Print useful help (instead of hard-to-understand traceback) when user didn't activate her ROOT installation before installing rootpy.
Print useful help (instead of hard-to-understand traceback) when user didn't activate her ROOT installation before installing rootpy.
kreczko/rootpy,ndawe/rootpy,ndawe/rootpy,rootpy/rootpy,rootpy/rootpy,kreczko/rootpy,ndawe/rootpy,rootpy/rootpy,kreczko/rootpy