In one week (2021-11-18), or slightly later, I will merge and build https://src.fedoraproject.org/rpms/python-absl-py/pull-request/1, updating python-absl-py to 1.0.0 in Rawhide.
In this release, upstream drops support for obsolete Python versions (<3.6). This means the “absl.third_party.unittest3_backport” code is no longer needed and has been removed. This is technically a breaking API change—thus this advance notice—but I do not expect it to affect anyone in practice.
Furthermore, the license changes from “ASL 2.0 and Python” to “ASL 2.0”, since the unittest3_backport code was the Python-licensed part of the package.