### Description When pressing a key corresponding to unicode code 128-255 [1], the `wxVTKRenderWindowInteractor` raises the following error: ```python Traceback (most recent call last): File "<venv>\python\lib\site-packages\vtk\wx\wxVTKRenderWindowInteractor.py", line 593, in OnKeyUp self._Iren.SetEventInformationFlipY(event.GetX(), event.GetY(), TypeError: SetEventInformationFlipY argument 5: a string of length 1 is required ``` [1] For example Umlaut characters `ä`,`ö`,`ü` ### Possible cause & resolution I believe this is because, when converted to `utf-8` via ```python key = 'ä' # offending key example key.encode('utf-8') ``` the resulting byte string has length 2, not 1. One possible resolution would be changing `256` to `128` in https://gitlab.kitware.com/vtk/vtk/-/blob/657c719a343fa25f73e7d31addb7db316bb5f9d7/Wrapping/Python/vtkmodules/wx/wxVTKRenderWindowInteractor.py#L563 and similar occurrences. ### Other information Platform found on: - OS: Windows - wxPython version: 4.2.0