from tkinter import*
import time
import random

class Ball:

def __init__(self,canvas,paddle,color):    self.canvas = canvas    self.paddle = paddle    self.id = canvas.create_oval(10,10,25,25,fill=color)    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 = Falsedef 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 Falsedef draw(self):    self.canvas.move(self.id,self.x,self.y)    pos = self.canvas.coords(self.id)    if pos[1] <= 0:        self.y = 4    if pos[3] >= self.canvas_height:        self.hit_bottom=True    if self.hit_paddle(pos)==True:        self.y=-4    if pos[0] <= 0:        self.x = 4    if pos[2] >= self.canvas_width:        self.x = -4

class Paddle:

def __init__(self,canvas,color):    self.canvas = canvas    self.id = canvas.create_rectangle(0,0,100,10,fill=color)    self.canvas.move(self.id,200,400)    self.x=0    self.canvas_width = self.canvas.winfo_width()    canvas.bind_all('<KeyPress-Left>',self.turn_left)    canvas.bind_all('<KeyPress-Right>',self.turn_right)    self.hit_bottom = Falsedef draw(self):    self.canvas.move(self.id,self.x,0)    pos = self.canvas.coords(self.id)    if pos[0] <= 0:        self.x = 0    elif pos[2] >= self.canvas_width:        self.x = 0def turn_left(self,evt):    self.x=-7def turn_right(self,evt):    self.x=7     

tk = Tk()
tk.title("反弹吧！球球")跟单网

tk.resizable(0,0)

tk.wm_attributes("-topmost",1)
canvas = Canvas(tk,width=650,height=600,bd=0,highlightthickness=0)
canvas.pack()
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)

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