def _set_verts(self, vertices):
        auto_order_vertices = True
        self.verts = (Vec2d * len(vertices))
        self.verts = self.verts(Vec2d(0, 0))
        
        i_vs = enumerate(vertices)
        if auto_order_vertices and not u.is_clockwise(vertices):
            i_vs = zip(range(1-len(vertices), -1, -1), vertices)
        
        for (i, vertex) in i_vs:
            self.verts[i].x = vertex[0]
            self.verts[i].y = vertex[1]
dataset/ETHPy150Open estevaofon/angry-birds-python/pymunk-4.0.0/pymunk/__init__.py/Poly._set_verts/swapped operands of `-`