tushare的ts.pro_bar方法报错'str' object has no attribute 'daily'是怎么回事？

源代码为df = ts.pro_bar(ts_code='000001.SZ', adj='qfq', start_date='20180101', end_date='20181011', api="")

缺一个参数api=pro
pro = ts.pro_api('你的token码')