This part of the documentation from https://docs.python.org/3/extending/extending.html#a-simple-example is currently outdated:

All user-visible symbols defined by Python.h have a prefix of Py or PY, except those defined in standard header files. For convenience, and since they are used extensively by the Python interpreter, "Python.h" includes a few standard header files: <stdio.h>, <string.h>, <errno.h>, and <stdlib.h>. If the latter header file does not exist on your system, it declares the functions malloc(), free() and realloc() directly.

This PR aligns the documentation with the code and the comments provided by the original author that implemented the changes.

• Issue: Outdated documentation for including <errno.h>, <stdio.h>, <stdlib.h> and <string.h> in Python.h #136823

📚 Documentation preview 📚: https://cpython-previews--136824.org.readthedocs.build/