Deriving a tvtk wrapped vtk class

Hello,

I would like to derive a tvtk class wrapped from vtk (say tvtk.Filter) in order to override a method, as I would do for a pure python class but this is not possible here.
It seems this would require using the tvtk.VTKPythonAlgorithmBase class in collaboration with tvtk.Filter, but how to do it in such a way that the derived class has the same API as tvtk.Filter?
I tried multiple inheritance but it failed.

Antoine.