def test_jacobian_self():
q = Array((num2, num3))
jac = q.jacobian(q)
assert jac[0, 0] == 1
assert jac[0, 1] == 0
assert jac[1, 0] == 0
assert jac[1, 1] == 1
def test_jacobian_scalar():
q = Array((num2, num3))
jac = q.jacobian(q[0])
assert jac[0] == 1
assert jac[1] == 0