def equal_combine(factor_df, factor_list, ):
    """
    等权法合成因子
    参数:
        factor_df: DataFrame, 待合成因子值
        factor_list: list, 待合成因子列表
    返回:
        DataFrame, 复合因子
    """
    factor_df = factor_df.copy()
    return factor_df[factor_list].mean(axis=1).values
    #factor_df['equal']= factor_df[factor_list].mean(axis=1)
    #return factor_df[['code', 'trade_date', 'equal']]