MAINT: Explicitly convert map to list when converting answer key values.
MAINT: Explicitly convert map to list when converting answer key values.

For compatibility with iterator version of map in Python 3.

Also always use iterator version of map,
so that code path is exercised in Python 2.

sketchytechky/zipline,jordancheah/zipline,mattcaldwell/zipline,CDSFinance/zipline,ronalcc/zipline,erikness/AlephOne,stkubr/zipline,dhruvparamhans/zipline,YuepengGuo/zipline,erikness/AlephOne,florentchandelier/zipline,dkushner/zipline,Scapogo/zipline,stkubr/zipline,nborggren/zipline,MonoCloud/zipline,cmorgan/zipline,bartosh/zipline,keir-rex/zipline,aajtodd/zipline,euri10/zipline,chrjxj/zipline,ronalcc/zipline,michaeljohnbennett/zipline,zhoulingjun/zipline,joequant/zipline,enigmampc/catalyst,joequant/zipline,jordancheah/zipline,sketchytechky/zipline,quantopian/zipline,magne-max/zipline-ja,MonoCloud/zipline,wubr2000/zipline,bartosh/zipline,iamkingmaker/zipline,humdings/zipline,otmaneJai/Zipline,gwulfs/zipline,DVegaCapital/zipline,euri10/zipline,grundgruen/zipline,Scapogo/zipline,umuzungu/zipline,dmitriz/zipline,StratsOn/zipline,ChinaQuants/zipline,umuzungu/zipline,kmather73/zipline,grundgruen/zipline,StratsOn/zipline,florentchandelier/zipline,alphaBenj/zipline,wilsonkichoi/zipline,AlirezaShahabi/zipline,zhoulingjun/zipline,jimgoo/zipline-fork,alphaBenj/zipline,ChinaQuants/zipline,humdings/zipline,wilsonkichoi/zipline,DVegaCapital/zipline,YuepengGuo/zipline,quantopian/zipline,AlirezaShahabi/zipline,mattcaldwell/zipline,dkushner/zipline,chrjxj/zipline,cmorgan/zipline,dmitriz/zipline,magne-max/zipline-ja,kmather73/zipline,semio/zipline,keir-rex/zipline,iamkingmaker/zipline,CDSFinance/zipline,morrisonwudi/zipline,dhruvparamhans/zipline,morrisonwudi/zipline,enigmampc/catalyst,aajtodd/zipline,gwulfs/zipline,wubr2000/zipline,otmaneJai/Zipline,michaeljohnbennett/zipline,nborggren/zipline,semio/zipline,jimgoo/zipline-fork