Router.__call__ does not handle interrupted system calls in select

[Ronen2]

I'm integrating pyxs within a twisted base application.
I hit an issue where the select.select() call within Router.call was interrupted.
This call is within a try block without any except clause. It does not handle interrupted system calls within the select system call.
It seems that any error from select.select() would end up with a select.error exception which is not caught and the Router connection is terminated.
Is it right to catch such exception and re-issue the select.select() call?

[superbobry]

Is it right to catch such exception and re-issue the select.select() call?

Yes, that sounds right. I'd welcome a PR with the try-except and a test for this!