单只股票的alpha191没办法求

[zzb980881]

报一下错误
File "D:\06_projects\python\stock_trade\alphas191.py", line 62, in <module> alpha_001 = l.alpha_001(OPEN=OPEN, CLOSE=CLOSE, VOLUME=VOLUME) File "D:\ProgramData\Anaconda3\envs\py38\lib\site-packages\ta_cn\alphas\alpha191.py", line 14, in alpha_001 return (-1 * CORR(RANK(DELTA(LOG(VOLUME), 1)), RANK(((CLOSE - OPEN) / OPEN)), 6)) File "D:\ProgramData\Anaconda3\envs\py38\lib\site-packages\ta_cn\utils_long.py", line 112, in decorated return pd.Series(s3, index=s1.index) File "D:\ProgramData\Anaconda3\envs\py38\lib\site-packages\pandas\core\series.py", line 386, in __init__ if is_empty_data(data) and dtype is None: File "D:\ProgramData\Anaconda3\envs\py38\lib\site-packages\pandas\core\construction.py", line 877, in is_empty_data is_simple_empty = is_list_like_without_dtype and not data File "D:\ProgramData\Anaconda3\envs\py38\lib\site-packages\pandas\core\generic.py", line 1527, in __nonzero__ raise ValueError( ValueError: The truth value of a DataFrame is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

而且，dataframe的索引还必须设置asset，不然报错，这是什么原因？难道不能单独求值？

[wukan1986]

由于已经有了新的想法，所以，这个项目基本已经不维护了，请使用polars_ta这个项目