Aenderung der Reihenfolge, erst Definition von Ball und Paddle, dann kann das Spielfeld darauf zugreifen

pingpong.py

@@ -5,21 +5,10 @@
 
 #-----------------------------------------------------------------
 # Import der einzelnen Module
-import random as r
+import random
 import time
 from Tkinter import *
 
-# ----------------------------------------------------------------
-# Spieloberflaeche
-
-tk = Tk()
-tk.title("Superfantastisches Ping-Pong-Spiel")
-canvas = Canvas(tk, width=500, height=400, bd=3, bg='pink')
-canvas.pack()
-label = canvas.create_text(10, 10, anchor=NW, text="Punktestand: 0")
-tk.update()
-paddle = Paddle(canvas, 'black')
-ball = Ball(canvas, 'white', 25, paddle)
 
 #----------------------------------------------------------------
 # Eigenschaften des Balles definieren
@@ -71,6 +60,7 @@ class Ball():
 
 	return False
 
+
 #---------------------------------------------------------------------------
 # Eigenschaften des Paddles definieren
 
@@ -83,7 +73,7 @@ class Paddle:
 	self.canvas.move(self.id, 200, 300)
 	self.xspeed = 0
 	self.canvas.bind_all('<KeyPress-Right>', self.move_right)
-        self.canvas.bind_all('<KeyPress-left>', self.move_left)
+        self.canvas.bind_all('<KeyPress-Left>', self.move_left)
 
 
     def draw(self):
@@ -104,4 +94,16 @@ class Paddle:
     def move_right(self, evt):
 	self.xspeed = 2
 
+
 #----------------------------------------------------------------------------
+# Spieloberflaeche
+
+tk = Tk()
+tk.title("Superfantastisches Ping-Pong-Spiel")
+canvas = Canvas(tk, width=500, height=400, bd=3, bg='pink')
+canvas.pack()
+label = canvas.create_text(10, 10, anchor=NW, text="Punktestand: 0")
+tk.update()
+paddle = Paddle(canvas, 'black')
+ball = Ball(canvas, 'white', 25, paddle)
+