def test_zero_coeff(self):
"""
test addition
"""
pauli_a = 'IXYZ'
pauli_b = 'IXYZ'
coeff_a = 0.5
coeff_b = -0.5
pauli_term_a = [coeff_a, label_to_pauli(pauli_a)]
pauli_term_b = [coeff_b, label_to_pauli(pauli_b)]
opA = Operator(paulis=[pauli_term_a])
opB = Operator(paulis=[pauli_term_b])
newOP = opA + opB
newOP.zeros_coeff_elimination()
self.assertEqual(0, len(newOP.paulis), "{}".format(newOP.print_operators()))
paulis = ['IXYZ', 'XXZY', 'IIZZ', 'XXYY', 'ZZXX', 'YYYY']
coeffs = [0.2, 0.6, 0.8, -0.2, -0.6, -0.8]
op = Operator(paulis=[])
for coeff, pauli in zip(coeffs, paulis):
pauli_term = [coeff, label_to_pauli(pauli)]
op += Operator(paulis=[pauli_term])
for i in range(6):
opA = Operator(paulis=[[-coeffs[i], label_to_pauli(paulis[i])]])
op += opA
op.zeros_coeff_elimination()
self.assertEqual(6-(i+1), len(op.paulis))
def test_zero_elimination(self):
pauli_a = 'IXYZ'
coeff_a = 0.0
pauli_term_a = [coeff_a, label_to_pauli(pauli_a)]
opA = Operator(paulis=[pauli_term_a])
self.assertEqual(1, len(opA.paulis), "{}".format(opA.print_operators()))
opA.zeros_coeff_elimination()
self.assertEqual(0, len(opA.paulis), "{}".format(opA.print_operators()))