[Python-Dev] Re: Please update Cython *before* introcuding C API incompatible changes in Python

On 2/02/22 8:48 am, Guido van Rossum wrote:

It seems to me that a big part of the problem is that Cython feels entitled to use arbitrary CPython internals.

I think the reason for this is that Cython is trying to be two things at once: (1) an interface between Python and C, (2) a compiler that turns Python code into fast C code.

To address this there could be an option to choose between "compatible code" and "fast code", with the former restricting itself to the stable API.