fix undefined name
fix undefined name

yungchin/pykafka,yungchin/pykafka,benauthor/pykafka,thedrow/samsa,aeroevan/pykafka,jofusa/pykafka,jofusa/pykafka,thedrow/samsa,benauthor/pykafka,aeroevan/pykafka,sontek/pykafka,wikimedia/operations-debs-python-pykafka,fortime/pykafka,wikimedia/operations-debs-python-pykafka,appsoma/pykafka,appsoma/pykafka,sammerry/pykafka,wikimedia/operations-debs-python-pykafka,sammerry/pykafka,vortec/pykafka,fortime/pykafka,sontek/pykafka,thedrow/samsa,tempbottle/pykafka,vortec/pykafka,benauthor/pykafka,tempbottle/pykafka