Matplotlib 0.99.3 win32 py2.6 crashes on import

I just installed matplotlib-0.99.3.win32-py2.6.exe
on this Win2000 PC. When I try:

from matplotlib import pyplot as plt

it crashes Python with an apparent NULL-pointer reference. If I run

python -v

then it crashes just after:

c:\python26\lib\site-packages\matplotlib\transforms.pyc matches

c:\python26\li

b\site-packages\matplotlib\transforms.py

import matplotlib.transforms # precompiled from
c:\python26\lib\site-packages\ma

tplotlib\transforms.pyc

matplotlib-0.99.1.win32-py2.6.exe worked
fine on this PC.

Regards,

Craig McQueen

I can not reproduce the crash in a Virtual Machine with Windows 2000 SP4, Python 2.6.5, numpy 1.4.1, and matplotlib 0.99.3.

Exactly which versions are you using, and how did you install Python (for all users?). What is your CPU?

matplotlib-0.99.3.win32-py2.6 was built against numpy 1.4.1, libpng 1.4.2 and zlib 1.2.5, while matplotlib-0.99.1.win32-py2.6 was built against numpy 1.3.0, libpng 1.2.3x, and zlib 1.2.3.

Christoph

···

On 5/31/2010 1:53 AM, Craig McQueen wrote:

  I just installed matplotlib-0.99.3.win32-py2.6.exe on this Win2000 PC.
When I try:
     from matplotlib import pyplot as plt

it crashes Python with an apparent NULL-pointer reference. If I run
     python -v

then it crashes just after:
# c:\python26\lib\site-packages\matplotlib\transforms.pyc matches
c:\python26\li
b\site-packages\matplotlib\transforms.py
import matplotlib.transforms # precompiled from
c:\python26\lib\site-packages\ma
tplotlib\transforms.pyc

matplotlib-0.99.1.win32-py2.6.exe worked fine on this PC.

Regards,
Craig McQueen

Christoph Gohlke wrote:

  I just installed matplotlib-0.99.3.win32-py2.6.exe on this Win2000 PC.
When I try:
     from matplotlib import pyplot as plt

it crashes Python with an apparent NULL-pointer reference. If I run
     python -v

then it crashes just after:
# c:\python26\lib\site-packages\matplotlib\transforms.pyc matches
c:\python26\li
b\site-packages\matplotlib\transforms.py
import matplotlib.transforms # precompiled from
c:\python26\lib\site-packages\ma
tplotlib\transforms.pyc

matplotlib-0.99.1.win32-py2.6.exe worked fine on this PC.

Regards,
Craig McQueen

I can not reproduce the crash in a Virtual Machine with Windows 2000 SP4, Python 2.6.5, numpy 1.4.1, and matplotlib 0.99.3.

Exactly which versions are you using, and how did you install Python (for all users?). What is your CPU?

matplotlib-0.99.3.win32-py2.6 was built against numpy 1.4.1, libpng 1.4.2 and zlib 1.2.5, while matplotlib-0.99.1.win32-py2.6 was built against numpy 1.3.0, libpng 1.2.3x, and zlib 1.2.3.

Christoph

Ah--installing numpy 1.4.1 fixed the issue. I had numpy 1.3.0 installed before that.

Thanks for such a helpful response. I wasn't aware that matplotlib is "built against" a particular version of numpy (not quite sure what that means either, unless numpy provides a direct C API as well as the Python API; please excuse my ignorance).

(To answer your questions in case that's still useful somehow... I'm using Windows 2000 SP4, Python 2.6.5, on a Pentium 4 PC. I installed Python for all users.)

Thanks and regards,
Craig McQueen

···

On 5/31/2010 1:53 AM, Craig McQueen wrote:

Yes, numpy has a C API, which is used by MPL.

I can confirm the crashes with numpy 1.3.

John: I rebuilt the 32 bit binaries for Python 2.5 and 2.6 against numpy 1.3.0. They do also work with numpy 1.4.1. Please consider uploading these binaries to the SF site. I also noticced that the eggs on the SF download site are corrupted, showing only 1.6 KB. The updated files are at <http://www.lfd.uci.edu/~gohlke/pythonlibs/#matplotlib>. Thanks.

···

On 5/31/2010 4:53 PM, Craig McQueen wrote:

Christoph Gohlke wrote:

On 5/31/2010 1:53 AM, Craig McQueen wrote:

I just installed matplotlib-0.99.3.win32-py2.6.exe on this Win2000 PC.
When I try:
from matplotlib import pyplot as plt

it crashes Python with an apparent NULL-pointer reference. If I run
python -v

then it crashes just after:
# c:\python26\lib\site-packages\matplotlib\transforms.pyc matches
c:\python26\li
b\site-packages\matplotlib\transforms.py
import matplotlib.transforms # precompiled from
c:\python26\lib\site-packages\ma
tplotlib\transforms.pyc

matplotlib-0.99.1.win32-py2.6.exe worked fine on this PC.

Regards,
Craig McQueen

I can not reproduce the crash in a Virtual Machine with Windows 2000
SP4, Python 2.6.5, numpy 1.4.1, and matplotlib 0.99.3.

Exactly which versions are you using, and how did you install Python
(for all users?). What is your CPU?

matplotlib-0.99.3.win32-py2.6 was built against numpy 1.4.1, libpng
1.4.2 and zlib 1.2.5, while matplotlib-0.99.1.win32-py2.6 was built
against numpy 1.3.0, libpng 1.2.3x, and zlib 1.2.3.

Christoph

Ah--installing numpy 1.4.1 fixed the issue. I had numpy 1.3.0 installed
before that.

Thanks for such a helpful response. I wasn't aware that matplotlib is
"built against" a particular version of numpy (not quite sure what that
means either, unless numpy provides a direct C API as well as the Python
API; please excuse my ignorance).

(To answer your questions in case that's still useful somehow... I'm
using Windows 2000 SP4, Python 2.6.5, on a Pentium 4 PC. I installed
Python for all users.)

Thanks and regards,
Craig McQueen

--
Christoph

Hey Christoph -- I just updated the win32 binaries again. Thanks for
the rebuild. The sf upload page is extremely fragile and flaky, so
I'm not surprised a corrupted binary got uploaded. I made sure the
uploads completed this time -- hopefully they are now good but take a
look.

JDH

···

On Mon, May 31, 2010 at 7:56 PM, Christoph Gohlke <cgohlke@...2143...> wrote:

John: I rebuilt the 32 bit binaries for Python 2.5 and 2.6 against numpy
1.3.0. They do also work with numpy 1.4.1. Please consider uploading these
binaries to the SF site. I also noticced that the eggs on the SF download
site are corrupted, showing only 1.6 KB. The updated files are at
<http://www.lfd.uci.edu/~gohlke/pythonlibs/#matplotlib>. Thanks.

looks good to me.

···

On 5/31/2010 7:45 PM, John Hunter wrote:

On Mon, May 31, 2010 at 7:56 PM, Christoph Gohlke<cgohlke@...2143...> wrote:

John: I rebuilt the 32 bit binaries for Python 2.5 and 2.6 against numpy
1.3.0. They do also work with numpy 1.4.1. Please consider uploading these
binaries to the SF site. I also noticced that the eggs on the SF download
site are corrupted, showing only 1.6 KB. The updated files are at
<http://www.lfd.uci.edu/~gohlke/pythonlibs/#matplotlib>. Thanks.

Hey Christoph -- I just updated the win32 binaries again. Thanks for
the rebuild. The sf upload page is extremely fragile and flaky, so
I'm not surprised a corrupted binary got uploaded. I made sure the
uploads completed this time -- hopefully they are now good but take a
look.