Microsoft's Python in Visual Studio Code dev team introduced three new extensions: Black Formatter, isort and Jupyter Powertoys. The new tools, included in the May 2022 release of the Python and ...

As the name implies, pure Python mode uses native Python syntax to express Cython’s behaviors and constructs, making it much easier for Python programmers to get started with Cython.

They are building it on top of Python 2.6 (2.x is not dead yet) because it will allow many existing projects to adopt it and will also provide a clean glide path to Python 3.