Hi Mike, thanks for responding.
I spent most of last night with this, re-installing Python using SuSE's
package manager, re-installing matplotlib the same way. No joy. I
tried downloading the matplotlib source and found that when I attempted
to install, setup.py claimed I didn't have gtk available as a Python
import. Checking this, I found it to be true although the installation
directories are present. Re-installing gtk and things that depended on
it had no effect - it still wont import.
Checking another machine, I found it worked ok with gtk, pylab and
anything else I could test. The file versions and directory structures
were the same.
Following your UCS2 / UCS4 comments and a scroogle search, I found this:
http://copia.ogbuji.net/blog/2006-01-09/Confusion_
sys.maxunicode is set to 65535 on the non-working installation.
sys.unicode is set to 1114111 on the working installation! How did they
become different? How can I get them to match?
Following the link, a comment is made on
http://copia.ogbuji.net/blog/2005-08-04/alt_unicod about site.py.
import site
site.__file__ b # thanks for the tip Mike!
showed the working installation to point to
'/usr/lib/python2.5/site.pyc'
The non-working to
'/usr/local/lib/python2.5.site.pyc'
local? Maybe that's one of the leftovers from the source experiments I
was doing.
Checking sys.prefix on both installations shows the working machine to
be '/usr', the non working, '/usr/local'.
$ whereis python
Generates thirteen results on the working installation, one of which
refers to a /local/ type entry. The non-working installation shows
fifteen entries, five of which contain '/local/.
To be honest, I'm lost. I'd like to remove Python and re-install it,
with all the modules I'm now using. Removing it with SuSE's package
manager generates all sorts of problems with dependencies. Updating it
has no effect. Is there a way to convince the system to start afresh
(assuming that's the best approach), maybe removing the local settings?
Thanks for your patience.
Best regards,
Mark.
Michael Droettboom wrote:
···
I recently ran into a similar problem myself building stuff from source,
but I'm not sure of the specifics with SuSE and their packages etc.
Python can be configured in two ways -- with two-byte (UCS2) or
four-byte (UCS4) Unicode characters. Apparently the default for a
source installation of Python is UCS2, but many (most) Linux
distributions build it for UCS4. Python extensions built for one
configuration can not be used with a Python built for the other
configuration.
When Python extensions are built, if all goes well, they will match the
configuration of the Python interpreter. It looks like somehow you have
a mismatch between matplotlib and your Python interpreter.
If you installed everything from packages, I would expect them all to
match (unless SuSE's quality control has really gone down as of late
;). Perhaps something is still around from when you built things from
source. Did you at any point build your own Python?
On a number of Linux distributions (probably including SuSE, but I don't
know for sure), things installed from source are under the /usr/local
tree. To diagnose this, you could see if anything is getting pulled in
from there (rather than from the packaged stuff, which wouldn't be under
/usr/local). For instance "whereis python", will tell you which python
is being used. When you import a Python module, you can use __file__ to
see where it was imported from. For example:
import pylab
pylab.__file__
Hope that at least offers some next steps for tracking this down.
Cheers,
Mike
mark starnes wrote:
Hi everyone,
I'm running Suse10.2 and installing packages using Yast (after much pain
trying to install Numpy and Scipy without it!). After installing (and
re-installing) Matplotlib in this way, I get the error,
ImportError: matplotlib/ft2font.so: undefined symbol:
PyUnicodeUCS4_GetSize
when I attempt to import pylab.
Can anybody help me fix this? I couldn't find any help on the
matplotlib site and my .matplotlib directory is empty.
Oh, I'm also a bit new to Linux - please be patient!
Thanks in advance,
Mark.
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Then you should (most likely) only be dealing with stuff installed from SuSE packages. Uninstalling things built from source is usually not directly possible without using a tool like checkinstall.