Links
=====

* `Python/C API Reference Manual `_
* `HPy: a better API for Python
  `_
* `Cython: C-extensions for Python
  `_
* `Old 2to3c project `_ by David Malcolm
  which uses `Coccinelle `_
  to ease migration of C extensions from Python 2 to Python 3. See
  also `2to3c: an implementation of Python's 2to3 for C code
  `_ article (2009).
* PEPs related to the C API:

  * `PEP 620 -- Hide implementation details from the C API
    `_
  * `PEP 670 -- Convert macros to functions in the Python C API
    `_
  * `PEP 674 -- Disallow using macros as l-values
    `_

* Make structures opaque

  * `bpo-39573: PyObject `_
  * `bpo-40170: PyTypeObject `_
  * `bpo-39947: PyThreadState `_
  * `bpo-40421: PyFrameObject `_
  * `bpo-47241: PyCodeObject `_