Can't import pylab on Windows with C API
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Can't import pylab on Windows with C API
by Nick Hilton
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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 ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Matplotlib-users mailing list Matplotlib-users@... https://lists.sourceforge.net/lists/listinfo/matplotlib-users |
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Re: Can't import pylab on Windows with C API
by Michael Droettboom-3
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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 > > > > > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry(R) Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9 - 12, 2009. Register now! > http://p.sf.net/sfu/devconference > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@... > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Matplotlib-users mailing list Matplotlib-users@... https://lists.sourceforge.net/lists/listinfo/matplotlib-users |
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Re: Can't import pylab on Windows with C API
by Nick Hilton
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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 <mdroe@...> wrote: > From: Michael Droettboom <mdroe@...> > Subject: Re: [Matplotlib-users] Can't import pylab on Windows with C API > To: "Nick Hilton" <weegreenblobbie@...> > Cc: matplotlib-users@... > 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 > > > > > > > > > > > > > ------------------------------------------------------------------------------ > > Come build with us! The BlackBerry(R) Developer > Conference in SF, CA > > is the only developer event you need to attend this > year. Jumpstart your > > developing skills, take BlackBerry mobile applications > to market and stay > > ahead of the curve. Join us from November 9 - 12, > 2009. Register now! > > http://p.sf.net/sfu/devconference > > _______________________________________________ > > Matplotlib-users mailing list > > Matplotlib-users@... > > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > > > -- > Michael Droettboom > Science Software Branch > Operations and Engineering Division > Space Telescope Science Institute > Operated by AURA for NASA > > ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Matplotlib-users mailing list Matplotlib-users@... https://lists.sourceforge.net/lists/listinfo/matplotlib-users |
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