def groups_option(f):
    new_func = click.option("-g", "--groups",
                            help="Comma-separated list of requirement groups "
                            "to include.")(f)
    return update_wrapper(new_func, f)
def test_both():
    """Both f and g."""
    p = are.above(2) & are.below(4)
    ps = [p(x) for x in range(1, 6)]
    assert ps == [False, False, True, False, False]