Open Stack

Hi oslo folks (and others),

I've recently put up a review for some common deprecation patterns:

https://review.openstack.org/#/c/140119/

In summary, this is a common set of patterns that can be used by oslo 
libraries, other libraries... This is different from the versionutils 
one (which is more of a developer<->operator deprecation interaction) 
and is more focused on the developer <-> developer deprecation 
interaction (developers say using oslo libraries).

Doug had the question about why not just put this out there on pypi with 
a useful name not so strongly connected to oslo; since that review is 
more of a common set of patterns that can be used by libraries outside 
openstack/oslo as well. There wasn't many/any similar libraries that I 
found (zope.deprecation is probably the closest) and twisted has 
something in-built to it that is something similar. So in order to avoid 
creating our own version of zope.deprecation in that review we might as 
well create a neat name that can be useful for oslo/openstack/elsewhere...

Some ideas that were thrown around on IRC (check 
'https://pypi.python.org/pypi/%s' % name for 404 to see if likely not 
registered):

* debtcollector
* bagman
* deprecate
* deprecation
* baggage

Any other neat names people can think about?

Or in general any other comments/ideas about providing such a 
deprecation pattern library?

-Josh