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Diffstat (limited to 'Doc/library/weakref.rst')
| -rw-r--r-- | Doc/library/weakref.rst | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/Doc/library/weakref.rst b/Doc/library/weakref.rst index 10b69c9..63545ab 100644 --- a/Doc/library/weakref.rst +++ b/Doc/library/weakref.rst @@ -8,6 +8,9 @@ .. moduleauthor:: Martin von Löwis <martin@loewis.home.cs.tu-berlin.de> .. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org> +**Source code:** :source:`Lib/weakref.py` + +-------------- The :mod:`weakref` module allows the Python programmer to create :dfn:`weak references` to objects. @@ -59,8 +62,11 @@ is exposed by the :mod:`weakref` module for the benefit of advanced uses. Not all objects can be weakly referenced; those objects which can include class instances, functions written in Python (but not in C), instance methods, sets, frozensets, some :term:`file objects <file object>`, :term:`generator`\s, type -objects, sockets, arrays, deques and regular expression pattern objects. +objects, sockets, arrays, deques, regular expression pattern objects, and code +objects. +.. versionchanged:: 3.2 + Added support for thread.lock, threading.Lock, and code objects. Several built-in types such as :class:`list` and :class:`dict` do not directly support weak references but can add support through subclassing:: |