BUG: use isinstance
BUG: use isinstance

humdings/zipline,humdings/zipline,florentchandelier/zipline,enigmampc/catalyst,florentchandelier/zipline,alphaBenj/zipline,alphaBenj/zipline,quantopian/zipline,enigmampc/catalyst,quantopian/zipline,bartosh/zipline,bartosh/zipline,Scapogo/zipline,Scapogo/zipline