(self)
Called after update during each iteration of
        the event loop. Put OpenGL rendering calls
        here.
Called after update during each iteration of
        the event loop. Put OpenGL rendering calls
        here.
Called after update during each iteration of the event loop . Put OpenGL rendering calls here .
def draw(self):
        """
        Called after update during each iteration of
        the event loop. Put OpenGL rendering calls
        here.
        """
        pass
def draw ( self ) : pass