Old C API — pythoncapi 0.1 documentation (original) (raw)

The “current” or “old” C API is the Python 3.7 API which “leaks” implementation details like PyObject.ob_refcnt through Py_INCREF() macro.

With the new C API, the old C API will remain available thanks to theregular runtime, for CPython internals, for specific use cases like Cython (for best performances) anddebugging tools, but also for the long tail of C extensions on PyPI.

See also Calling conventions.

What is the Python C API?¶

• Python objects
  • Protocol, Abstract
  • Types, Classes
• Memory Allocators
• Python initialization and configuration
• Control flow
  • Generator
  • Exception: PyErr_SetString(), PyErr_Clear()

Current Python C API¶

• CPython:headers of the Include/ directory
• PyPy cpyext:pypy/module/cpyext/(cpyext/stubs.py)