tk = Tk()
tk.title("User's Pong Game")
tk.resizable(0, 0)
tk.wm_attributes("-topmost", 1)
canvas = Canvas(tk, width=1000, height=800, bd=0, highlightthickness=0)
canvas.configure(background='black')
canvas.grid (row = 0)
label = canvas.create_text(5, 5, anchor=NW, text="Score: 0", font=('Courier, 40'), fill='white')
Button = Button(tk, anchor=NE, text = "Start Over", command = restart)
Button.grid(row=1, column=1)

tk.configure(background='white')

main ()

从tkinter导入*
随机输入
导入时间
导入pygame
导入操作系统，系统
导入时间
班级舞会：
定义初始（自我、画布、桨、颜色）：
self.canvas=画布
自桨
self.id=canvas.create_oval（10,10,25,25，fill='red'）
self.canvas.move（self.id，245100）
开始=[-3，-2，-1,1,2,3]
随机。洗牌（开始）
self.x=开始[0]
self.y=-3
self.canvas_height=self.canvas.winfo_height（）
self.canvas_width=self.canvas.winfo_width（）
self.hit_bottom=False
self.score=0
def hit_挡板（自身，位置）：
palle\u pos=self.canvas.coords（self.palle.id）
如果位置[2]>=拨杆位置[0]和位置[0]=拨杆位置[1]和位置[3]更换：

canvas.itemconfig(label, text="Score: "+str(ball.score))

与：

在
重新启动
方法中


我是如何调试它的：

复制并运行整个代码，尝试按钮，看到分数静态为0
在脚本中搜索“Score”以查看它在脚本中的修改位置
注意到缺少时间，因此解决了它
乒乓球游戏有什么特别之处使它无法重新启动？什么是重新启动乒乓球游戏？
while 1:
    if ball.hit_bottom == False:
        ball.draw()
        paddle.draw()
    tk.update_idletasks()
    tk.update()
    time.sleep(0.01)
    if ball.hit_bottom == True:
        canvas.create_text(525, 300, text='Game Over', fill='red', font=('Courier', 60))
    canvas.itemconfig(label, text="Score: "+str(ball.score))