Re: [Matplotlib-users] error with embedding_in_wx.py

[John W. <jd...@go...>]

I have been running from the prompt all along. The command line is:

wohlbier@gyrotwystron examples $ python embedding_in_wx.py
Could not import mathtext (build with ft2font)

GThread-ERROR **: GThread system may only be initialized once.
aborting...
Aborted
wohlbier@gyrotwystron examples $


If running from the command line, does .matplotlibrc make a difference?
I did set the default backend in this file to WX.

I am on gentoo linux, python 2.3.3, wxPython 2.4.1.2, matplotlib 0.51,
executing from the command line as above, from the directory
/usr/lib/python2.3/site-packages/matplotlib-0.51/examples/

Let me know if you need something more about my setup.

jgw


>     John> I get the error even using 0.51. Maybe my wxPython is
>     John> broken. Do you know of a way I can test it?
>
> The example runs fine on my systm.
>
> Something funny is going on.  wx does not attempt to load mathtext,
> either in 0.51 or in CVS.  That, and the fact that you are getting a
> gthread error, make me suspect you are actually loading the gtk
> backend.
>
> Are you trying to run embedding_in_wx from the prompt or from a
> development environment such as pycrust?  If you run from the prompt,
> you shouldn't see that error.  If not, you may be loading the default
> backend (GTK) first in your development environment and then trying to
> run embedding_in_wx.
>
> For example, if you first import matplotlib and later try to run
> embedding_in_wx in the same python/pycrust session, you will get
> yourself into a world of trouble, since the default import loads GTK and
> the second one WX.  These two cannot peacefully coexist.
>
> Try running the examples from the linux shell or DOS prompt first. Have
> you read the information about how to select the various backends on
> http://matplotlib.sourceforge.net/backends.html?
>
> You can change your default backend (eg to WX) in you .matplotlibrc
> file.
>
>   http://matplotlib.sourceforge.net/faq.html#MATPLOTLIBRC
>   http://matplotlib.sourceforge.net/.matplotlibrc
>
> If you still encounter problems, please tell me exactly what you are
> doing: what platform, how you are trying to run the example etc...
>
> Hope this helps,
> JDH