More PEP 8 in the same file
More PEP 8 in the same file

villalonreina/dipy,matthieudumont/dipy,JohnGriffiths/dipy,matthieudumont/dipy,villalonreina/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,JohnGriffiths/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,StongeEtienne/dipy,StongeEtienne/dipy