Re: [matplotlib-devel] Is Tkinter-matplotlib using Threads?

[Fernando P. <fpe...@gm...>]

On Sun, Oct 10, 2010 at 12:49 PM, Friedrich Romstedt
<fri...@gm...> wrote:
>
> Second, I would be very interested in more information about the
> ipython -pylab threading.  What do you mean with "running all user
> code in a single separate thread"?  When it's not the thread importing
> Tkinter, the problem persists.
>

Two things to note:

- ipython, even in the 0.10 series, uses threads for the Qt, Gtk and
Wx backends, but *not* for Tk, because python automatically pumps the
Tk event loop when the console blocks on reading (via the C API
PyOSInputHook call).  So there is exactly *zero* threading added by
ipython in the specific case of a Tk backend.

- in the 0.11 ipython series, we abandoned threading altogether (it's
just too brittle) and moved to a model similar to the Tk one for *all*
backends, we now use PyOSInputHook with all mpl backends.

hth,

f