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这一行，https://github.com/wondertrader/wtpy/blob/master/wtpy/apps/WtBtAnalyst.py#L705 当df_2和every_series_loss为空的时候，f_2_result只有两个columns，这样在下面设定columns时会出错， ValueError: Length mismatch: Expected axis has 2 elements, new values have 3 elements
ValueError: Length mismatch: Expected axis has 2 elements, new values have 3 elements
The text was updated successfully, but these errors were encountered:
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这一行，https://github.com/wondertrader/wtpy/blob/master/wtpy/apps/WtBtAnalyst.py#L705
当df_2和every_series_loss为空的时候，f_2_result只有两个columns，这样在下面设定columns时会出错，
ValueError: Length mismatch: Expected axis has 2 elements, new values have 3 elementsThe text was updated successfully, but these errors were encountered: