Code review comment for lp:~mpontillo/maas/networking-constraints-django-form-support

The "workaround" way to do this in Python 2 is to use sys.exc_info() to capture sys.exc_info()[2] (the traceback at the time the exception is being handled).

I want to save the traceback for later, and there seem to be some caveats to doing this[1]. So I'll just keep it as-is until we drop support for Python 2.

[1]: https://docs.python.org/2/library/sys.html#sys.exc_info