diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/weakref.rst | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Doc/library/weakref.rst b/Doc/library/weakref.rst index 2ad1e56..224f442 100644 --- a/Doc/library/weakref.rst +++ b/Doc/library/weakref.rst @@ -24,7 +24,10 @@ by a weak reference. A weak reference to an object is not enough to keep the object alive: when the only remaining references to a referent are weak references, :term:`garbage collection` is free to destroy the referent and reuse its memory -for something else. A primary use for weak references is to implement caches or +for something else. However, until the object is actually destroyed the weak +reference may return the object even if there are no strong references to it. + +A primary use for weak references is to implement caches or mappings holding large objects, where it's desired that a large object not be kept alive solely because it appears in a cache or mapping. |