如何向TxMongo库传递正确的数据库名称

from twisted.internet import defer
from txmongo.connection import ConnectionPool

pool = ConnectionPool(host='localhost', port=27017, pool_size=10)

@defer.inlineCallbacks
def get_database():
    connection = yield pool.connection()
    database = connection.my_database_name
    defer.returnValue(database)

@defer.inlineCallbacks
def use_database():
    database = yield get_database()
    collection = database.my_collection_name
    result = yield collection.find_one()
    print(result)