在SQLAlchemy中从存储过程获取输出的问题

Question

我在SQLAlchemy + MSSQL中调用存储过程时遇到输出参数问题

这是我的代码：

engine = create_engine(app.conf['EPHYRE_CIS_URI'])
connection = engine.raw_connection()

payment_type_id = app.conf['CIS_FROM_WEB_PAYMENT_TYPE_ID']
cafe_id = app.conf['CIS_CAFE_FRANCH_ID']
account_id = app.conf['CIS_INTERNET_ACC_ID']
time_amount = 0
comment = u'Оплата на сайте'
payment_id = None #output

try:
    cursor = connection.cursor()
    result = cursor.callproc('Bas_CR_spPayment_Create', [client_id, payment_type_id, cafe_id,
                                                     account_id, payment_amount, time_amount,
                                                     comment, payment_id])
    print result
    cursor.close()
    connection.commit()
    print 'nice One! commited'
finally:
    connection.close()

所以，我得到这样的话：

[u'1275', u'135', u'7', u'1567', u'13.00', u'0', u'Оплата на сайте', none]

虽然sqlalchemy开发人员说，结果必须是改变数据的真实结果。

我做错了什么？ ：d