[vtk-developers] VTK, Python 3 and the six module - install error on six.pyc

[Marcus D. Hanwell]

Hi,

I have been looking into this in the context of Tomviz, which uses
Python 3, but was able to reproduce this in a vanilla VTK build tree.
If you use Python 3 everything installs fine, but if you turn on
Module_SixPython then I get the following install error:

-- Installing: /usr/local/vtk/lib/cmake/vtk-7.1/Modules/SixPython.cmake
-- Installing: /usr/local/vtk/lib/python3.5/site-packages/six.py
CMake Error at ThirdParty/SixPython/cmake_install.cmake:40 (file):
 file INSTALL cannot find "/home/marcus/build/vtk/Wrapping/Python/six.pyc".
Call Stack (most recent call first):
 cmake_install.cmake:104 (include)

A quick grep turned up nothing obvious, but it would seem that other
Python modules are correctly finding the pyc files in the __pycache__
directories, but not so with six. Any pointers on where this logic
might be, and why it might be breaking down for this very simple
module.

Thanks,

Marcus