[IPython-dev] A request for help reviewing/testing a branch

Fernando Perez fperez.net at gmail.com
Sun Jan 10 01:05:28 EST 2010

2010/1/9 John Hunter <jdh2358 at gmail.com>:
> I was also able to test this with the default ubuntu 9.10 mpl and it
> worked fine.  Backend switching does not appear to work with "%pylab
> qt" and then "%pylab wx" or "%pylab tk" but I had read in a previous
> thread that there should be some limited support for backend
> switching....  What is the status here?

This particular ball is on your court:


Basically, just comment out in backends/__init__.py:use() this:

   if 'matplotlib.backends' in sys.modules:
       if warn: warnings.warn(_use_error_msg)

And uncomment in IPython/core/pylabtools.py these two lines:

    # XXX For now leave this commented out, but depending on discussions with
    # mpl-dev, we may be able to allow interactive switching...
    #import matplotlib.pyplot

Then, you should be able to switch backends.  We'll need to experiment
to figure out which ones work and which don't, and eventually we may
leave some of this available to end users.

Let me know how it goes, in my experience, qt4/wx seem to switch OK,
tk and gtk lock up.



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