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Fernando Perez wrote:
> I was getting a 'pygtk present but import failed' message, which I 
> couldn't understand. I modified setup.py to reraise the exception at 
> that point, and it turned out to be a RuntimeError('could not open 
> display') exception.
Yes, I noticed the same thing when I tried to build matplotlib through 
an SSH session which didn't have X forwarding enabled. I get the 
message "pygtk present but import failed
Using default library and include directories for Tcl and Tk because a 
Tk window failed to open. You may need to define DISPLAY for Tk to work 
so that setup can determine where your libraries are located." The code 
is in setupext.py starting at line 198:
 try:
 tk=Tkinter.Tk()
 except Tkinter.TclError:
 print "Using default library and include directories for Tcl and 
Tk because a"
 print "Tk window failed to open. You may need to define DISPLAY 
for Tk to work"
 print "so that setup can determine where your libraries are 
located."
The 'import gtk' at line 149 in setup.py also fails if DISPLAY is not set.

Stephen Walton wrote:
> Happy New Year, Fernando!
> 
> Gee, I can't believe I can answer one of your questions :-)
Well, I'm happy to give you a chance to help :)
> 
>>/usr/include/pygtk-2.0/pygobject.h:140: error: expected `,' or `...' 
>>before "typename"
>>/usr/include/pygtk-2.0/pygobject.h:147: error: expected `,' or `...' 
>>before "typename"
>>error: command 'gcc' failed with exit status 1
> 
> 
> It's a known typo in the referenced two lines in pygobject.h. Until a 
> patch is released, manually change "typename" to "_typename"; it's just 
> in the function prototype so the name doesn't matter.
Ah, many thanks! After fixing this, it all worked great, except for one 
confusing little accident I'll mention in case someone else has the same 
problem.
I was getting a 'pygtk present but import failed' message, which I couldn't 
understand. I modified setup.py to reraise the exception at that point, and 
it turned out to be a RuntimeError('could not open display') exception. Well, 
it happens that I do a lot of my sysadmin work using screen, so that I can 
reattach to a session from anywhere, or leave long-running compiles going. By 
default, screen blocks X11 (I need to learn how to fix this), so the gtk 
initialization was failing due to lack of access to my display, even though 
the library is all there. The fix was to run the bdist_rpm _outside_ of 
screen, but it might be worth changing the setup file so that this error does 
not crash the build. I'm not sure it should really be necessary to have a 
running X11 for the build, as long as all the necessary headers and libraries 
are present.
Anyway, thanks again (and also to Vineet) for the help. You saved me a lot of 
frustration.
Regards,
f

I just spent half a day on this. There should be an entry in the release
notes on this. 
I found a reference to the problem here:
http://www.daa.com.au/pipermail/pygtk/2004-October/008826.html
I downloaded the latest version of pygobject.h and everything worked agains.
Vinjvinj
-----Original Message-----
From: mat...@li...
[mailto:mat...@li...] On Behalf Of Fernando
Perez
Sent: Monday, January 03, 2005 8:33 PM
To: mat...@li...
Subject: [Matplotlib-users] Building on fedora3?
Hi all,
I wonder if anyone is using FedoraCore3. I'd been recently building 
matplotlib RPMs with my Fedora 2 destktop without any troubles (after
patching 
distutils to ignore a multiple RPMs assertion). I just upgraded my desktop
to 
Fedora 3, and now the build fails with:
root@planck[matplotlib-0.70]# python setup.py build
running build
running build_py
running build_ext
building 'matplotlib.backends._gtkagg' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -m32 -march=i386 
-mtune=pentium4 -D_GNU_SOURCE -fPIC -fPIC -I/usr/local/include
-I/usr/include 
-Isrc -Iagg22/include -I. -I/usr/local/include -I/usr/include 
-I/usr/local/include/freetype2 -I/usr/include/freetype2 -Isrc/freetype2 
-Iagg22/include/freetype2 -I./freetype2 -I/usr/local/include/freetype2 
-I/usr/include/freetype2 -I/usr/local/include -I/usr/include 
-I/usr/include/pygtk-2.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
-I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/X11R6/include 
-I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/freetype2 
-I/usr/include/freetype2/config -I/usr/include/glib-2.0 
-I/usr/lib/glib-2.0/include -I/usr/include/python2.3 -c src/_gtkagg.cpp -o 
build/temp.linux-i686-2.3/src/_gtkagg.o
In file included from /usr/include/python2.3/Python.h:8,
 from /usr/include/pygtk-2.0/pygobject.h:5,
 from src/_gtkagg.cpp:8:
/usr/include/python2.3/pyconfig.h:850:1: warning: "_POSIX_C_SOURCE"
redefined
In file included from /usr/include/string.h:26,
 from 
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../../include/c++/3.4.2/cstring:5
1,
 from src/_gtkagg.cpp:1:
/usr/include/features.h:150:1: warning: this is the location of the previous
definition
In file included from src/_gtkagg.cpp:8:
/usr/include/pygtk-2.0/pygobject.h:140: error: expected `,' or `...' before 
"typename"
/usr/include/pygtk-2.0/pygobject.h:147: error: expected `,' or `...' before 
"typename"
error: command 'gcc' failed with exit status 1
Does anyone have a hint of what may be going on here? I looked at the 
pygobject.h file, but nothing jumps to my eye as obviously wrong.
Any help would be much appreciated.
Cheers,
f
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Mat...@li...
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Happy New Year, Fernando!
Gee, I can't believe I can answer one of your questions :-)
> /usr/include/pygtk-2.0/pygobject.h:140: error: expected `,' or `...' 
> before "typename"
> /usr/include/pygtk-2.0/pygobject.h:147: error: expected `,' or `...' 
> before "typename"
> error: command 'gcc' failed with exit status 1
It's a known typo in the referenced two lines in pygobject.h. Until a 
patch is released, manually change "typename" to "_typename"; it's just 
in the function prototype so the name doesn't matter.
Best of all, on FC3, 'python setup.py bdist_rpm' works great and 
generates a distributable RPM provided one is mindful of the dependency 
on a statically linked, architecture-specific ATLAS library.
Steve Walton

Hi all,
I wonder if anyone is using FedoraCore3. I'd been recently building 
matplotlib RPMs with my Fedora 2 destktop without any troubles (after patching 
distutils to ignore a multiple RPMs assertion). I just upgraded my desktop to 
Fedora 3, and now the build fails with:
root@planck[matplotlib-0.70]# python setup.py build
running build
running build_py
running build_ext
building 'matplotlib.backends._gtkagg' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -m32 -march=i386 
-mtune=pentium4 -D_GNU_SOURCE -fPIC -fPIC -I/usr/local/include -I/usr/include 
-Isrc -Iagg22/include -I. -I/usr/local/include -I/usr/include 
-I/usr/local/include/freetype2 -I/usr/include/freetype2 -Isrc/freetype2 
-Iagg22/include/freetype2 -I./freetype2 -I/usr/local/include/freetype2 
-I/usr/include/freetype2 -I/usr/local/include -I/usr/include 
-I/usr/include/pygtk-2.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include 
-I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/X11R6/include 
-I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/freetype2 
-I/usr/include/freetype2/config -I/usr/include/glib-2.0 
-I/usr/lib/glib-2.0/include -I/usr/include/python2.3 -c src/_gtkagg.cpp -o 
build/temp.linux-i686-2.3/src/_gtkagg.o
In file included from /usr/include/python2.3/Python.h:8,
 from /usr/include/pygtk-2.0/pygobject.h:5,
 from src/_gtkagg.cpp:8:
/usr/include/python2.3/pyconfig.h:850:1: warning: "_POSIX_C_SOURCE" redefined
In file included from /usr/include/string.h:26,
 from 
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../../include/c++/3.4.2/cstring:51,
 from src/_gtkagg.cpp:1:
/usr/include/features.h:150:1: warning: this is the location of the previous 
definition
In file included from src/_gtkagg.cpp:8:
/usr/include/pygtk-2.0/pygobject.h:140: error: expected `,' or `...' before 
"typename"
/usr/include/pygtk-2.0/pygobject.h:147: error: expected `,' or `...' before 
"typename"
error: command 'gcc' failed with exit status 1
Does anyone have a hint of what may be going on here? I looked at the 
pygobject.h file, but nothing jumps to my eye as obviously wrong.
Any help would be much appreciated.
Cheers,
f

This seems to be related to the bug reported by Eric Emsellem. If I do 
an imshow of an image with aspect='preserve' and activate the 'zoom to 
rectangle' function, the zoomed portion of the image is offset from the 
portion I outline with the cursor.

Stephen Walton wrote:
> second would be a windowed, scrollable view into an image which is 
> larger than the physical display.
Actually, imshow seems almost to do this. I did
imshow(imdata,interpolation='nearest')
where imdata was a 1024 square image. Zooming and panning _seems_ to 
show the full resolution image with individual pixels visible at high 
zooms. Is this right?