Fix py26 failure for #460
Fix py26 failure for #460

stratosgear/eve,mcreenan/eve,EasonYi/eve,julianhille/eve,amagdas/eve,matthieuprat/eve,sebest/eve,bcrochet/eve,pjs7678/eve,jzorrof/eve,yanyanqin/eve,opticode/eve,kidaa/eve,hustlzp/eve,mugurrus/eve,eduardomb/eve,elpoisterio/eve,superdesk/eve,kalbasit/eve