[IPython-dev] Interactive wx/pylab with no threads (PyOS_InputHook)
prabhu at aero.iitb.ac.in
Thu Feb 12 05:40:21 EST 2009
On 02/09/09 05:38, Brian Granger wrote:
> IPython and matplotlib devs,
> Over the weekend I have been playing around to see if it is possible
> to do interactive GUI work with wx from IPython *without using
> threads*. The idea here is to use PyOS_InputHook. Currently, recent
> versions of PyQt4 and PyGTK do this and if we can get wx working, we
> can probably get rid of IPython's subtle threaded shells that
> currently allow interactive GUIs to work.
> I am attaching a Cython module that mostly works. Here is a simple
> example that works in IPython (without the -wthread option!)
> I don't have any more time to work on this right now, but I at least
> wanted to share my findings with both IPython and matplotlib devs. It
> would be great if someone familiar with wx could try to figure out the
> remaining issues. If there are no takers here, I might eventually see
> if wxpython itself is interested in this code (that is probably where
> it really belongs anyway).
This is cool! It works with mayavi, which is a pretty demanding test.
I did run into problems with pyximport messing up on some imports but
manually importing the inputhook.so fixed those. The interactive
response is not snappy but it definitely works without a problem.
One problem I can see with this is that while it does eliminate the
threading, there are still issues with multiple toolkits. It would be
neat if there were a system where you could mix toolkits too -- it looks
like it should be possible to support this though.
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