SQLAlchemy с косой чертой pymssql в имени сервера

В настоящее время я пытаюсь настроить мою строку подключения для SQLAlchemy на MSSQL. Из моего тестирования это работает:

engine = create_engine("mssql+pymssql://username:password@dviserver\dev0000/db").connect()

Однако, как мне ввести номер порта в эту строку подключения, я пробовал следующее, и это не работает:

engine = create_engine("mssql+pymssql://username:password@dviserver\dev0000:1433/db").connect()

Ниже приведена трассировка стека:

Traceback (most recent call last):
  File "src\pymssql.pyx", line 636, in pymssql.connect
  File "src\_mssql.pyx", line 1957, in _mssql.connect
  File "src\_mssql.pyx", line 677, in _mssql.MSSQLConnection.__init__
_mssql.MSSQLDriverException: Connection to the database failed for an unknown reason.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\engine\base.py", line 2158, in _wrap_pool_connect
    return fn()
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\pool.py", line 342, in unique_connection
    return _ConnectionFairy._checkout(self)
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\pool.py", line 788, in _checkout
    fairy = _ConnectionRecord.checkout(pool)
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\pool.py", line 529, in checkout
    rec = pool._do_get()
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\pool.py", line 1193, in _do_get
    self._dec_overflow()
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\util\langhelpers.py", line 66, in __exit__
    compat.reraise(exc_type, exc_value, exc_tb)
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\util\compat.py", line 249, in reraise
    raise value
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\pool.py", line 1190, in _do_get
    return self._create_connection()
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\pool.py", line 347, in _create_connection
    return _ConnectionRecord(self)
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\pool.py", line 474, in __init__
    self.__connect(first_connect_check=True)
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\pool.py", line 671, in __connect
    connection = pool._invoke_creator(self)
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\engine\strategies.py", line 106, in connect
    return dialect.connect(*cargs, **cparams)
  File "C:\conda\publisher-app\lib\site-packages\sqlalchemy\engine\default.py", line 412, in connect
    return self.dbapi.connect(*cargs, **cparams)
  File "src\pymssql.pyx", line 645, in pymssql.connect
pymssql.InterfaceError: Connection to the database failed for an unknown reason.