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| -rw-r--r-- | Doc/library/weakref.rst | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/Doc/library/weakref.rst b/Doc/library/weakref.rst index 12eb985..d3c3a07 100644 --- a/Doc/library/weakref.rst +++ b/Doc/library/weakref.rst @@ -163,14 +163,6 @@ Extension types can easily be made to support weak references; see application without adding attributes to those objects. This can be especially useful with objects that override attribute accesses. - .. note:: - - Caution: Because a :class:`WeakKeyDictionary` is built on top of a Python - dictionary, it must not change size when iterating over it. This can be - difficult to ensure for a :class:`WeakKeyDictionary` because actions - performed by the program during iteration may cause items in the - dictionary to vanish "by magic" (as a side effect of garbage collection). - .. versionchanged:: 3.9 Added support for ``|`` and ``|=`` operators, specified in :pep:`584`. @@ -192,14 +184,6 @@ than needed. Mapping class that references values weakly. Entries in the dictionary will be discarded when no strong reference to the value exists any more. - .. note:: - - Caution: Because a :class:`WeakValueDictionary` is built on top of a Python - dictionary, it must not change size when iterating over it. This can be - difficult to ensure for a :class:`WeakValueDictionary` because actions performed - by the program during iteration may cause items in the dictionary to vanish "by - magic" (as a side effect of garbage collection). - .. versionchanged:: 3.9 Added support for ``|`` and ``|=`` operators, as specified in :pep:`584`. |