Changed if len(history): to if history:
Changed if len(history): to if history:
pmclanahan/heroku-buildpack-python-peep,stalnacke/heroku-buildpack-python,Scalingo/python-buildpack,monological/heroku-buildpack-python-opencv,pkumar-appd/python-buildpack,adamroth/heroku-buildpack-python-pdftk,AltSchool/heroku-buildpack-python,markine/heroku-buildpack-python,blazekadam/open2,YoApp/heroku-buildpack-python-twemproxy,HanSooloo/heroku-buildpack-python,ywarezk/heroku-buildpack-geodjango,jimlindeman/python-buildpack-collectd,andrespires/python-buildpack,hsr-ba-fs15-dat/heroku-buildpack,samuelhavron/heroku-buildpack-python,nadirizr/heroku-buildpack-python-gulp,edenspiekermann-amsterdam/heroku-buildpack-python,slorg1/heroku-buildpack-python,benjaminfox/heroku-buildpack-python-geoip,liyanchang/cloudfoundary-buildbot-buildpack,HousekeepLtd/heroku-buildpack-python,marcospy/hackathon-globo-app,brightforme/heroku-buildpack-python,alexflanagan/operand-buildpack-python,dulaccc/heroku-buildpack-geodjango,igroff/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,ojacobson/heroku-buildpack-python,brianthomas/heroku-buildpack-textmining,dubsmash/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,Nazanin84/python-buildpack,nicktimko/heroku-buildpack-scipy,RobertSundling/heroku-buildpack-python-nginx,maxcountryman/heroku-buildpack-python,doda/heroku-buildpack-python,cortexintel/heroku-buildpack-scipy,cdht/heroku-buildpack-python,PerceptumNL/heroku-buildpack-python,buildbot/buildbot-master-buildpack,papaeye/heroku-buildpack-python-bower,kvarga/heroku-buildpack-python,junyoed/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,joshowen/heroku-buildpack-python,Brogency/heroku-buildpack-python-gulp,ad-m/heroku-buildpack-python,Mause/heroku-buildpack-python,zakdoek/heroku-buildpack-django,rapilabs/heroku-buildpack-python,AltSchool/heroku-buildpack-python,martingascon/heroku-buildpack-python,18F/python-buildpack,nikita-pivovarov/heroku-buildpack-python-ldap,andrespires/python-buildpack,guidowb/buildpack-python,grivescorbett/heroku-buildpack-python,mythmon/heroku-buildpack-python-nodejs,pwdel1/heroku-buildpack-scipy,WonderThink/heroku-buildpack-python-ffmpeg-geoip,andela-brotich/wger-buildpack-python,gitricko/apt-python-buildpack,predata/heroku-buildpack-scipy,amanjain/heroku-buildpack-python-with-django-bower,kowito/python-buildpack,dvreed/heroku-buildpack-python-ldap,pkumar-appd/python-buildpack,agriffis/heroku-buildpack-python,bobsilverberg/heroku-buildpack-python-peep,Nazanin84/python-buildpack,Scalingo/python-buildpack,pkumar-appd/python-buildpack,beni55/heroku-buildpack-python,cloudfoundry/python-buildpack,plangrid/heroku-buildpack-python,maciejgryka/heroku-buildpack-spcedge,liyanchang/cloudfoundary-buildbot-buildpack,wbrefvem/heroku-buildpack-python,andrespires/python-buildpack,integricho/heroku-buildpack-python-ffmpeg2.1-with-codecs,joshisa/python-buildpack,swanson/heroku-buildpack-python-ortools,cloudfoundry/python-buildpack,zakdoek/heroku-buildpack-django,cloudfoundry/python-buildpack,nwkotto/geodjango-buildpack-with-geos,thenovices/heroku-buildpack-scipy,ruscoder/heroku-buildpack-python,icoxfog417/heroku-buildpack-python,Nazanin84/python-buildpack,heroku/heroku-buildpack-python,benjaminfox/heroku-buildpack-python-geoip,scrapinghub/scrapinghub-buildpack-scrapy,jimlindeman/python-buildpack-collectd,joshisa/python-buildpack,joshisa/python-buildpack,ad-m/heroku-buildpack-python,projetoeureka/heroku-buildpack-scipy,guidowb/buildpack-python,sjtuadamyang/adamyang-buildpack-python-libjpeg,18F/python-buildpack,xica/heroku-buildpack-scipy,ianyh/heroku-buildpack-python-bower,jimlindeman/python-buildpack-collectd,liyanchang/buildbot-master-buildpack,benmurden/heroku-buildpack-python-ember,guidowb/buildpack-python,edmorley/heroku-buildpack-python,pebble/cloudpebble-buildpack,18F/python-buildpack,jvenezia/heroku-buildpack-python,ephemerallabs/heroku-buildpack-python,loanzen/heroku-buildpack-python,liyanchang/cloudfoundary-buildbot-buildpack,manufacturedba/heroku-buildpack-python,ekkleesia2/heroku-buildpack-python,vlidholt/heroku-buildpack-scipy,Stibbons/heroku-buildpack-python-installer,nemesiscodex/heroku-buildpack-python,driftyco/heroku-buildpack-sphinx,river-jade/heroku-buildpack-scipy,arnaudlimbourg/heroku-buildpack-python,marcospy/heroku-buildpack-scipy,rbtying/heroku-buildpack-python,rollokb/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,miraculixx/heroku-buildpack-python,Apogaea/heroku-buildpack-python,tommyvn/heroku-buildpack-python,marianzange/heroku-buildpack-python,jamarparris/heroku-buildpack-python-swig,gitricko/apt-python-buildpack,benmurden/heroku-buildpack-python-ember,joshfriend/heroku-buildpack-python,TipWander/heroku-buildpack-geodjango,oberlin/heroku-buildpack-python,kowito/python-buildpack,soapril/heroku-buildpack-python,resmio/heroku-buildpack-geodjango,cclauss/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,swils/heroku-buildpack-python,marcospy/hackathon-globo-app,mobify/heroku-buildpack-python-swig,skilljar/heroku-buildpack-python,heroku/heroku-buildpack-python,lukaszkorecki/heroku-buildpack-python,wbrefvem/heroku-buildpack-python,DylanLukes/heroku-buildpack-python,gaumire/heroku-buildpack-python,marcospy/hackathon-globo-app,samuelhavron/heroku-buildpack-python,gitricko/apt-python-buildpack,smalleats/heroku-buildpack-python,alexflanagan/operand-buildpack-python,samuelhavron/heroku-buildpack-python,ryanhiebert/heroku-buildpack-python,Tiger66639/buildbot-master-buildpack,doda/heroku-buildpack-python,kowito/python-buildpack