Update opc.py
Update opc.py

struct import missing
adam-back/fadecandy,lincomatic/fadecandy,poe/fadecandy,jsestrich/fadecandy,PimentNoir/fadecandy,piers7/fadecandy,poe/fadecandy,PimentNoir/fadecandy,Jorgen-VikingGod/fadecandy,PimentNoir/fadecandy,scanlime/fadecandy,adam-back/fadecandy,fragmede/fadecandy,poe/fadecandy,jsestrich/fadecandy,nomis52/fadecandy,nomis52/fadecandy,poe/fadecandy,nomis52/fadecandy,Protoneer/fadecandy,adam-back/fadecandy,pixelmatix/fadecandy,hakan42/fadecandy,Protoneer/fadecandy,scanlime/fadecandy,nomis52/fadecandy,piers7/fadecandy,jsestrich/fadecandy,fragmede/fadecandy,pixelmatix/fadecandy,Jorgen-VikingGod/fadecandy,lincomatic/fadecandy,fragmede/fadecandy,PimentNoir/fadecandy,hakan42/fadecandy,fragmede/fadecandy,scanlime/fadecandy,jsestrich/fadecandy,piers7/fadecandy,fragmede/fadecandy,adam-back/fadecandy,lincomatic/fadecandy,PimentNoir/fadecandy,piers7/fadecandy,Protoneer/fadecandy,nomis52/fadecandy,nomis52/fadecandy,scanlime/fadecandy,nomis52/fadecandy,piers7/fadecandy,poe/fadecandy,Jorgen-VikingGod/fadecandy,Protoneer/fadecandy,poe/fadecandy,Protoneer/fadecandy,hakan42/fadecandy,fragmede/fadecandy,lincomatic/fadecandy,scanlime/fadecandy,lincomatic/fadecandy,pixelmatix/fadecandy,lincomatic/fadecandy,lincomatic/fadecandy,poe/fadecandy,lincomatic/fadecandy,nomis52/fadecandy,pixelmatix/fadecandy,poe/fadecandy,fragmede/fadecandy,Jorgen-VikingGod/fadecandy,hakan42/fadecandy,scanlime/fadecandy,Jorgen-VikingGod/fadecandy,hakan42/fadecandy,pixelmatix/fadecandy,PimentNoir/fadecandy,adam-back/fadecandy,jsestrich/fadecandy,fragmede/fadecandy