def test_angle(self):
a = VMD(1,0,0);
b = VMD(0,1,0);
self.assertAlmostEqual(a.angle(b), math.pi/2, places=4);
def test_angle(self):
a = VMD(1, 0, 0)
b = VMD(0, 1, 0)
self.assertAlmostEqual(a.angle(b), math.pi / 2, places=4)
