Re: [Matplotlib-users] Can't import pylab on Windows with C API

[Michael D. <md...@st...>]

I'm not aware of anyone trying this, but I suspect it's related to 
differences in how DLL paths are searched on Windows vs. shared objects 
on Linux.

This sort of seems like a lower-level Python issue -- I wonder if you 
could find other projects that do this and see where matplotlib 
differs.  For instance, can you import numpy this way?  If not, I would 
bring this up on the Python users list and see if they have any advice.

Mike

Nick Hilton wrote:
> Hello all,
>
> I am trying to plot things from C using pylab.  The configuration:
>
> Window XP 32 bits
> Python-2.6.3
> numpy-1.3.0
> matplotlib-0.99.1.
>
> I can easily do this on Linux, but the same code does not work on Windows.  Here is a test program that tries to import pylab:
>
> #include <stdio.h>
>
> #include <Python.h>
>
>
>
> int main(void)
>
> {
>
>     PyObject * module = NULL;
>
>
>
>     Py_Initialize();
>
>
>
>     module = PyImport_ImportModule("matplotlib.pylab");
>
>
>
>     if(module == NULL || module == Py_None)
>
>     {
>
>         printf("no\n");
>
>         PyErr_Print();
>
>         PyErr_Clear();
>
>     }
>
>     else
>
>     {
>
>         printf("yes\n");
>
>     }
>
>
>
>     Py_Finalize();
>
>
>
>     return 0;
>
> }
>
> The code above works fine with Python2.6 and Linux.  However, on Windows it fails; here is the output:
>
> no
>
> Traceback (most recent call last):
>
>   File "C:\Python26\lib\site-packages\matplotlib\pylab.py", line 206, in <module>
>
>     from matplotlib import mpl  # pulls in most modules
>
>   File "C:\Python26\lib\site-packages\matplotlib\mpl.py", line 1, in <module>
>
>     from matplotlib import artist
>
>   File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 5, in <module>
>
>     from transforms import Bbox, IdentityTransform, TransformedBbox, TransformedPath
>
>   File "C:\Python26\lib\site-packages\matplotlib\transforms.py", line 34, in <module>
>
>     from matplotlib._path import affine_transform
>
> ImportError: DLL load failed: The specified module could not be found.
>
> Has anybody tried this?
>
> Thanks!
> Nick
>
>
>
>       
>
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA