PYTHON 下載baostock中滬深300的數據，怎麽文件是空的，只有標題壹行，無數據，幫忙，謝謝

rs = bs.query_history_k_data("sh.399300","date,code,close,peTTM,turn,",start_date='2020-04-01', end_date='2020-05-29',frequency="d", adjustflag="3")

上面改成下面這句

rs = bs.query_history_k_data("sz.399300","date,code,close,peTTM,turn",start_date='2020-04-01', end_date='2020-05-29',frequency="d", adjustflag="3")