def get_zero_idx(res_array):
    """
    Returns list with indexes of zeros in res_array

    Parameters
    ----------
    res_array : np.array
        Numpy results array

    Returns
    -------
    list_idx : list (of ints)
        List holding zero indexes
    """

    list_idx = []

    for i in range(len(res_array)):
        if res_array[i] == 0:
            list_idx.append(i)

    return list_idx