def test_renormalize():
operator = QubitOperator(((1, 'X'), (3, 'Y'), (8, 'Z')), 1)
operator += QubitOperator(((2, 'Z'), (3, 'Y')), 1)
operator.renormalize()
for term in operator.terms:
assert operator.terms[term] == pytest.approx(1 / numpy.sqrt(2.))
assert operator.induced_norm(2) == pytest.approx(1.)
def test_renormalize_error():
operator = QubitOperator()
with pytest.raises(ZeroDivisionError):
operator.renormalize()