Dear John & Darren, Thanks for your reply -- the "panic" I alluded for is simply the result of three months' strain working day-by-day to develop a very large application using wxPython/MPL/Basemap under Linux, along with a RAM crash and, more recently, an upgrade form Ubuntu 8.04 (Hardy Heron) to Ubuntu 8.10 (Intrepid Ibex -- I love the fondness the guys at Canonical have for zoology).
Well, that said, here are my reply to the questions and comments: 1) I am not using pyplot in an embedded environment. Indeed, MPL/Basemap is running very well embedded in my wxPython application, *without* pyplot of course. The reported error appears only when I try any test script using pyplot (these scripts are useful for testing ideas in an interpreted language as Python, before putting them to work in a GUI application). My application uses the wxagg backends, which are work well. 2) All scripts using pyplot ran quite well under Ubuntu Hardy; they are just presenting these issues after I upgraded to Intrepid (which, BTW, looks much more stable in my system than was Hardy -- except for this problem with MPL) 3) I am running MPL 0.98.5.1, installed with Ubuntu itself. I ran sudo easy_install matplotlib in an attempt to install version 0.98.5.2, but this gave no result (easy_Install tells me that I already have the latest version of MPL) Well, I have googled the error message: "ImportError: libffi.so.4: cannot open shared object file: No such file or directory" and it seems that a few other Python applications are crashing with this error under Ubuntu Intrepid (but I could not find any solution, just error reports). I am not sure if compiling from source would help in this case, because the error seems to be related to a missing system (?) library and not to MPL or any of the backends. So, for the time being, it looks that I cannot use MPL with pyplot anymore, which is not entirely a huge problem (as I do not use the library in MATLAB-style anyway) , but prevents me to use it to fast testing of Basemap scripts. With best regards, 2009/1/12 John Hunter <jdh2...@gmail.com>: > On Mon, Jan 12, 2009 at 7:44 AM, Mauro Cavalcanti <mauro...@gmail.com> wrote: >> Dear ALL, >> >> I just found the following error when trying to run a very simple test >> MPL/Basemap script under Ubuntu Linux Intrepid. This does *not* happen >> when not importing MPL pyplot (for example, in a wxPython embedded >> app). >> >> Traceback (most recent call last): >> from matplotlib.backends.backend_gtk import gtk, FigureManagerGTK, >> FigureCanvasGTK,\ >> File >> "/usr/lib/python2.5/site-packages/matplotlib-0.98.5.1-py2.5-linux-i686.egg/matplotlib/backends/backend_gtk.py", >> line 25, in <module> >> from matplotlib.backends.backend_gdk import RendererGDK, FigureCanvasGDK >> File >> "/usr/lib/python2.5/site-packages/matplotlib-0.98.5.1-py2.5-linux-i686.egg/matplotlib/backends/backend_gdk.py", >> line 29, in <module> >> from matplotlib.backends._backend_gdk import pixbuf_get_pixels_array >> ImportError: libffi.so.4: cannot open shared object file: No such file >> or directory >> >> Any hints??? I am near panic now... > > No one ever made a dime by panicking :-) > > Did you compile mpl yourself or are you using a prepackaged version? > If you are using the ubuntu package of mpl, this is likely a bug with > the package and should be reported to ubuntu. If you compiled > yourself, what version are you using? Can you attach the output of a > clean build process? > > See:: > > > http://matplotlib.sourceforge.net/faq/troubleshooting_faq.html#reporting-problems > > > Note that the problem appears in the gtk backend, so if it turns out > to be an ubuntu problem and you need a solution right away, you should > be able to use a different backend, eg tkagg, but please take the time > to report it to the ubuntu package maintainer if it has not been > already. It looks like it is related to this debian bug > > http://osdir.com/ml/linux.debian.devel.python.modules/2008-05/msg00009.html > > I've CCd Sandro (the debian, not the ubuntu, maintainter) who may have > more information. > > JDH > -- Dr. Mauro J. Cavalcanti Ecoinformatics Studio P.O. Box 46521, CEP 20551-970 Rio de Janeiro, RJ, BRASIL E-mail: mauro...@gmail.com Web: http://studio.infobio.net Linux Registered User #473524 * Ubuntu User #22717 "Life is complex. It consists of real and imaginary parts." ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
