The old calling convention for vtkParse still works, but the new
convention is as follows:

vtkWrapPython [options] input_file output_file\n"
options:
  --concrete      concrete class (default)
  --abstract      abstract class
  --vtkobject     vtkObjectBase-derived class (default)
  --special       non-vtkObjectBase class
  --hints <file>  hints file