def remove_collision_handler(self, a, b):
        """Remove a collision handler for a given collision type pair.
        
        :Parameters:
            a : int
                Collision type of the first shape
            b : int
                Collision type of the second shape
        """
        if self._handlers in (a, b):
            del self._handlers[(a, b)]
        cp.cpSpaceRemoveCollisionHandler(self._space, a, b)
dataset/ETHPy150Open estevaofon/angry-birds-python/pymunk-4.0.0/pymunk/__init__.py/Space.remove_collision_handler/swapped operands of `in`