def __init__(self, gl_type):
        assert (GL_BYTE, GL_SHORT, GL_INT, GL_FLOAT, GL_DOUBLE) in gl_type, \
            'Normal attribute must have signed type'
        super(NormalAttribute, self).__init__(3, gl_type)
dataset/ETHPy150Open ardekantur/pyglet/pyglet/graphics/vertexattribute.py/NormalAttribute.__init__/swapped operands of `in`