Keep lint happy
Keep lint happy

(But what about py3?)

kuba/letsencrypt,jsha/letsencrypt,lmcro/letsencrypt,VladimirTyrin/letsencrypt,jtl999/certbot,VladimirTyrin/letsencrypt,bsmr-misc-forks/letsencrypt,wteiken/letsencrypt,mitnk/letsencrypt,dietsche/letsencrypt,twstrike/le_for_patching,bsmr-misc-forks/letsencrypt,brentdax/letsencrypt,thanatos/lets-encrypt-preview,letsencrypt/letsencrypt,TheBoegl/letsencrypt,stweil/letsencrypt,DavidGarciaCat/letsencrypt,brentdax/letsencrypt,dietsche/letsencrypt,TheBoegl/letsencrypt,DavidGarciaCat/letsencrypt,jtl999/certbot,stweil/letsencrypt,mitnk/letsencrypt,twstrike/le_for_patching,wteiken/letsencrypt,letsencrypt/letsencrypt,kuba/letsencrypt,lmcro/letsencrypt,jsha/letsencrypt,thanatos/lets-encrypt-preview