def cut_nones(presults, mresults):
    """Cut entries that are None in a pair of lists. Any entry that is None
    in either list will exclude the item in the other.

    Parameters
    ----------
    presults : list
        One the list of things.
    mresults : list
        The other list of things.

    Returns
    -------
    pcut : list
        The cut list.
    mcut : list
        The cut list.
    """
    prr_keep = []
    mrr_keep = []
    for pr, mr in zip(presults, mresults):
        if pr is None or mr is None:
            continue
        prr_keep.append(pr)
        mrr_keep.append(mr)

    return prr_keep, mrr_keep