UnboundLocalError: local variable 'period_len' referenced before assignment

quantopian / alphalens

Performance analysis of predictive (alpha) stock factors

http://quantopian.github.io/alphalens

Apache License 2.0

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Closed mwolf2 closed 3 years ago

smallsexydog commented 7 months ago

Hello! I am meeting the same problem with you now. Could you please tell me how did you solve it? Thank you!