``False``)
    - ``asKeyword`` and ``useRegex`` are retained for pre-PEP8 compatibility,
      but will be removed in a future release

    Example::

        comp_oper = one_of("< = > <= >= !=")
        var = Word(alphas)
        number = Word(nums)
        term = var | number
        comparison_expr = term + comp_oper + term
        print(comparison_expr.search_string("B = 12  AA=23 B<=AA AA>12"))

    prints::

        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
    z`More than one string argument passed to one_of, pass choices as a list or space-delimited string