I write the same letter third time with a note of despair. 2019-06-03 I have created PR https://github.com/python/cpython/pull/13772 , which adds IPv6 scoped addresses support to ipaddress module.
It is critical to everyone, who is dealing with IPv6 networking. For example, in salt project they use patched module.
So, it would be very nice to have my changes merged and avoid such a workarounds.
Pull request stucked at core review stage. Great thanks to @asvetlov, who began core review, but requested changes remain without review from Dec 9, 2019. Seems, that currently there is no maintainer of ipaddress module.
Here is link to the bug - https://bugs.python.org/issue34788.
Core developers, please, pay attention to this issue.