Look here:

http://hg.python.org/cpython/file/3313ce92cef7/Lib/smtplib.py#l279

`port` and `host` are confused.

I saw this is fixed on 3.2; possibly it should be fixed in the next 2.7 micro release too.

Added a ridiculously simple patch, in case it is going to get fixed in 2.7.

Well, your patch is a little *too* simple: it doesn't change the function prototype to match :)

This is a cosmetic issue rather than a bug, but it would still be nice to fix it.  Or maybe a documentation issue in the sense that Python code is (usually) self documenting :)

The reason this bug bothered me is because I was debugging a Django app, and in the stacktrace's local variables I suddenly saw that `host` was `25`, which seemed like a bug to me and wasted me 5 minutes. So it's not a critical bug but it wasted my time.

It was strange it was *that* easy. My newbie apologies, David. Let me take a look at it -- hopefully it will be an adequate first task for a newcomer.

Patch updated. It is now a two-line patch. How impressive :-)
Anyway, I have verified that the entire test suite runs without failure.
Should Misc/NEWS be updated for such a trivial modification?

My understanding is that an undocumented internal methods has two bugs that cancel, so that correct calls work correctly -- but tracebacks do not. I think this should be fixed, especially given a working patch.

Optionally add a doc string, which is how we usually (often, when someone gets around to it) do doc internal functions. Perhaps include the current comment (which I do not understand).

If you, Victor, are not in the contributors file, add a one-line patch for that.

Optionally (but it would certainly be good learning practice) add NEWS item. Something like
"Issue 13163: fix smtplib.SMTP._get_socket so that tracebacks correctly identity host and port arguments.
However, this is best done when someone is ready to apply and push the patch, as frequent changes to NEWS make patches stale.

I have added a docstring to _get_socket.

My proposed news entry is almost exactly what you suggested (I have just replaced 'identity' with 'identify'): 
"Issue #13163: Fix smtplib.SMTP._get_socket so that tracebacks correctly identify host and port arguments."

New changeset 5d99042bd40f by R David Murray in branch '2.7':
#13163: fix names of _get_socket args
http://hg.python.org/cpython/rev/5d99042bd40f

Thanks Victor.  I decided not to put in the doc string because Python3 doesn't have one.