Hello Doug, On 01/26/19 09:02, Doug Hellmann wrote: > We're still required to support python 2 through the beginning of the U > cycle [5]. Is it possible to apply the type hints in a way that allows > us to maintain that support? > > [5] https://governance.openstack.org/tc/resolutions/20180529-python2-deprecation-timeline.html There are two ways to apply type hints: 1) Use a new syntax that only works with Python 3 2) Use comments (see my github branch, where comments starting with "type:" can be found) I used the second approach in order to not break Python 2 compatibility. Regards, Cyril