matplotlib-users Mailing List for matplotlib

>>>>> "LUK" == LUK ShunTim <shu...@po...> writes:


    LUK> I followed the link in the matplotlib site and installed gtk
    LUK> 2.2.4.1 from the sf site and the problem goes away. This
    LUK> version has all the images libraries with them. I must
    LUK> bookmark it!

Good news ...

    LUK> Another question: I've set the environmental variable AFMPATH
    LUK> in the registry via the control panel but matplotlib
    LUK> complains that the .afm files are not there.

I cannot replicate this problem on my system.  Are the *.afm files in
E:\Py23e\share\matplotlib?  Are you sure you are running the right
version of python, ie, do you still get the error with

  > E:\Py23e\python simple_plot.ps -dPS

You might want to add a diagnostic debug line to
backends/backend_ps.py to print the paths that it is searching.  After
line 422 in that file, insert a new line that prints the paths, eg,


    def _get_afm_filenames(self):
        paths = [os.path.join(distutils.sysconfig.PREFIX, 'share', 'matplotlib')]
        if os.environ.has_key('AFMPATH'):
            afmpath = os.environ['AFMPATH']
            if afmpath.find(';')>0: #win32 style
                paths.extend(afmpath.split(';'))
            elif afmpath.find(':')>0: # unix style
                paths.extend(afmpath.split(':'))
            else:
                paths.append(afmpath)
***     print paths
        fnames = []

And let me know what it reports.  If you are using the fonts that ship
with matplotlib, you shouldn't even need to set the AFMPATH because it
automatically looks in the share/matplotlib subdir of your python
install dir.  

You may also want to verify that matplotlib is finding your
environment variable by doing

> python
>>> import os
>>> print os.environ.has_key('AFMPATH')

If the *.afm fonts are in the share/matplotlib dir, and you are using
the right python, and the paths look correct from the diagnostic
information above, the only thing I can think of is that these files
are not readable by you (admin versus user thing?). To test this try

> python
>>> fh = file('E:\Py23e\\share\\matplotlib\\phvl8a.afm', 'r')
>>> s = fh.read()
>>> len(s)

Let me know....
JDH

John Hunter wrote:

>>>>>>"LUK" == LUK ShunTim <shu...@po...> writes:
> 
> 
>     LUK> Hello, When I tried out "python simple_plot.py" and tried to
>     LUK> save it as a png file, python crashes. No problem with saving
>     LUK> it to jpeg, though.
> 
> I haven't seen that before.  It works fine on my system (Windows ME)
> and noone else has reported a win32 problem.  The fact that it works
> with jpeg and not png suggests a lib PNG problem.  What version of
> pygtk and GTK-Runtime are you using.  If you are using pygtk-2.0.0 and
> GTK-Runtime-2.2.4.1, then you should be OK.  Have you installed an
> earlier version of these libs, possibly creating a library conflict?
> 
> When you search for libpng, what turns up?
>
> JDH
> 

GTK 2.2.4 (Can't remember where I got it. There's been a few of these 
floating around.) Pygtk 2.0.0 from the link in matplotlib site.

Somehow my GTK runtime don't have the png, jpeg etc images libraries and 
I got them from the gnuwin32 sf site.

I followed the link in the matplotlib site and installed gtk 2.2.4.1 
from the sf site and the problem goes away. This version has all the 
images libraries with them. I must bookmark it!

Another question: I've set the environmental variable AFMPATH in the 
registry via the control panel but matplotlib complains that the .afm 
files are not there.

<quote>
H:\00work\00cvs\matplotlib\matplotlib\examples>python simple_plot.py -dPS
Error: Could not find any AFM files; please set AFMPATH to point to some 
readable adobe font metric files

H:\00work\00cvs\matplotlib\matplotlib\examples>echo %AFMPATH%
E:\Py23e\share\matplotlib
</quote>

This is a W2K system.

Thanks very much,
ST
--

>>>>> "LUK" == LUK ShunTim <shu...@po...> writes:

    LUK> Hello, When I tried out "python simple_plot.py" and tried to
    LUK> save it as a png file, python crashes. No problem with saving
    LUK> it to jpeg, though.

I haven't seen that before.  It works fine on my system (Windows ME)
and noone else has reported a win32 problem.  The fact that it works
with jpeg and not png suggests a lib PNG problem.  What version of
pygtk and GTK-Runtime are you using.  If you are using pygtk-2.0.0 and
GTK-Runtime-2.2.4.1, then you should be OK.  Have you installed an
earlier version of these libs, possibly creating a library conflict?

When you search for libpng, what turns up?

JDH

Hello,

When I tried out "python simple_plot.py" and tried to save it as a png 
file, python crashes. No problem with saving it to jpeg, though.

My system: W2K SP4/Python2.3.2/matplotlib-0.31

Here's some traceback:

<quote>
python.exe caused an Access Violation at location 77f92373 in module 
ntdll.dll Writing to location 00000010.

Registers:
eax=00000000 ebx=00000000 ecx=00000000 edx=00000000 esi=7803a710 
edi=00000000
eip=77f92373 esp=0012e83c ebp=0012e89c iopl=0         nv up ei pl nz na 
pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000 
efl=00000202

Call stack:
77F92373  ntdll.dll:77F92373  RtlpWaitForCriticalSection
77F922F8  ntdll.dll:77F922F8  RtlImageDirectoryEntryToData
03B5C06C  libpng.dll:03B5C06C  png_set_read_fn
01F5F480
00FA5192  libgdk_pixbuf-2.0-0.dll:00FA5192  gdk_pixbuf_new_from_xpm_data
00FA53FF  libgdk_pixbuf-2.0-0.dll:00FA53FF  gdk_pixbuf_savev
00E822DA  _gtk.pyd:00E822DA  init_gtk
1E0591AA  python23.dll:1E0591AA  PyCFunction_Call
</quote>

Regards,
ST
--