Python：如何从类中删除对象？

我是python新手，在对象类方面有点麻烦。我已经创建了一些代码，让球对象从墙上反弹。我想在点击一个球后删除它。我尝试过几种不同的方法，但都会导致错误。下面是我对从墙上弹起的球的代码。如何编辑此代码以在单击球后将其删除？谢谢

from Tkinter import *
import random
import time

canvasWidth=480
canvasHeight=320


root= Tk()
canvas=Canvas(root,width=canvasWidth,height=canvasHeight, bg='white')
root.title('RaspPi')
canvas.pack()

class Ball:
    def __init__(self):
            self.ballSize = 30
            self.xposition = random.randint(0 + self.ballSize, canvasWidth - self.ballSize)
            self.yposition = random.randint(0 + self.ballSize, canvasHeight - self.ballSize)
            self.shape=canvas.create_oval(self.xposition,self.yposition,self.xposition+self.ballSize,self.yposition+self.ballSize, fill='black',activefill="grey",width=0)
            self.xspeed = random.randrange(-3,3)
            self.yspeed = random.randrange(-3,3)



    def move(self):
        canvas.move(self.shape, self.xspeed, self.yspeed)
        pos = canvas.coords(self.shape)
        if pos[2] >= canvasWidth or pos[0] <= 0:
            self.xspeed = -self.xspeed
        if pos[3] >= canvasHeight or pos[1] <= 0:
            self.yspeed = -self.yspeed


balls=[]
for i in range(20):
    balls.append(Ball())

while True:
    for ball in balls:
        ball.move()

    root.update()
    time.sleep(0.01)

root.mainloop()

从Tkinter导入*
随机输入
导入时间
画布宽度=480
画布高度=320
root=Tk（）
画布=画布（根，宽度=画布宽度，高度=画布高度，bg='white'）
root.title（'RaspPi'）
canvas.pack（）
班级舞会：
定义初始化（自）：
自球尺寸=30
self.xposition=random.randint（0+self.ballSize，canvasWidth-self.ballSize）
self.yposition=random.randint（0+self.ballSize，canvasHeight-self.ballSize）
self.shape=canvas.create_oval（self.xposition，self.yposition，self.xposition+self.ballSize，self.yposition+self.ballSize，fill='black'，activefill='grey'，width=0）
self.xspeed=random.randrange（-3,3）
self.yspeed=random.randrange（-3,3）
def移动（自我）：
canvas.move（self.shape、self.xspeed、self.yspeed）
pos=画布坐标（自形）
如果pos[2]>=canvasWidth或pos[0]=canvasHeight或pos[1]使用类canvas的bind方法并删除单击的椭圆。for循环应该具有异常处理，因为删除的对象不能具有坐标或速度。del（）函数通常用于删除对象

from Tkinter import *
import random
import time

canvasWidth = 480
canvasHeight = 320

root = Tk()
canvas = Canvas(root, width=canvasWidth, height=canvasHeight, bg='white')
root.title('RaspPi')
canvas.pack()


class Ball:
    def __init__(self):
            self.ballSize = 30
            self.xposition = random.randint(0 + self.ballSize, canvasWidth - self.ballSize)
            self.yposition = random.randint(0 + self.ballSize, canvasHeight - self.ballSize)
            self.shape=canvas.create_oval(self.xposition,self.yposition,self.xposition+self.ballSize,self.yposition+self.ballSize, fill='black',width=0)
            self.xspeed = random.randrange(-3,3)
            self.yspeed = random.randrange(-3,3)

    def move(self):
        canvas.move(self.shape, self.xspeed, self.yspeed)
        pos = canvas.coords(self.shape)
        if pos[2] >= canvasWidth or pos[0] <= 0:
            self.xspeed = -self.xspeed
        if pos[3] >= canvasHeight or pos[1] <= 0:
            self.yspeed = -self.yspeed


balls=[]
for i in range(20):
    balls.append(Ball())


def click(event):
    if canvas.find_withtag(CURRENT):
        canvas.delete(CURRENT)

canvas.bind("<Button-1>", click)

while True:
    for ball in balls:
        try:
            ball.move()
        except:
            del(ball)

    root.update()
    time.sleep(0.01)

root.mainloop()

这似乎是tkinter端的问题，而不是Python端的问题。errr，只要从
balls
列表中删除相应的实例，删除的对象就不会被迭代。这似乎与“从[a]类中删除对象”无关。您需要阅读Tkinter API才能了解如何从游戏中删除对象。@Jean-Françoisfare Tkinter窗口中仍将显示这些对象。它们也需要从画布上删除。非常感谢！！有没有不使用“尝试和例外”的方法来执行此操作？谢谢！你是最棒的！
from Tkinter import *
import random
import time

canvasWidth = 480
canvasHeight = 320

root = Tk()
canvas = Canvas(root, width=canvasWidth, height=canvasHeight, bg='white')
root.title('RaspPi')
canvas.pack()


class Ball:
    def __init__(self):
            self.ballSize = 30
            self.xposition = random.randint(0 + self.ballSize, canvasWidth - self.ballSize)
            self.yposition = random.randint(0 + self.ballSize, canvasHeight - self.ballSize)
            self.shape=canvas.create_oval(self.xposition,self.yposition,self.xposition+self.ballSize,self.yposition+self.ballSize, fill='black',width=0)
            self.xspeed = random.randrange(-3,3)
            self.yspeed = random.randrange(-3,3)

    def move(self):
        canvas.move(self.shape, self.xspeed, self.yspeed)
        pos = canvas.coords(self.shape)
        if len(pos) != 0:
            if pos[2] >= canvasWidth or pos[0] <= 0:
                self.xspeed = -self.xspeed
            if pos[3] >= canvasHeight or pos[1] <= 0:
                self.yspeed = -self.yspeed
        else:
            del(self)




balls=[]
for i in range(20):
    balls.append(Ball())


def click(event):
    if canvas.find_withtag(CURRENT):
        canvas.delete(CURRENT)

canvas.bind("<Button-1>", click)

while True:
    for ball in balls:
        ball.move()

    root.update()
    time.sleep(0.01)

root.mainloop()