Cppy (Python C++ Extension Headers)

Cppy is a small C++ header library designed to simplify the creation of Python extension modules. Its core feature is a `PyObject` smart pointer, which automates Python's reference counting mechanism and provides convenient methods for common object operations. The current version is 1.3.1. As a C++ header library, its release cadence is typically driven by CPython API changes or new convenience features rather than a fixed schedule.