Thread: [Matplotlib-users] Re: could not load matplotlib icon

On Tue, 2004-11-09 at 12:24,
mat...@li... wrote:
> Hi,
> 
> I keep getting this error when my matplotlib gtk app starts up:
> 
> Could not load matplotlib icon: Couldn't recognize the image file 
> format 
> for file 'C:\Python23\share\matplotlib\matplotlib.svg'
> 
> I don't *think* it's my fault. It doesn't seem to do any harm but it's
> untidy all the same.
> 
> Any suggestions?
> 
> Cheers,
> Matthew.

It looks like the problem is happening because your version of GTK does
include a GDK pixbuf loader for SVG files.

You can disable the message by editing the installed backend_gtk.py
(or editing the source file
matplotlib\lib\matplotlib\backends\backend_gtk.py
and reinstalling)
and changing
"verbose.report_error('Could not load matplotlib icon: %s' %
sys.exc_info()[1])"
to 
"verbose.report('Could not load matplotlib icon: %s' %
sys.exc_info()[1])"
or just "pass".

The fix has also been applied to CVS.

Steve

  Steve> I changed the code in cvs to
        import pygtk
        if not hasattr(sys, 'frozen'):
           pygtk.require('2.0')

  Steve> I think that should fix it.

Perhaps it would be better to define a constant in
matplotlib.__init__.py, something like

matplotlib.PY2EXE = hasattr(sys, 'frozen')

because then the code which is conditional upon py2exe would be more
readable

        if not matplotlib.PY2EXE
           pygtk.require('2.0')

or something like that...

JDH

John Hunter wrote:
> Perhaps it would be better to define a constant in
> matplotlib.__init__.py, something like
> 
> matplotlib.PY2EXE = hasattr(sys, 'frozen')
> 
> because then the code which is conditional upon py2exe would be more
> readable
> 
>         if not matplotlib.PY2EXE
>            pygtk.require('2.0')
> 
> or something like that...

Except that Py2EXE is not the only method of "freezing" apps. In 
particular, you'd want this to work with OS-X's Py2App, and probably 
other methods of bundling apps.

you might want:

matplotlib.FROZEN = hasattr(sys, 'frozen')

and

if not matplotlib.FROZEN
    pygtk.require('2.0')

Then you could also accommodate other keywords that other bundling 
methods use.

BTW, is someone really successfully using PyGTK on Windows? Cool!

-Chris



-- 
Christopher Barker, Ph.D.
Oceanographer
                                     		
NOAA/OR&R/HAZMAT         (206) 526-6959   voice
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Chr...@no...

>>>>> "Chris" == Chris Barker <Chr...@no...> writes:

    Chris> BTW, is someone really successfully using PyGTK on Windows?
    Chris> Cool!

I've deployed pretty complex pygtk apps on windows, that incorporate
matplotlib and VTK.  Works great - my windows user have never
complained.

Of course I had to write the vtk gtkglext render window myself....

Really, though, I've been extremely happy with gtk on windows - more
so than on OSX, actually.

JDH

Hi John,

I just installed 0.64 apparently successfully. However, none
of the examples run because POLAR cannot be imported.
I always get something like this:

[ads@ADS1 examples]$ python logo.py
Traceback (most recent call last):
  File "logo.py", line 3, in ?
    from matplotlib.matlab import *
  File "/usr/local/lib/python2.3/site-packages/matplotlib/matlab.py",
line 162,
in ?
    from axes import Axes, PolarAxes
  File "/usr/local/lib/python2.3/site-packages/matplotlib/axes.py", line
9, in ?    from artist import Artist
  File "/usr/local/lib/python2.3/site-packages/matplotlib/artist.py",
line 4, in ?
    from transforms import identity_transform
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/transforms.py", line
189, in ?
    from _transforms import IDENTITY, LOG10, POLAR, Func, FuncXY
ImportError: cannot import name POLAR

I'm on Redhat linux 9 and have installed every version
of matplotlib since 0.50.

What gives?

Thanks.

	-Al

>>>>> "Al" == Al Schapira <a.d...@wo...> writes:

    Al> Hi John, I just installed 0.64 apparently
    Al> successfully. However, none of the examples run because POLAR
    Al> cannot be imported.  I always get something like this:

    Al> [ads@ADS1 examples]$ python logo.py Traceback (most recent
    Al> call last): File "logo.py", line 3, in ?  from
    Al> matplotlib.matlab import * File
    Al> "/usr/local/lib/python2.3/site-packages/matplotlib/matlab.py",
    Al> line 162, in ?  from axes import Axes, PolarAxes File
    Al> "/usr/local/lib/python2.3/site-packages/matplotlib/axes.py",
    Al> line 9, in ?  from artist import Artist File
    Al> "/usr/local/lib/python2.3/site-packages/matplotlib/artist.py",
    Al> line 4, in ?  from transforms import identity_transform File
    Al> "/usr/local/lib/python2.3/site-packages/matplotlib/transforms.py",
    Al> line 189, in ?  from _transforms import IDENTITY, LOG10,
    Al> POLAR, Func, FuncXY ImportError: cannot import name POLAR

Please see my previous post with subject 

"if you have troubles installing"

On Wed, 2004-11-10 at 12:16,
mat...@li... wrote:
> John Hunter wrote:
> > Perhaps it would be better to define a constant in
> > matplotlib.__init__.py, something like
> > 
> > matplotlib.PY2EXE = hasattr(sys, 'frozen')
> > 
> > because then the code which is conditional upon py2exe would be more
> > readable
> > 
> >         if not matplotlib.PY2EXE
> >            pygtk.require('2.0')
> > 
> > or something like that...
> 
> Except that Py2EXE is not the only method of "freezing" apps. In 
> particular, you'd want this to work with OS-X's Py2App, and probably 
> other methods of bundling apps.
> 
> you might want:
> 
> matplotlib.FROZEN = hasattr(sys, 'frozen')
> 
> and
> 
> if not matplotlib.FROZEN
>     pygtk.require('2.0')
> 
> Then you could also accommodate other keywords that other bundling 
> methods use.
> 
> BTW, is someone really successfully using PyGTK on Windows? Cool!
> 
> -Chris
I added matplotlib.FROZEN to matplotlib.__init__.py.
It did not work because matplotlib has not yet been imported when 
pygtk.require() is called. So I changed the import order and it seems to
be working on now.

Steve

On Tue, 2004-11-09 at 12:24, matthew arnison wrote:
> 2. I was getting errors that the 
> matplotlib.backends.backend_mod.IMAGE_FORMAT attribute was not
> found, during toolbar initialization. I put in a workaround.

Is this happening when using the classes directly rather than using the
matlab interface? Are you doing something similar to the example
"embedding_in_gtk2.py" - that works OK for me.
Could you provide a minimal example to demonstrate this.

Steve

Well it works now.

For other reasons I downgraded to 0.63 and upgraded again to 0.64. As part
of this I found I had to manually wipe not only
Python23/Lib/site-packagaes/matplotlib but also Python23/share/matplotlib
to avoid errors (e.g. an ImportError: cannot import artist from Artist).

But now I don't need that workaround to avoid the IMAGE_FORMAT error.
examples/embedding_in_gtk2.py works fine too, after patching in the

toolbar = NavigationToolbar(canvas, win)

API change.

I'm sorry for the confusion.

Cheers,
Matthew.

On Wed, 10 Nov 2004, Steve Chaplin wrote:

> On Tue, 2004-11-09 at 12:24, matthew arnison wrote:
> > 2. I was getting errors that the
> > matplotlib.backends.backend_mod.IMAGE_FORMAT attribute was not
> > found, during toolbar initialization. I put in a workaround.
>
> Is this happening when using the classes directly rather than using the
> matlab interface? Are you doing something similar to the example
> "embedding_in_gtk2.py" - that works OK for me.
> Could you provide a minimal example to demonstrate this.
>
> Steve

Thanks heaps. That made things quiet once more.

While I was in there I noticed the stanza at the top which includes:

import pygtk
pygtk.require('2.0')

Can I suggest wrapping this with a check for py2exe? Like so:

if not hasattr(sys, 'frozen'):
     import pygtk
     pygtk.require('2.0')

This is because pygtk.require does not work with py2exe.

I guess this really a bug in pygtk. But since it is a show stopper at 
deployment time (as I discovered), I suggest it is important enough to 
provide this work around in matplotlib.

Cheers,
Matthew.

Steve Chaplin wrote:
> On Tue, 2004-11-09 at 12:24,
> mat...@li... wrote:
> 
>>Hi,
>>
>>I keep getting this error when my matplotlib gtk app starts up:
>>
>>Could not load matplotlib icon: Couldn't recognize the image file 
>>format 
>>for file 'C:\Python23\share\matplotlib\matplotlib.svg'
>>
>>I don't *think* it's my fault. It doesn't seem to do any harm but it's
>>untidy all the same.
>>
>>Any suggestions?
>>
>>Cheers,
>>Matthew.
> 
> 
> It looks like the problem is happening because your version of GTK does
> include a GDK pixbuf loader for SVG files.
> 
> You can disable the message by editing the installed backend_gtk.py
> (or editing the source file
> matplotlib\lib\matplotlib\backends\backend_gtk.py
> and reinstalling)
> and changing
> "verbose.report_error('Could not load matplotlib icon: %s' %
> sys.exc_info()[1])"
> to 
> "verbose.report('Could not load matplotlib icon: %s' %
> sys.exc_info()[1])"
> or just "pass".
> 
> The fix has also been applied to CVS.
> 
> Steve
> 

On Tue, 2004-11-09 at 20:14, matthew arnison wrote:
> Thanks heaps. That made things quiet once more.
> 
> While I was in there I noticed the stanza at the top which includes:
> 
> import pygtk
> pygtk.require('2.0')
> 
> Can I suggest wrapping this with a check for py2exe? Like so:
> 
> if not hasattr(sys, 'frozen'):
>      import pygtk
>      pygtk.require('2.0')
> 
> This is because pygtk.require does not work with py2exe.
I changed the code in cvs to
import pygtk
if not hasattr(sys, 'frozen'):
    pygtk.require('2.0')

I think that should fix it.

Steve