feat: add Python example to list extensions associated with profiles

[ThinkOpenly]

$ ./tools/python/profile-extensions.py --profiles RVA23U64 gen/resolved_spec/_/
RVA23U64:
-  A = 2.1 mandatory
-  C = 2.0 mandatory
-  D = 2.2 mandatory
-  F = 2.2 mandatory
-  I ~> 2.1 mandatory
-  M = 2.0 mandatory
-  Supm ~>1.0 mandatory
-  U ~> 2.0 mandatory
-  V ~> 1.0 mandatory
-  Za64rs ~>1.0 mandatory
[...]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.05%. Comparing base (cbcb87e) to head (9791dbd).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1231   +/-   ##
=======================================
  Coverage   46.05%   46.05%           
=======================================
  Files          11       11           
  Lines        4942     4942           
  Branches     1345     1345           
=======================================
  Hits         2276     2276           
  Misses       2666     2666           

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[dhower-qc]

• Dumb Python question: What's the Python equivalent of a Ruby Gem? Should this wrapped in whatever that is (with other functions, too?)?
• I would suggest a new regression in regress.yml so this continues to work.

[ThinkOpenly]

Dumb Python question: What's the Python equivalent of a Ruby Gem? Should this wrapped in whatever that is (with other functions, too?)?

Probably a Python module. If we wanted to start building a Python infrastructure, we could certainly go that route. There is some similar infrastructure emerging in backends/generators, which we could organize as a more general set of utilities/functions.

One of the motivations, though, was just to have a short example showing a practical use of UDB from Python: load YAML, walk through it and do something interesting with the data.

Refactoring would likely make the example even simpler by some measurement, since the "load YAML" part would be refactored out. I'll work on that.

I would suggest a new regression in regress.yml so this continues to work.

That can be done. I suppose we might want to use the "golden reference" approach. I should add a chore for updating all of the golden references, because this will likely become a common approach, and updating them each individually will be a pain.

[dhower-qc]

Refactoring would likely make the example even simpler by some measurement, since the "load YAML" part would be refactored out. I'll work on that.

Excellent

I suppose we might want to use the "golden reference" approach.

We might also get away with comparing the python "list extension" to the ruby "list extension"

[ThinkOpenly]

I suppose we might want to use the "golden reference" approach.

We might also get away with comparing the python "list extension" to the ruby "list extension"

Does the ruby "list extension" tag or filter by containing profile?

[jordancarlin]

We should avoid using an empty list as a default argument. It can create some very strange results if a function is called multiple times. See https://docs.astral.sh/ruff/rules/mutable-argument-default/ for more details.