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Diffstat (limited to 'Doc/library/weakref.rst')
| -rw-r--r-- | Doc/library/weakref.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/library/weakref.rst b/Doc/library/weakref.rst index 9aaa58a..a667479 100644 --- a/Doc/library/weakref.rst +++ b/Doc/library/weakref.rst @@ -69,6 +69,10 @@ support weak references but can add support through subclassing:: obj = Dict(red=1, green=2, blue=3) # this object is weak referenceable +Other built-in types such as :class:`tuple` and :class:`int` do not support +weak references even when subclassed (those types implemented as a +:ctype:`PyVarObject`). + Extension types can easily be made to support weak references; see :ref:`weakref-support`. |