Bounce game, using Python 3 & Tkinter

paddleball.py

from tkinter import *
import random
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=color)

		starts = [-3, -2, -1, 1, 2, 3]
		random.shuffle(starts)

		self.x = starts[0]
		self.y = -3
		self.canvas_height = canvas.winfo_height()
		self.canvas_width = canvas.winfo_width()

		self.is_hitting_bottom = False

		canvas.move(self.id, 245, 100)

	def draw(self):
		self.canvas.move(self.id, self.x, self.y)

		pos = self.canvas.coords(self.id)

		if pos[1] <= 0:
			self.y = 1

		if pos[3] >= self.canvas_height:
			# self.y = -1
			self.is_hitting_bottom = True

		if self.hit_top_paddle(pos) == True:
			self.y = -3

		if self.hit_bottom_paddle(pos) == True:
			self.y = 1

		if pos[0] <= 0:
			self.x = 3

		if pos[2] >= self.canvas_width:
			self.x = -3

	def hit_top_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 hit_bottom_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[1] >= paddle_pos[1] and pos[1] <= paddle_pos[3]:
				return True

		return False

class Paddle:
	def __init__(self, canvas, color):
		self.canvas = canvas
		self.id = canvas.create_rectangle(0, 0, 100, 10, fill=color)

		self.x = 0
		self.canvas_width = canvas.winfo_width()

		canvas.move(self.id, 200, 300)

		canvas.bind_all('<KeyPress-Left>', self.move_left)
		canvas.bind_all('<KeyPress-Right>', self.move_right)

	def draw(self):
		self.canvas.move(self.id, self.x, 0)

		pos = self.canvas.coords(self.id)

		if pos[0] <= 0:
			self.x = 0

		if pos[2] >= self.canvas_width:
			self.x = 0

	def move_left(self, event):
		self.x = -2

	def move_right(self, event):
		self.x = 2

tk = Tk()
tk.title('Game')
canvas = Canvas(tk, width=550, height=400, bd=0, highlightthickness=0)
canvas.pack()
tk.update()

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

while 1:
	if ball.is_hitting_bottom == False:
		ball.draw()
		paddle.draw()

	tk.update_idletasks()
	tk.update()
	time.sleep(0.01)

Nice game!

I tried running it, it doesn't work, for some reason.
The tkinter functions inside the Ball Class don't work.

Feelinc, you said you didn't know if you wrote this or copied it, it is from https://nostarch.com/pythonforkids.