RF: disable __init__ error for Python 3
RF: disable __init__ error for Python 3

JohnGriffiths/dipy,maurozucchelli/dipy,matthieudumont/dipy,StongeEtienne/dipy,maurozucchelli/dipy,villalonreina/dipy,mdesco/dipy,samuelstjean/dipy,demianw/dipy,maurozucchelli/dipy,mdesco/dipy,rfdougherty/dipy,Messaoud-Boudjada/dipy,beni55/dipy,samuelstjean/dipy,sinkpoint/dipy,villalonreina/dipy,jyeatman/dipy,FrancoisRheaultUS/dipy,matthieudumont/dipy,JohnGriffiths/dipy,beni55/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,nilgoyyou/dipy,samuelstjean/dipy,jyeatman/dipy,oesteban/dipy,rfdougherty/dipy,Messaoud-Boudjada/dipy,demianw/dipy,oesteban/dipy,StongeEtienne/dipy,sinkpoint/dipy