Re: vim.command() always throw exception after KeyboardInterrupt

在 2013年10月19日星期六UTC+8上午1时01分43秒，ZyX写道：
> On Friday, October 18, 2013 7:12:52 PM UTC+4, ZyX wrote:
> > > now I redescribe my issue, I want to do some cleanup actions after ctrl-c is pressed. the code is as below:
> > > def func():
> > > try:
> > > while 1:
> > > xxx
> > > xxx
> > > except KeyboardInterrupt:
> > > vim.command("xxxx")
> > >
> > > then the issue occurs, how to resolve it?
> >
> > If xxx in a while cycle is pure python code (i.e. you did try to interrupt something that does not call vim.*) then it is a part of the known issue that python code is not interruptable. Nobody knows what to do without threads (though MarcWeber have written a patch for the *nix console, but for the gvim threads are needed).
> >
> > If it is not, then issue apparently was not known. Did you say that it is both vim-7.3 and vim-7.4 issue, though with different exception? The attached patch should fix the issue.
> >
> >
> > Note: it would be much better if you came up with an example with the real code and not xxx: if I see abstract code I evaluate it in mind (and hence e.g. have gotten to false conclusion that KeyboardInterrupt is not thrown). Though still wondering why I said about ignored SIGINT: I was absolutely sure I saw code for ignoring it.
> >
> >
> > # HG changeset patch
> > # User ZyX <kp-pav@ya.ru>
> > # Date 1382108836 -14400
> > # Fri Oct 18 19:07:16 2013 +0400
> > # Branch fix-py-vim-interrupt
> > # Node ID ce2b5adf52ff9b9ac37749e795d357d8b0a96f47
> > # Parent 92c9748e0ccbc42a5e28ce8fb9b8818e756a06da
> > Fix interrupt not being properly discarded in VimTryEnd
> >
> > diff -r 92c9748e0ccb -r ce2b5adf52ff src/if_py_both.h
> > --- a/src/if_py_both.h Sun Oct 06 17:46:56 2013 +0200
> > +++ b/src/if_py_both.h Fri Oct 18 19:07:16 2013 +0400
> > @@ -558,7 +558,11 @@
> > /* Keyboard interrupt should be preferred over anything else */
> > if (got_int)
> > {
> > - did_throw = got_int = FALSE;
> > + if (current_exception != NULL)
> > + discard_current_exception();
> > + else
> > + need_rethrow = did_throw = FALSE;
> > + got_int = FALSE;
> > PyErr_SetNone(PyExc_KeyboardInterrupt);
> > return -1;
> > }
> > @@ -567,7 +571,10 @@
> > /* Python exception is preferred over vim one; unlikely to occur though */
> > else if (PyErr_Occurred())
> > {
> > - did_throw = FALSE;
> > + if (current_exception != NULL)
> > + discard_current_exception();
> > + else
> > + need_rethrow = did_throw = FALSE;
> > return -1;
> > }
> > /* Finally transform VimL exception to python one */
>
> Propagated to vim-dev: https://groups.google.com/forum/#!topic/vim_dev/tZQJHSyjAzs.

why can't "signal.signal(signal.SIGINT, signal.SIG_IGN)" ignore SIGINT, is it a bug?

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