1. Error Message
multiprocessing.pool.MaybeEncodingError: Error sending result: '[<backtrader.cerebro.OptReturn object at 0x000002DF30503CF8>]'. Reason: 'PicklingError("Can't pickle <class 'backtrader.metabase.AutoInfoClass_7b18485c665643a9b59eb66411db33ad_2823.HK'>: attribute lookup AutoInfoClass_7b18485c665643a9b59eb66411db33ad_2823.HK on backtrader.metabase failed",)'
2. stdstats
cerebro = bt.Cerebro(stdstats=False)
按官方文档说，当加入其他Observers，便要stdstats=False，否则会引致错误
3. Official doc
https://www.backtrader.com/docu/observers-and-statistics/observers-and-statistics/
标签：sending,MaybeEncodingError,Backtrader,stdstats,result,Error,pool From： https://www.cnblogs.com/chenkuang/p/16935341.html