bpo-40170: PyObject_NEW() becomes an alias to PyObject_New() by vstinner · Pull Request #19379 · python/cpython

The PyObject_NEW() macro becomes an alias to the PyObject_New()
macro, and the PyObject_NEW_VAR() macro becomes an alias to the
PyObject_NewVar() macro, to hide implementation details. They no
longer access directly the PyTypeObject.tp_basicsize member.

Move _PyObject_SIZE() and _PyObject_VAR_SIZE() macros to the
CPython-specific C API (Include/cpython/).

Replace PyObject_NEW() with PyObject_New() and replace
PyObject_NEW_VAR() with PyObject_NewVar().