cpython/Include/internal/pycore_tuple.h

#ifndef Py_INTERNAL_TUPLE_H
#define Py_INTERNAL_TUPLE_H
#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_BUILD_CORE
#  error "this header requires Py_BUILD_CORE define"
#endif

extern void _PyTuple_MaybeUntrack(PyObject *);
extern void _PyTuple_DebugMallocStats(FILE *out);

/* runtime lifecycle */

extern PyStatus _PyTuple_InitGlobalObjects(PyInterpreterState *);


/* other API */

#define _PyTuple_ITEMS(op) _Py_RVALUE(_PyTuple_CAST(op)->ob_item)

extern PyObject *_PyTuple_FromArray(PyObject *const *, Py_ssize_t);
PyAPI_FUNC(PyObject *)_PyTuple_FromStackRefSteal(const union _PyStackRef *, Py_ssize_t);
PyAPI_FUNC(PyObject *)_PyTuple_FromArraySteal(PyObject *const *, Py_ssize_t);

typedef struct {
    PyObject_HEAD
    Py_ssize_t it_index;
    PyTupleObject *it_seq; /* Set to NULL when iterator is exhausted */
} _PyTupleIterObject;

#ifdef __cplusplus
}
#endif
#endif   /* !Py_INTERNAL_TUPLE_H */