95a3314789b0b19f68b803804e2c55be067ff884,qiskit/aqua/operators/common.py,,measure_pauli_z,#Any#Any#,43

Before Change

    observable = 0
    tot = sum(data.values())
    for key in data:
        value = 1
        for j in range(pauli.numberofqubits):
            if ((pauli.x[j] or pauli.z[j]) and
                    key[pauli.numberofqubits - j - 1] == "1"):
                value = -value
        // print(key, data[key])
        observable = observable + value * data[key] / tot
    return observable

    // observable = 0.0
    // num_shots = sum(data.values())

After Change

    
    observable = 0.0
    num_shots = sum(data.values())
    p_z_or_x = np.logical_or(pauli.z, pauli.x)
    for key, value in data.items():
        bitstr = np.asarray(list(key))[::-1].astype(np.bool)
        // pylint: disable=no-member
        sign = -1.0 if np.logical_xor.reduce(np.logical_and(bitstr, p_z_or_x)) else 1.0
        observable += sign * value
    observable /= num_shots
    return observable

Instances