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1.1 Include Files

All function, type and macro definitions needed to use the Python/C API are included in your code by the following line:

      #include "Python.h"

This implies inclusion of the following standard headers: `<stdio.h>`, `<string.h>`, `<errno.h>`, and `<stdlib.h>` (if available).

All user visible names defined by Python.h (except those defined by the included standard headers) have one of the prefixes "`Py`" or "`_Py`". Names beginning with "`_Py`" are for internal use only. Structure member names do not have a reserved prefix.

Important: user code should never define names that begin with "`Py`" or "`_Py`". This confuses the reader, and jeopardizes the portability of the user code to future Python versions, which may define additional names beginning with one of these prefixes.