Van Rossum G., Drake F.L. Python/C API Reference Manual

This manual documents the API used by C and C++ programmers who want to write extension modules or embed Python. It is a companion to Extending and Embedding the Python Interpreter, which describes the general principles of extension writing but does not document the API functions in detail.
Warning: The current version of this document is incomplete. I hope that it is nevertheless useful. I will continue to work on it, and release new versions from time to time, independent from Python source code releases.Include Files.
Objects, Types and Reference Counts.
Exceptions.
Embedding Python.
The Very High Level Layer.
Reference Counting.
Exception Handling.
Standard Exceptions.
Deprecation of String Exceptions.
Utilities.
OS Utilities.
Process Control.
Importing Modules.
Abstract Objects Layer.
Object Protocol.
Number Protocol.
Sequence Protocol.
Mapping Protocol.
Concrete Objects Layer.
Fundamental Objects.
Sequence Objects.
Mapping Objects.
Numeric Objects.
Other Objects.
Initialization, Finalization, and Threads.
Thread State and the Global Interpreter Lock.
Memory Management.Overview.Memory Interface.
Examples.
De ning New Object Types.
Common Object Structures.
Mapping Object Structures.
Number Object Structures.
Sequence Object Structures.
Buer Object Structures.
A Reporting Bugs.