This bug was fixed in the package python-apt - 1.9.3ubuntu2
--------------- python-apt (1.9.3ubuntu2) focal; urgency=medium
* Revert "apt.Cache: cache apt.package.Origin objects by id"
-- Julian Andres Klode <email address hidden> Tue, 17 Dec 2019 19:24:36 +0100
This bug was fixed in the package python-apt - 1.9.3ubuntu2
---------------
python-apt (1.9.3ubuntu2) focal; urgency=medium
* Revert "apt.Cache: cache apt.package.Origin objects by id"
-- Julian Andres Klode <email address hidden> Tue, 17 Dec 2019 19:24:36 +0100