fix brackets in (original) list(zip(*g)[0]) 
fix brackets in (original) list(zip(*g)[0]) 

It has been pointed out already, but it is not fixed! See issue https://github.com/claesenm/optunity/issues/94
claesenm/optunity,claesenm/optunity,claesenm/optunity,claesenm/optunity