Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859

#ifndef Py_ENUMOBJECT_H
#define Py_ENUMOBJECT_H

/* Enumerate Object */

#ifdef __cplusplus
extern "C" {
#endif

PyAPI_DATA(PyTypeObject) PyEnum_Type;
PyAPI_DATA(PyTypeObject) PyReversed_Type;

#ifdef __cplusplus
}
#endif

#endif /* !Py_ENUMOBJECT_H */