Can it emulate CPython? So, can you do reverse debugging of Python? I think this would be interesting.

Blink can absolutely emulate CPython. https://twitter.com/JustineTunney/status/1611264272637775873

I recommend obtaining Python from the Comsopolitan mono repo:

    git clone https://github.com/jart/cosmopolitan
    make -j8 o//third_party/python/python.com
That'll easily give you a static Python 3.6 binary that can be run under Blink.