Name	Size	Mode	Actions
abstract.rst.txt	715	0644	editdlrm
allocation.rst.txt	2653	0644	editdlrm
apiabiversion.rst.txt	2242	0644	editdlrm
arg.rst.txt	30651	0644	editdlrm
bool.rst.txt	1200	0644	editdlrm
buffer.rst.txt	22267	0644	editdlrm
bytearray.rst.txt	2250	0644	editdlrm
bytes.rst.txt	9211	0644	editdlrm
capsule.rst.txt	5741	0644	editdlrm
cell.rst.txt	1940	0644	editdlrm
code.rst.txt	1666	0644	editdlrm
codec.rst.txt	4799	0644	editdlrm
complex.rst.txt	3946	0644	editdlrm
concrete.rst.txt	2046	0644	editdlrm
conversion.rst.txt	5516	0644	editdlrm
coro.rst.txt	820	0644	editdlrm
datetime.rst.txt	6415	0644	editdlrm
descriptor.rst.txt	1111	0644	editdlrm
dict.rst.txt	7952	0644	editdlrm
exceptions.rst.txt	47814	0644	editdlrm
file.rst.txt	3248	0644	editdlrm
float.rst.txt	2243	0644	editdlrm
function.rst.txt	3348	0644	editdlrm
gcsupport.rst.txt	6057	0644	editdlrm
gen.rst.txt	1301	0644	editdlrm
import.rst.txt	12825	0644	editdlrm
index.rst.txt	613	0644	editdlrm
init.rst.txt	52383	0644	editdlrm
intro.rst.txt	28751	0644	editdlrm
iter.rst.txt	1129	0644	editdlrm
iterator.rst.txt	1640	0644	editdlrm
list.rst.txt	4735	0644	editdlrm
long.rst.txt	10436	0644	editdlrm
mapping.rst.txt	2871	0644	editdlrm
marshal.rst.txt	3561	0644	editdlrm
memory.rst.txt	21369	0644	editdlrm
memoryview.rst.txt	2348	0644	editdlrm
method.rst.txt	2818	0644	editdlrm
module.rst.txt	18266	0644	editdlrm
none.rst.txt	740	0644	editdlrm
number.rst.txt	10583	0644	editdlrm
objbuffer.rst.txt	2198	0644	editdlrm
object.rst.txt	17420	0644	editdlrm
objimpl.rst.txt	304	0644	editdlrm
refcounting.rst.txt	2909	0644	editdlrm
reflection.rst.txt	1417	0644	editdlrm
sequence.rst.txt	6547	0644	editdlrm
set.rst.txt	6144	0644	editdlrm
slice.rst.txt	2404	0644	editdlrm
stable.rst.txt	1969	0644	editdlrm
structures.rst.txt	13787	0644	editdlrm
sys.rst.txt	9944	0644	editdlrm
tuple.rst.txt	8031	0644	editdlrm
type.rst.txt	3963	0644	editdlrm
typeobj.rst.txt	60184	0644	editdlrm
unicode.rst.txt	68074	0644	editdlrm
utilities.rst.txt	414	0644	editdlrm
veryhigh.rst.txt	16655	0644	editdlrm
weakref.rst.txt	2635	0644	editdlrm

.. highlightlang:: c .. _weakrefobjects: Weak Reference Objects ---------------------- Python supports *weak references* as first-class objects. There are two specific object types which directly implement weak references. The first is a simple reference object, and the second acts as a proxy for the original object as much as it can. .. c:function:: int PyWeakref_Check(ob) Return true if *ob* is either a reference or proxy object. .. c:function:: int PyWeakref_CheckRef(ob) Return true if *ob* is a reference object. .. c:function:: int PyWeakref_CheckProxy(ob) Return true if *ob* is a proxy object. .. c:function:: PyObject* PyWeakref_NewRef(PyObject *ob, PyObject *callback) Return a weak reference object for the object *ob*. This will always return a new reference, but is not guaranteed to create a new object; an existing reference object may be returned. The second parameter, *callback*, can be a callable object that receives notification when *ob* is garbage collected; it should accept a single parameter, which will be the weak reference object itself. *callback* may also be ``None`` or *NULL*. If *ob* is not a weakly-referencable object, or if *callback* is not callable, ``None``, or *NULL*, this will return *NULL* and raise :exc:`TypeError`. .. c:function:: PyObject* PyWeakref_NewProxy(PyObject *ob, PyObject *callback) Return a weak reference proxy object for the object *ob*. This will always return a new reference, but is not guaranteed to create a new object; an existing proxy object may be returned. The second parameter, *callback*, can be a callable object that receives notification when *ob* is garbage collected; it should accept a single parameter, which will be the weak reference object itself. *callback* may also be ``None`` or *NULL*. If *ob* is not a weakly-referencable object, or if *callback* is not callable, ``None``, or *NULL*, this will return *NULL* and raise :exc:`TypeError`. .. c:function:: PyObject* PyWeakref_GetObject(PyObject *ref) Return the referenced object from a weak reference, *ref*. If the referent is no longer live, returns :const:`Py_None`. .. note:: This function returns a **borrowed reference** to the referenced object. This means that you should always call :c:func:`Py_INCREF` on the object except if you know that it cannot be destroyed while you are still using it. .. c:function:: PyObject* PyWeakref_GET_OBJECT(PyObject *ref) Similar to :c:func:`PyWeakref_GetObject`, but implemented as a macro that does no error checking.