http://code.activestate.com/recipes/tags/weakref-signal/2013-07-29T05:35:55-07:00ActiveState Code Recipes2013-07-29T05:35:55-07:00Esteban Castro Borsanihttp://code.activestate.com/recipes/users/4184010/http://code.activestate.com/recipes/578298-bound-method-weakref/

<p style="color: grey"> Python recipe 578298 by <a href="/recipes/users/4184010/">Esteban Castro Borsani</a> (<a href="/recipes/tags/oop/">oop</a>, <a href="/recipes/tags/python/">python</a>, <a href="/recipes/tags/weakref/">weakref</a>). Revision 4. </p> <p>This is a workaorund for weak reference bound methods. It may be useful for observer patterns.</p>

2011-02-20T16:26:38-08:00Hui Zhanghttp://code.activestate.com/recipes/users/4177055/http://code.activestate.com/recipes/577580-weak-reference-map/

<p style="color: grey"> Python recipe 577580 by <a href="/recipes/users/4177055/">Hui Zhang</a> (<a href="/recipes/tags/python/">python</a>, <a href="/recipes/tags/weakref/">weakref</a>). Revision 2. </p> <p>keep (key, value)s in a map.</p> <p>if key or value was garbage collected, remove the corresponding records.</p>

2011-07-02T18:42:08-07:00Benjamin Petersonhttp://code.activestate.com/recipes/users/4170802/http://code.activestate.com/recipes/577242-calling-c-level-finalizers-without-__del__/

<p style="color: grey"> Python recipe 577242 by <a href="/recipes/users/4170802/">Benjamin Peterson</a> (<a href="/recipes/tags/ctypes/">ctypes</a>, <a href="/recipes/tags/finalization/">finalization</a>, <a href="/recipes/tags/weakref/">weakref</a>). Revision 3. </p> <p>This recipe is meant for Python classes wrapping ctypes bindings where a C-level finalizer must be invoked when the wrapper is destroyed. It uses weakref callbacks to avoid problems with <code>__del__</code>.</p>