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_impl(df):
            df2 = df[['A']]
            df2['A'] += 10
            return df2.A, df.A