[SofaPython] minor cleaning
[SofaPython] minor cleaning

(cherry picked from commit b5e97defdc5cb1f9d3f1a723076fb8db853f23f0)

FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa