* python: type generated client using Self
This doesn't offer a clear win but this helps for:
* Using modern types and making the typing intent clearer
* Decreasing the need for `from __future__ import annotations`, since a
class can now refer to itself without using its name
* Using more `cls` to automatically refer to the class, instead of
respecifying the class name every time
Self is available from Python 3.11 and is provided in typing_extensions
(since 4.0.0) as a fallback for older versions
See: https://peps.python.org/pep-0673/
See: https://github.com/python/typing_extensions/blob/main/CHANGELOG.md#added-in-version-400
* generate code
* add float as reserved world
* clean up
* update samples
* Update modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractPythonCodegen.java
Co-authored-by: Jonathan Ballet <jon@multani.info>
* update doc
* uncomment test
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Co-authored-by: Jonathan Ballet <jon@multani.info>
