Outside of the admin APIs, all work with actual table data in a database occurs in the context of a session.

To create a :class:`~google.cloud.spanner.session.Session` object:

session = database.session()

After creating the session object, use its :meth:`~google.cloud.spanner.session.Session.create` method to trigger its creation on the server:

session.create()

After creating the session object, use its :meth:`~google.cloud.spanner.session.Session.exists` method to determine whether the session still exists on the server:

assert session.exists()

Once done with the session object, use its :meth:`~google.cloud.spanner.session.Session.delete` method to free up its resources on the server:

session.delete()

Rather than calling the Session's :meth:`~google.cloud.spanner.session.Session.create` and :meth:`~google.cloud.spanner.session.Session.delete` methods directly, you can use the session as a Python context manager:

with database.session() as session:

    assert session.exists()
    # perform session operations here

Next, learn about :doc:`spanner-session-implicit-txn-usage`.