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AttributeError: 'Ball' object has no attribute 'hit_paddle'
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AttributeError: 'Ball' object has no attribute 'hit_paddle'
#1
Beginner here. I can't figure out where I went wrong. Can someone help me?

Error:
Python 3.6.3 (v3.6.3:2c5fed8, Oct 3 2017, 17:26:49) [MSC v.1900 32 bit (Intel)] on win32 Type "copyright", "credits" or "license()" for more information. >>> RESTART: C:\Users\Anthony\AppData\Local\Programs\Python\Python36-32\paddlebounce.py Traceback (most recent call last): File "C:\Users\Anthony\AppData\Local\Programs\Python\Python36-32\paddlebounce.py", line 77, in <module> ball.draw() File "C:\Users\Anthony\AppData\Local\Programs\Python\Python36-32\paddlebounce.py", line 24, in draw if self.hit_paddle(pos) == True: AttributeError: 'Ball' object has no attribute 'hit_paddle' >>>
This is the code.

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()
        
    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.y = -3
        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 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, 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=400, bd=0, highlightthickness=0)
canvas.pack()
tk.update()

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

while 1:
    ball.draw()
    paddle.draw()
    tk.update_idletasks()
    tk.update()
    time.sleep(0.01)
    
Reply
#2
Indeed Ball class does not have hit_paddle() method. Only Paddle class has it.
Probably you want to do
if self.paddle.hit_paddle(pos):
Note that you should not compare boolean to True or False, just use that hit_paddle() already returns bool
If you can't explain it to a six year old, you don't understand it yourself, Albert Einstein
How to Ask Questions The Smart Way: link and another link
Create MCV example
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