def add_items(self, key, items):
        self._reload_config_data()
        new_dict = copy.deepcopy(self._dict)
        if key not in new_dict:
            new_dict[key] = []
        if self.dedup:
            items = set(items)
            items = [item for item in items if item not in self._dict_set.get(key, set())]
        if not items:
            return True
        new_dict[key].extend(items)
        return self._update_config(new_dict)
Add items into the list for a given key
dataset/ETHPy150Open pinterest/kingpin/kingpin/manageddata/managed_datastructures.py/ManagedMappedList.add_items