Kontrola czy dane pole jest osiągalne - messagebox

Restaurant/main.py

@@ -3,6 +3,10 @@ import random
 import time
 import queue
 import math
+from tkinter import messagebox
+import tkinter as tk
+root = tk.Tk()
+root.withdraw()     #ukrycie okna tworzonego przez tkinter
 
 pygame.init()
 
@@ -350,6 +354,11 @@ class Waiter(object):
     def goByAStar(self, end):
         positionList = aStar(self.pos, end)
         print(positionList)
+        if len(positionList) == 0:
+            messagebox.showerror("BŁĄD!", "Wybrano nieosiągalne pole!")
+            pygame.quit()
+            exit()
+        else:
             lenght = len(positionList) - 1
             for i in range(lenght):
                 movex = positionList[i + 1][0] - positionList[i][0]
@@ -367,9 +376,6 @@ class Waiter(object):
 
                 howToRotate = prevDirection - self.direction    #działa!
 
-            print(prevDirection)
-            print(self.direction)
-            print(howToRotate)
                 if howToRotate < 0:
                     self.rotate = "left"
                     self.rotationNumber = abs(howToRotate)
@@ -380,13 +386,13 @@ class Waiter(object):
                     self.rotate = "forward"
                     self.rotationNumber = 0
 
-            print(self.rotate)
+                #print(self.rotate)
 
                 for i in range(self.rotationNumber):
                     redrawWindow(window)
                     time.sleep(0.5)
                 self.rotate = "forward"
-            self.rotationNumber -= 0
+                self.rotationNumber = 0
 
                 self.goForward(movex, movey)
                 redrawWindow(window)
@@ -471,7 +477,7 @@ def main():
         clock.tick(60)
         redrawWindow(window)
         #bot.moveRandomly()
-        goal = (1, 5)
+        goal = (1, 3)
         bot.goByAStar(goal)
         time.sleep(60)
         flag = False