Classe « MongoClient »

Méthode pymongo.MongoClient.start_session

Signature de la méthode start_session

def start_session(self, causal_consistency=None, default_transaction_options=None, snapshot=False) 

Description

start_session.__doc__

Start a logical session.

        This method takes the same parameters as
        :class:`~pymongo.client_session.SessionOptions`. See the
        :mod:`~pymongo.client_session` module for details and examples.

        Requires MongoDB 3.6. It is an error to call :meth:`start_session`
        if this client has been authenticated to multiple databases using the
        deprecated method :meth:`~pymongo.database.Database.authenticate`.

        A :class:`~pymongo.client_session.ClientSession` may only be used with
        the MongoClient that started it. :class:`ClientSession` instances are
        **not thread-safe or fork-safe**. They can only be used by one thread
        or process at a time. A single :class:`ClientSession` cannot be used
        to run multiple operations concurrently.

        :Returns:
          An instance of :class:`~pymongo.client_session.ClientSession`.

        .. versionadded:: 3.6