[IPython-User] vim-ipython: misuse of waitforbuttonpress leaves kernel unresponsive

[Paul Ivanov]

Jorge Scandaliaris, on 2011-08-06 18:35,  wrote:
> I run a file through vim-ipython that uses 
> plt.waitforbuttonpress(timeout=0) for showing some matplotlib plots. A 
> couple of figures appear, and uppon pressing some key the get updated. 
> Accidentally (actually, I used to do this all the time, without any side 
> effects, when I wanted to stop for some reason without showing all the 
> updates) I just closed the figures and after that I could not interact 
> anymore with the ipython kernel, not from vim nor the qtconsole.
> I guess the kernel is left waiting (infinitely) for my key press without 
> noticing I just killed the figures. Is there any way, other than 
> allowing the script to end by itself, to stop a script running in the 
> kernel?

Hi Jorge,

Sounds like you ran into an IPython bug - where stdin is
scheduled around to the different kernel managers instead of
being accepted from any of them: 
https://github.com/ipython/ipython/issues/673

The workaround for the time being is to have vim IPython send
stdin message. In vim, do something like

:py km.stdin_channel.input(' ')

best,
-- 
Paul Ivanov
314 address only used for lists,  off-list direct email at:
http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 
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