refactor on valid_guid (love those ones), PEP8 tidying up
refactor on valid_guid (love those ones), PEP8 tidying up

mirrax/OpenBazaar,STRML/OpenBazaar,saltduck/OpenBazaar,must-/OpenBazaar,hoffmabc/OpenBazaar,yagoulas/OpenBazaar,dlcorporation/openbazaar,hoffmabc/OpenBazaar,atsuyim/OpenBazaar,tortxof/OpenBazaar,habibmasuro/OpenBazaar,bglassy/OpenBazaar,dionyziz/OpenBazaar,kordless/OpenBazaar,kordless/OpenBazaar,bankonme/OpenBazaar,blakejakopovic/OpenBazaar,STRML/OpenBazaar,hoffmabc/OpenBazaar,kordless/OpenBazaar,yagoulas/OpenBazaar,Renelvon/OpenBazaar,mirrax/OpenBazaar,STRML/OpenBazaar,atsuyim/OpenBazaar,dionyziz/OpenBazaar,yagoulas/OpenBazaar,must-/OpenBazaar,akhavr/OpenBazaar,atsuyim/OpenBazaar,bankonme/OpenBazaar,dlcorporation/openbazaar,must-/OpenBazaar,matiasbastos/OpenBazaar,dlcorporation/openbazaar,im0rtel/OpenBazaar,mirrax/OpenBazaar,im0rtel/OpenBazaar,saltduck/OpenBazaar,STRML/OpenBazaar,blakejakopovic/OpenBazaar,matiasbastos/OpenBazaar,bglassy/OpenBazaar,bglassy/OpenBazaar,freebazaar/FreeBazaar,freebazaar/FreeBazaar,yagoulas/OpenBazaar,dlcorporation/openbazaar,tortxof/OpenBazaar,freebazaar/FreeBazaar,saltduck/OpenBazaar,NolanZhao/OpenBazaar,rllola/OpenBazaar,dlcorporation/openbazaar,Renelvon/OpenBazaar,tortxof/OpenBazaar,akhavr/OpenBazaar,blakejakopovic/OpenBazaar,matiasbastos/OpenBazaar,NolanZhao/OpenBazaar,NolanZhao/OpenBazaar,NolanZhao/OpenBazaar,blakejakopovic/OpenBazaar,bankonme/OpenBazaar,bglassy/OpenBazaar,rllola/OpenBazaar,habibmasuro/OpenBazaar,habibmasuro/OpenBazaar,rllola/OpenBazaar,kordless/OpenBazaar,dionyziz/OpenBazaar,mirrax/OpenBazaar,rllola/OpenBazaar,dlcorporation/openbazaar,bankonme/OpenBazaar,dionyziz/OpenBazaar,hoffmabc/OpenBazaar,freebazaar/FreeBazaar,hoffmabc/OpenBazaar,atsuyim/OpenBazaar,akhavr/OpenBazaar,im0rtel/OpenBazaar,matiasbastos/OpenBazaar,akhavr/OpenBazaar,Renelvon/OpenBazaar,must-/OpenBazaar,akhavr/OpenBazaar,dionyziz/OpenBazaar,im0rtel/OpenBazaar,tortxof/OpenBazaar,hoffmabc/OpenBazaar,saltduck/OpenBazaar,freebazaar/FreeBazaar,habibmasuro/OpenBazaar,Renelvon/OpenBazaar