That's because you need to explicitly import/define sig_on and sig_off. I
guess that this is done automatically when the extension is .spyx.
In the file sage/graphs/cliquer.pyx it is done with the line :
include "sage/ext/interrupt.pxi"
Nathann
On Sunday, August 17, 2014 10:11:48 PM UTC+2, Paul Mercat wrote:
>
> Hi !
>
> I have writed some C code that I've integrated to sage using a .spyx file,
> and it work well.
> But when I put it in the sage source code and replace the .spyx extension
> by .pyx, the functions sig_on() and sig_off() doesn't work anymore (if I
> avoid them, it works well).
> I get the following error :
> {{{
> sage/combinat/words/cautomata.pyx:364:14: undeclared name not builtin:
> sig_on
> }}}
> Do you know why there is this error and how to fix it ?
>
> Thanks,
> Paul
>
>
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