Hi All,
As you know, we have a flag 'python_requires' in setup.cfg which is pinned to the minimum python version supported[1]. Every time we upgrade our Python testing, we usually bump the minimum python version in setup.cfg and that prevents the project from being installed on lower Python versions. We do have list of tested and supported Python versions in setup.cfg classifier, which is good and enough information to tell what all Python versions are tested[2].
Flag 'python_requires' creates an issue (which has happened many times in the past) when a dependency like oslo lib bumps the version, and it makes all projects testing old Python versions fail. I know we should remove the old Python versions tested from projects first, but somehow, we all are busy, and a coordinated effort is always missed.
IMO, we should remove this flag as it creates more issues than benefits. opinion? It will also help to continue users to install things on old python versions if it is working for them.
[1] https://github.com/openstack/nova/blob/8c1a47c9cf6e1001fbefd6ff3b76314e39c81... [2] https://github.com/openstack/nova/blob/8c1a47c9cf6e1001fbefd6ff3b76314e39c81...
-gmann