Coroutine objects are what functions declared with an async keyword return.

PyCoroObject

The C structure used for coroutine objects.

PyTypeObject PyCoro_Type

The type object corresponding to coroutine objects.

int PyCoro_CheckExact ( PyObject  *ob )

Return true if ob’s type is PyCoro_Type; ob must not be NULL.

PyObject* PyCoro_New ( PyFrameObject  *frame, PyObject  *name, PyObject  *qualname )

Return value: New reference.

Create and return a new coroutine object based on the frame object, with __name__ and __qualname__ set to name and qualname. A reference to frame is stolen by this function. The frame argument must not be NULL.