Improve Python compatibility of build file.
Improve Python compatibility of build file.

Kaworru/blockly,CocoMake7/CocoBlockly,ChinJY/blockly,Jhara/blockly,OpenRoberta/blockly,shyamalschandra/blockly,daarond/blockly,faizshukri/blockly,trinketapp/blockly,MoziSong/blockly_dyn_devices,RealTimeWeb/blockly,mark-friedman/blockly,dhalupa/blockly,MaryS94/blockly,ymnk13/blockly,gengshenghong/scratch-blocks,kingoo/blockly,ylixir/blockly,carloslfu/blockly,Tinkerforge/tvpl-blockly,trodi/blockly,faizshukri/blockly,stefan-j/blockly,groklearning/blockly,simpleverso/blockly,Immortalin/blockly,xeecos/blockly,jstnhuang/blockly,Program-AR/blockly,mark-friedman/blockly,ChinJY/blockly,charlynz/blockly-adventure,jisqyv/blockly,moskalevkirll/blockly,edbutler/blockly,markocelan/blockly-minecraft,cdjackson/openhab-blockly,thr0w/blockly,hkoi/blockly,kingoo/blockly,carlosperate/blockly,groklearning/blockly,ralic/blockly,cmillani/blockly,carlosperate/ardublockly,prappo/blockly,paulweatherby/blockly,rachel-fenichel/blockly,nickmain/blockly,aninternetof/blockly,aseba-community/blockly,yhbest/blockly,google/blockly,gasolin/blockly,jstnhuang/blockly,stefan-j/blockly,shabesoglu/blockly,ralic/blockly,3agv2004/Programming,SheldonPacotti/blockly-enhancements,mark-friedman/blockly,carlosperate/blockly,ralic/blockly,stefan-j/blockly,aseba-community/blockly,adrgerez/ardublockly,marianoguerra/blockly,EinsteinsWorkshop/blockly,eclecticdave/blockly,griffpatch/scratch-blocks,caiograg/blockly,vinay5jan/blocklyExtended,UIKit0/blockly,RealTimeWeb/blockpy,UIKit0/blockly,Immortalin/blockly,zerar/blockly,nickmain/blockly,jordicamposmiralles/geoblockly,trinketapp/blockly,touqir14/blockly,LLK/scratch-blocks,Jhara/blockly,Grahack/blockly,mehrdadrafiee/blockly,twodee/blockly,markocelan/blockly-minecraft,thr0w/blockly,InspectorWidget/blockly,rdelhommer/BlocklyPrototypeEB,dhalupa/blockly,ensonic/blockly,xeecos/blockly,Jhara/blockly,ominux/blockly,simpleverso/blockly,OpenRoberta/blockly,edbutler/blockly,stefan-j/blockly,adrgerez/ardublockly,eclecticdave/blockly,sonwh98/blockly,EmergingTechnologyAdvisors/blockly,joshlory/blockly,shabesoglu/blockly,RealTimeWeb/blockpy,CocoMake7/CocoBlockly,OpenRoberta/blockly,faizshukri/blockly,EinsteinsWorkshop/blockly,rachel-fenichel/blockly,gupta137/blockly,MikeDX/blockly-div,andersschuller/blockly,orionhealth/blockly,MaryS94/blockly,EinsteinsWorkshop/blockly,charlynz/blockly-adventure,MikeDX/blockly-div,Grahack/blockly,groklearning/blockly,cdjackson/openhab-blockly,JackBDu/blockly,yhbest/blockly,picklesrus/blockly,josmas/blockly,cmillani/blockly,gengshenghong/scratch-blocks,sclements/scratch-blocks,google/blockly,aravart/speech-blocks,google/blockly,twodee/blockly,rachel-fenichel/blockly,drigz/blockly,jordicamposmiralles/geoblockly,orionhealth/blockly,nandhanurrevanth/blockly,drigz/blockly,EmergingTechnologyAdvisors/blockly,jano42/blockly,RealTimeWeb/blockly,griffpatch/scratch-blocks,g-rocket/blockly,andersschuller/blockly,griffpatch/scratch-blocks,carlosperate/ardublockly,aravart/speech-blocks,ocadotechnology/blockly,MoziSong/blockly_dyn_devices,altereagle/blockly,gabrielsanchez/blockly,CocoMake7/CocoBlockly,hybrideagle/blockly,markocelan/blockly-minecraft,toebes-extreme/blockly,TechplexEngineer/blockly,gengshenghong/scratch-blocks,carlosperate/blockly,ensonic/blockly,HALtheWise/blockly,g-rocket/blockly,josmas/blockly,andersschuller/blockly,mark-friedman/blockly,google/blockly-devtools,Andrews9008/blockly,carloslfu/blockly,RealTimeWeb/blockpy,jstnhuang/blockly,sclements/scratch-blocks,gasolin/blockly,Andrews9008/blockly,cdjackson/openhab-blockly,yhbest/blockly,Gamefroot/Gamefroot-Blockly,mark-friedman/blockly,sonwh98/blockly,google/blockly,gasolin/blockly,rasata/blockly,touqir14/blockly,in1004kyu/tokitool,sclements/scratch-blocks,caiograg/blockly,daarond/blockly,moskalevkirll/blockly,JackBDu/blockly,gengshenghong/scratch-blocks,google/blockly,Grahack/blockly,LLK/scratch-blocks,altereagle/blockly,griffpatch/scratch-blocks,Program-AR/blockly,twodee/blockly,thr0w/blockly,joshlory/blockly,hkoi/blockly,rachel-fenichel/blockly,sclements/scratch-blocks,Tinkerforge/tvpl-blockly,michalkilawok/blockly,toebes-extreme/blockly,jano42/blockly,josmas/blockly,nandhanurrevanth/blockly,caiograg/blockly,mark-friedman/blockly,gengshenghong/scratch-blocks,wakashige/blockly,lzairdking/blockly,mehrdadrafiee/blockly,dhalupa/blockly,xeecos/blockly,trinketapp/blockly,Andrews9008/blockly,LLK/scratch-blocks,smalruby/blockly,prappo/blockly,twodee/blockly,MoziSong/blockly_dyn_devices,gupta137/blockly,carlosperate/ardublockly,Gamefroot/Gamefroot-Blockly,HALtheWise/blockly,ominux/blockly,Kaworru/blockly,trodi/blockly,google/blockly,michalkilawok/blockly,trodi/blockly,gabrielsanchez/blockly,nickmain/blockly,thekoalaz/blockly,cmillani/blockly,3agv2004/Programming,gudtago/blockly,zerar/blockly,g-rocket/blockly,ylixir/blockly,ocadotechnology/blockly,Program-AR/blockly,nickmain/blockly,aninternetof/blockly,hybrideagle/blockly,rachel-fenichel/blockly,krahman/blockly,krahman/blockly,gudtago/blockly,zerar/blockly,simpleverso/blockly,rdelhommer/BlocklyPrototypeEB,3agv2004/Programming,twodee/blockly,hkoi/blockly,wakashige/blockly,prappo/blockly,InspectorWidget/blockly,ensonic/blockly,ymnk13/blockly,paulweatherby/blockly,rasata/blockly,LLK/scratch-blocks,lzairdking/blockly,rasata/blockly,groklearning/blockly,gudtago/blockly,daarond/blockly,ChinJY/blockly,ymnk13/blockly,hybrideagle/blockly,wakashige/blockly,marianoguerra/blockly,sonwh98/blockly,Kaworru/blockly,marianoguerra/blockly,jisqyv/blockly,orionhealth/blockly,jordicamposmiralles/geoblockly,UIKit0/blockly,eclecticdave/blockly,ylixir/blockly,MikeDX/blockly-div,touqir14/blockly,edbutler/blockly,OpenRoberta/blockly,thekoalaz/blockly,toebes-extreme/blockly,paulweatherby/blockly,smalruby/blockly,nickmain/blockly,michalkilawok/blockly,nandhanurrevanth/blockly,aninternetof/blockly,ominux/blockly,gupta137/blockly,ocadotechnology/blockly,google/blockly-devtools,vinay5jan/blocklyExtended,nickmain/blockly,drigz/blockly,HALtheWise/blockly,jstnhuang/blockly,shyamalschandra/blockly,sclements/scratch-blocks,jisqyv/blockly,jano42/blockly,shyamalschandra/blockly,griffpatch/scratch-blocks,rachel-fenichel/blockly,SheldonPacotti/blockly-enhancements,moskalevkirll/blockly,joshlory/blockly,twodee/blockly,vinay5jan/blocklyExtended,aseba-community/blockly,SheldonPacotti/blockly-enhancements,lzairdking/blockly,gabrielsanchez/blockly,EmergingTechnologyAdvisors/blockly,jano42/blockly,TechplexEngineer/blockly,in1004kyu/tokitool,InspectorWidget/blockly,trodi/blockly,carloslfu/blockly,google/blockly,Gamefroot/Gamefroot-Blockly,lzairdking/blockly,MaryS94/blockly,shabesoglu/blockly,thekoalaz/blockly,Gamefroot/Gamefroot-Blockly,adrgerez/ardublockly,kingoo/blockly,trinketapp/blockly,picklesrus/blockly,JackBDu/blockly,in1004kyu/tokitool,picklesrus/blockly,carlosperate/blockly,markocelan/blockly-minecraft,Tinkerforge/tvpl-blockly,Immortalin/blockly,altereagle/blockly,RealTimeWeb/blockly,rachel-fenichel/blockly,LLK/scratch-blocks