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import tkinter
import random
 
#constant
WIDTH = 640
HEIGHT = 480
BG_COLOR = 'BLUE'
 
#mouse events
def mouse_click(event):
    global main_ball
    print(event.num, event.x, event.y)
    if event.num == 1:
        main_ball = Balls(event.x, event.y, 30, 'white')
        main_ball.draw()
    else:
        main_ball.hide()
 
 
#ball class
class Balls():
    def __init__(self, x, y, r, color, dx=0, dy=0):
        self.x = x
        self.y = y
        self.color = color
        self.r = r
        self.dx = dx
        self.dy = dy
    def draw(self):
        canvas.create_oval(self.x - self.r, self.y - self.r, self.x + self.r, self.y + self.r, fill=self.color)
    def hide(self):
        canvas.create_oval(self.x - self.r, self.y - self.r, self.x + self.r, self.y + self.r, fill=BG_COLOR,                   outline=BG_COLOR)
    def move(self):
        self.hide()
        self.x += self.dx
        self.y += self.dy
        self.draw()
 
 
 
#main cicle of game
    def main():
        if 'main_ball' in globals():
            main_ball.move()
    		root.after(10, main)
 
 
root = tkinter.Tk()
root.title('Dildo')
canvas = tkinter.Canvas(root, width=WIDTH, height=HEIGHT, bg=BG_COLOR)
canvas.pack()
canvas.bind('<Button-1>',mouse_click, '+')
canvas.bind('<Button-2>',mouse_click, '+')
canvas.bind('<Button-3>',mouse_click, '+')
main()
root.mainloop()

Traceback (most recent call last):
  File "/usr/lib/python3.4/py_compile.py", line 124, in compile
    _optimize=optimize)
  File "<frozen importlib._bootstrap>", line 1532, in source_to_code
  File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
  File "./prog.py", line 45
    root.after(10, main)
                       ^
TabError: inconsistent use of tabs and spaces in indentation

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.4/py_compile.py", line 128, in compile
    raise py_exc
py_compile.PyCompileError: Sorry: TabError: inconsistent use of tabs and spaces in indentation (prog.py, line 45)

Standard output is empty