Tidying up Python

[Bjarne D Mathiesen]

regarding having more than one python version installed:

What often happens is, that you have a port, that needs python, like eg
this:
#=> port info certbot
certbot @4.1.1 (security)
Variants: docs, python310, python311, python312, [+]python313, python39

As you can see, the default is currently python313, !but! if you
installed certbot, when python312 was the default, it doesn't
automagically get updated to python313 .

Thus, when a new major version of python gets released, you'll have to
manually check which ports are dependent on the old major version, and
see, if they have been updated to the latest major version.

In my case, I'm still having python311 around because
#=> port dependents python311 | grep -v py311-
docker-compose depends on python311
#=> port info docker-compose
docker-compose @1.29.2_1 (python, devel)
Build Dependencies: py311-build, py311-installer, py311-setuptools,
py311-wheel
Library Dependencies: py311-distro, py311-docker, py311-dockerpty,
py311-docopt, py311-jsonschema, py311-python-dotenv, py311-requests,
py311-six, py311-socks, py311-texttable, py311-websocket-client,
py311-yaml, python311

When checking for dependency on a previous version of python, I do this:
#=> port dependents python311 | grep -v py311

Then, I explicitly upgrade the python variant like this:
port -cuN upgrade --enforce-variants certbot -python312 +python313

-- 
Bjarne D Mathiesen
Slagelse ; Danmark ; Europa
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