--- Revision None
+++ Revision 363730643234
@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+
+_instances = {}
+
+class Wrapper(object):
+
+    def __new__(cls, **kwargs):
+        instance = object.__new__(cls)
+        instance.__init__(**kwargs)
+        if instance.uuid in _instances:
+            cached = _instances[instance.uuid]
+            for attr in kwargs.items():
+                setattr(cached, *attr)
+            return cached
+        else:
+            _instances[instance.uuid] = instance
+            return instance
+
+    @property
+    def uuid(self):
+        raise NotImplementedError()
+
+class Test(Wrapper):
+
+    def __init__(self, name=None):
+        self.name = name
+
+    @property
+    def uuid(self):
+        return self.name
+
+id(Test(name='toto')) == Test(name='toto')
+t1 = Test(name='toto')
+t2 = Test(name='toto')
+
+print id(t1) == id(t2)
+t1.name = 'tata'
+print t2.name