use setdefault all around
use setdefault all around

MSeifert04/astropy,dhomeier/astropy,lpsinger/astropy,saimn/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,bsipocz/astropy,lpsinger/astropy,dhomeier/astropy,larrybradley/astropy,saimn/astropy,larrybradley/astropy,pllim/astropy,StuartLittlefair/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,saimn/astropy,DougBurke/astropy,MSeifert04/astropy,astropy/astropy,funbaker/astropy,bsipocz/astropy,StuartLittlefair/astropy,DougBurke/astropy,MSeifert04/astropy,mhvk/astropy,saimn/astropy,stargaser/astropy,MSeifert04/astropy,mhvk/astropy,stargaser/astropy,mhvk/astropy,mhvk/astropy,funbaker/astropy,pllim/astropy,DougBurke/astropy,lpsinger/astropy,lpsinger/astropy,larrybradley/astropy,StuartLittlefair/astropy,funbaker/astropy,larrybradley/astropy,astropy/astropy,pllim/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,funbaker/astropy,pllim/astropy,larrybradley/astropy,mhvk/astropy,astropy/astropy,stargaser/astropy,bsipocz/astropy,astropy/astropy,saimn/astropy,bsipocz/astropy,dhomeier/astropy,lpsinger/astropy,astropy/astropy,stargaser/astropy,DougBurke/astropy,pllim/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy