def remove_overrides_in_list_and_dict_monitor (self):
        """
        Deletes all function definitions in list_observer and dict_observer.
        The net effect of this is that instances of these classes should
        behave like regular lists and dictionaries.
        """      
        import inspect 
        for klass in(list_observer, dict_observer):
            for attribute in dir(klass):
                try:
                    entity = getattr(klass, attribute)
                except AttributeError:
                    pass 
                else:
                    if inspect.isfunction(entity):
                        delattr(klass, attribute)
                        self.removed_functions.append(klass, attribute, entity)

        Deletes all function definitions in list_observer and dict_observer.
        The net effect of this is that instances of these classes should
        behave like regular lists and dictionaries.
        
recipes/Python/306866_A_basic_undo_mechanism/recipe-306866.py