Fix for Python2.6 syntax
Fix for Python2.6 syntax

debsankha/networkx,nathania/networkx,ghdk/networkx,ghdk/networkx,cmtm/networkx,jakevdp/networkx,chrisnatali/networkx,blublud/networkx,RMKD/networkx,beni55/networkx,dhimmel/networkx,blublud/networkx,jfinkels/networkx,harlowja/networkx,aureooms/networkx,kai5263499/networkx,tmilicic/networkx,sharifulgeo/networkx,jni/networkx,kernc/networkx,jni/networkx,yashu-seth/networkx,debsankha/networkx,bzero/networkx,chrisnatali/networkx,RMKD/networkx,kai5263499/networkx,ionanrozenfeld/networkx,harlowja/networkx,wasade/networkx,jakevdp/networkx,ltiao/networkx,andnovar/networkx,Sixshaman/networkx,jcurbelo/networkx,farhaanbukhsh/networkx,michaelpacer/networkx,JamesClough/networkx,bzero/networkx,dhimmel/networkx,farhaanbukhsh/networkx,RMKD/networkx,ionanrozenfeld/networkx,farhaanbukhsh/networkx,bzero/networkx,jtorrents/networkx,ionanrozenfeld/networkx,jni/networkx,dmoliveira/networkx,goulu/networkx,nathania/networkx,kernc/networkx,SanketDG/networkx,nathania/networkx,debsankha/networkx,ghdk/networkx,jakevdp/networkx,jtorrents/networkx,dmoliveira/networkx,aureooms/networkx,OrkoHunter/networkx,NvanAdrichem/networkx,kai5263499/networkx,aureooms/networkx,sharifulgeo/networkx,harlowja/networkx,dmoliveira/networkx,dhimmel/networkx,kernc/networkx,blublud/networkx,sharifulgeo/networkx,chrisnatali/networkx