I am learning python through a book, and there is a code for a simplified version of Pong. I wrote the code and I am getting continued error messages. Can anyone help? I am using 3.9.2 and attaching the code and error messages below.
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)
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
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
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,200,300)
self.x = 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)
def 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 = 0
def turn_left(self,evt):
self.x = -2
def turn_right(self,evt):
self.x = 2
tk=Tk()
tk.title=('Game')
tk.resizable(0,0)
tk.wm_attributes('-topmost', 1)
canvas = Canvas(tk, width=500, height=500, 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)
Error message: Traceback (most recent call last): File "/Users/bennettsullivan/Documents/BOUNCE!!!.py", line 77, in paddle = Paddle(canvas, 'blue') File "/Users/bennettsullivan/Documents/BOUNCE!!!.py", line 48, in init self.canvas.bind_all('', self.turn_left) File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/tkinter/init.py", line 1406, in bind_all return self._bind(('bind', 'all'), sequence, func, add, 0) File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/tkinter/init.py", line 1346, in _bind self.tk.call(what + (sequence, cmd)) _tkinter.TclError: bad event type or keysym "Keypress"
