获取股票信息

def _fetch_stock_data(self, stock_list):
        """获取股票信息"""
        pool = multiprocessing.pool.ThreadPool(len(stock_list))
        try:
            res = pool.map(self.get_stocks_by_range, stock_list)
        finally:
            pool.close()
        return [d for d in res if d is not None]