gistfile1.py

                victimsToPrune = []
                while len(victimsToPrune) < 10 and suggestedDeletions:
                    victimsToPrune.append(suggestedDeletions.pop())
                for victim in victimsToPrune:
                    d.addCallback(lambda ign: debug(victim, msg='start'))
                    d.addCallback(lambda ign:
                            self._snapshotManipulator.prune(victim.key, local_forest))