[vtkusers] vtk latest + vanilla python 2.2.2

[David Gobbi]

Hi Mike,

Are you using the cygwin shell?  It looks like you are trying
to use VTK with the copy of python that comes with cygwin.
That is the only thing I can think of that would give
os.name == 'posix' on a Windows system.

You should try running your VTK programs with the
C:/Python22/python.exe executable instead.

Cheers,
 - David

-- 
  David Gobbi, MSc                dgobbi at imaging.robarts.ca
  Advanced Imaging Research Group
  Robarts Research Institute, University of Western Ontario

On Thu, 13 Feb 2003, Prabhu Ramachandran wrote:

> >>>>> "MC" == Mike Carifio <carifio at usys.com> writes:
>
>     MC> Here's the error I'm getting:
>
>     >>>> import vtk
> [snip]
>     >>>>
>
>     MC> Obviously, python 2.2.2 can't find libvtkCommonPython. There
>     MC> is a vtkCommonPython.dll. When I import that, I get:
>
>     >>>> import vtkCommonPython
>     MC> Fatal Python error: Interpreter not initialized (version
>     MC> mismatch?)
>
>     MC> Am I supposed to be running a particular version of Python? Do
>     MC> I need to build Python from sources to make everything kosher?
>
>     MC> Finally, is this email list archived? I can't believe I'm the
>     MC> first person to be having this problem. Thanks.
>
> Well, several things.  We try to keep VTK-Python as up-to-date as
> possible.  I test it under Linux and usually ask for feedback on Win32
> since I dont run Windows.  So far we have not had this problem.
>
> Yes, this list is archived.
>
>   http://public.kitware.com/pipermail/vtkusers/
>
> Yes, you are the first person to run into this and yes this is a wierd
> bug.  What is happening is that your os.name is 'posix' even though
> the OS you are running is win32!?  Therefore when you import vtk it
> tries to import the libvtk*Python modules instead of vtkPython*.
> Could you please tell us the output of this:
>
>  python -c "import os; print os.name"
>
> If that prints 'posix' we need another way to determine your os.
> AFAIK Win32 should print either 'dos' or 'nt' and not posix.  Unless
> of course, you have installed python via cygwin.  This could also
> explain your version mismatch error.  If this is the case then you
> should not use the DLL's that you build from VS7.  Instead you need to
> build VTK from within cygwin.
>
> If OTOH, you have installed Python for win32 you simply need to make
> sure that you are using the same version of the Python interpreter
> that you built your python wrappers with.  So if you have multiple
> versions of Python installed on your system you need to make sure that
> you build VTK-Python with the Python headers corresponding to the
> Python interpreter that you plan to use to run vtk-python scripts.
> You dont have to build Python from source to get everything working.
>
> cheers,
> prabhu
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