For those of you using import vtk you can easily start using the vtkmodules files. I have a script that looks through your code and provides you with a list of the necessary from ... import ... statements.
Please see VTKImportsForPython, and ignore the comment about sorting. It needs testing as I am not sure that I capture all of the VTK classes since pattern matching is used.
Also there is a script VTKModulesForCxx that will generate a find_package(VTK COMPONENTS ...) command for CMake, useful for Cxx development.
Both these scripts have some minor changes coming through (tomorrow?).