Is your feature request related to a problem? Please describe.

Following #16377, and seeing that there is still work to be done (#16382, #16378, etc...) , it would be more effective to create a issue to track the advancement

Describe the solution you'd like

There is several aspects to this issue:

• Chose a minimal python version to be used ( 3.7 ? ) and make sure the python syntax is properly use in all python generator. some tooling like pyupgrade, can point at what needs to be changed by fixing the samples and changing the generator to achieve the same.
• Add type hints
• Fix the formatting ( once again, tooling to help: isort, black, flake, etc....)

Some optional points:

• check the dependencies, they might be outdated

Task list

• Define the minimal python version ( 3.7 ? ) and update the dependencies version accordingly
• Make sur the generated code syntaxes is up-to-date
• Improve the CI ( see @multani comment)
  • python: run the Python samples tests with GitHub Actions #16643
• Improve the type hinting and consider using the Annotated types like in [REQ][python-nextgen] Use Annotated with constrained types #15464
  • python: generate Pydantic v2 + typing complete code #16624
• TBD