def test_phase_setter(self, pauli, phase):
"""Test phase setter"""
pauli = Pauli(pauli)
pauli.phase = phase
_, coeff = _split_pauli_label(str(pauli))
value = _phase_from_label(coeff)
self.assertEqual(value, phase)
def operator_from_label(label):
"""Construct operator from full Pauli group label"""
pauli, coeff = _split_pauli_label(label)
coeff = (-1j)**_phase_from_label(coeff)
return coeff * Operator.from_label(pauli)
def test_phase(self, label):
"""Test phase attribute"""
pauli = Pauli(label)
_, coeff = _split_pauli_label(str(pauli))
target = _phase_from_label(coeff)
self.assertEqual(pauli.phase, target)
