Returns the new values from the diff

def new_values(self):
        '''Returns the new values from the diff'''
        def get_new_values_and_key(item):
            values = item.new_values
            if item.past_dict:
                values.update({self._key: item.past_dict[self._key]})
            else:
                # This is a new item as it has no past_dict
                values.update({self._key: item.current_dict[self._key]})
            return values

        return [get_new_values_and_key(el)
                for el in self._get_recursive_difference('all')
                if el.diffs and el.current_dict]