Fixing Python 2.6 error.
Fixing Python 2.6 error.

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