def iter_instances(self):
for wrkey in set(self.keys()):<EOL><INDENT>obj = self.get(wrkey)<EOL>if obj is None:<EOL><INDENT>continue<EOL><DEDENT>yield wrkey, obj<EOL><DEDENT>
Iterate over the stored objects

        Yields:
            wrkey: The two-tuple key used to store the object
            obj: The instance or function object