human
Solve the following python programming problem given the following code:
@ classmethod 
def AllocateAssetIds(cls, client, user_id, num_ids, callback) : 
    "Allocates 'num_ids' new ids from the 'asset_id_seq' column in a
    block for the specified user id and returns the first id in the
    sequence (first_id, ..., first_id + num_ids] with the callback
    " 
    id_seq_key = cls._table.GetColumn ('asset_id_seq').key 
    def _OnUpdateIdSeq(result) : 
        last_id = result.return_values [id_seq_key] 
        first_id = (last_id - num_ids) 
        callback (first_id) 
client.UpdateItem (table = cls._table.name, key = db_client.DBKey (hash_key = user_id, range_key = None), attributes = { 
        id_seq_key : db_client.UpdateAttr (value = num_ids, action = 'ADD'), 
}, return_values = 'UPDATED_NEW', callback = cls) 

    
    

    Fix the buggy line: }, return_values = 'UPDATED_NEW', callback = cls)
assistant
#Here is Python code to fix the buggy line: }, return_values = 'UPDATED_NEW', callback = cls)
.

}, return_values = 'UPDATED_NEW', callback = def _OnUpdateIdSeq()