Name	Size	Mode	Actions
abstract.rst.txt	702	0644	editdlrm
allocation.rst.txt	4796	0644	editdlrm
arg.rst.txt	26004	0644	editdlrm
bool.rst.txt	1304	0644	editdlrm
buffer.rst.txt	22965	0644	editdlrm
bytearray.rst.txt	2181	0644	editdlrm
capsule.rst.txt	5741	0644	editdlrm
cell.rst.txt	1940	0644	editdlrm
class.rst.txt	1866	0644	editdlrm
cobject.rst.txt	1870	0644	editdlrm
code.rst.txt	1635	0644	editdlrm
codec.rst.txt	4643	0644	editdlrm
complex.rst.txt	4079	0644	editdlrm
concrete.rst.txt	1963	0644	editdlrm
conversion.rst.txt	7092	0644	editdlrm
datetime.rst.txt	6413	0644	editdlrm
descriptor.rst.txt	1296	0644	editdlrm
dict.rst.txt	7757	0644	editdlrm
exceptions.rst.txt	35304	0644	editdlrm
file.rst.txt	6198	0644	editdlrm
float.rst.txt	3371	0644	editdlrm
function.rst.txt	2421	0644	editdlrm
gcsupport.rst.txt	6587	0644	editdlrm
gen.rst.txt	920	0644	editdlrm
import.rst.txt	11221	0644	editdlrm
index.rst.txt	578	0644	editdlrm
init.rst.txt	49160	0644	editdlrm
int.rst.txt	4578	0644	editdlrm
intro.rst.txt	28473	0644	editdlrm
iter.rst.txt	1390	0644	editdlrm
iterator.rst.txt	1796	0644	editdlrm
list.rst.txt	6362	0644	editdlrm
long.rst.txt	7987	0644	editdlrm
mapping.rst.txt	2874	0644	editdlrm
marshal.rst.txt	3985	0644	editdlrm
memory.rst.txt	11556	0644	editdlrm
method.rst.txt	2099	0644	editdlrm
module.rst.txt	3867	0644	editdlrm
none.rst.txt	697	0644	editdlrm
number.rst.txt	11939	0644	editdlrm
objbuffer.rst.txt	2516	0644	editdlrm
object.rst.txt	17491	0644	editdlrm
objimpl.rst.txt	305	0644	editdlrm
refcounting.rst.txt	2934	0644	editdlrm
reflection.rst.txt	1567	0644	editdlrm
sequence.rst.txt	8716	0644	editdlrm
set.rst.txt	6588	0644	editdlrm
slice.rst.txt	2979	0644	editdlrm
string.rst.txt	15422	0644	editdlrm
structures.rst.txt	14966	0644	editdlrm
sys.rst.txt	5714	0644	editdlrm
tuple.rst.txt	5491	0644	editdlrm
type.rst.txt	2761	0644	editdlrm
typeobj.rst.txt	66936	0644	editdlrm
unicode.rst.txt	45126	0644	editdlrm
utilities.rst.txt	415	0644	editdlrm
veryhigh.rst.txt	13363	0644	editdlrm
weakref.rst.txt	2820	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. .. versionadded:: 2.2 .. c:function:: int PyWeakref_CheckRef(ob) Return true if *ob* is a reference object. .. versionadded:: 2.2 .. c:function:: int PyWeakref_CheckProxy(ob) Return true if *ob* is a proxy object. .. versionadded:: 2.2 .. 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`. .. versionadded:: 2.2 .. 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`. .. versionadded:: 2.2 .. 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`. .. versionadded:: 2.2 .. warning:: 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. .. versionadded:: 2.2