如何从sqlalchemy中删除查询结果的括号

我知道这件事很简单,但我不记得该怎么做。

基本上,我想要从函数返回的结果 select_data 成为

['something','something_a','something_b']

[(u'something',), (u'something_a',)(u'something_b',)]

下面是我正在使用的代码块:

import sqlalchemy
from sqlalchemy import Table, exc, and_
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

from configurations import config_loader

hostname = config_loader.get('db_config', 'hostname')
db_name = config_loader.get('db_config', 'db_name')
db_port = config_loader.get('db_config', 'db_port')
login = config_loader.get('db_config', 'db_login')
pwd = config_loader.get('db_config', 'db_pwd')
sample_table = config_loader.get('db_tables', 'some_table')


con_string = 'mysql+mysqlconnector://{login}:{passwd}@{hostname}:{port}/{db}'

engine_str = con_string.format(
    login=login, passwd=pwd, hostname=hostname, port=db_port, db=db_name
)

try:
    engine = sqlalchemy.create_engine(engine_str, echo=False)
    session = sessionmaker(bind=engine)
    connection = engine.connect()
    session = session(bind=connection)
    Base = declarative_base()
except exc.SQLAlchemyError:
    raise


def select_data(server):
    t = Table(some_table, Base.metadata, autoload_with=engine)
    stm = session.query(t.c.data_name).filter(
        t.c.server == server
    )
    return stm.all()