Fix syntax for py 2.6
Fix syntax for py 2.6

bollu/vispy,sh4wn/vispy,Eric89GXL/vispy,dchilds7/Deysha-Star-Formation,dchilds7/Deysha-Star-Formation,Eric89GXL/vispy,jdreaver/vispy,srinathv/vispy,RebeccaWPerry/vispy,jay3sh/vispy,sh4wn/vispy,inclement/vispy,jdreaver/vispy,srinathv/vispy,jay3sh/vispy,julienr/vispy,drufat/vispy,RebeccaWPerry/vispy,kkuunnddaannkk/vispy,hronoses/vispy,drufat/vispy,sbtlaarzc/vispy,michaelaye/vispy,ghisvail/vispy,julienr/vispy,inclement/vispy,srinathv/vispy,sbtlaarzc/vispy,hronoses/vispy,RebeccaWPerry/vispy,inclement/vispy,QuLogic/vispy,kkuunnddaannkk/vispy,michaelaye/vispy,drufat/vispy,jay3sh/vispy,dchilds7/Deysha-Star-Formation,jdreaver/vispy,kkuunnddaannkk/vispy,ghisvail/vispy,michaelaye/vispy,bollu/vispy,bollu/vispy,hronoses/vispy,Eric89GXL/vispy,ghisvail/vispy,QuLogic/vispy,sbtlaarzc/vispy,sh4wn/vispy,julienr/vispy,QuLogic/vispy