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

[Nick H. <wee...@ya...>]

I have confirmed that this error does not occur with Matplotlib-0.99.0 and Python 2.6.

It does occur when I remove 0.99.0 and install 0.99.1.


--- On Mon, 10/26/09, Michael Droettboom <md...@st...> wrote:

> From: Michael Droettboom <md...@st...>
> Subject: Re: [Matplotlib-users] Can't import pylab on Windows with C API
> To: "Nick Hilton" <wee...@ya...>
> Cc: mat...@li...
> Date: Monday, October 26, 2009, 5:54 AM
> 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
> 
>