Replace Session class with session instance

The Session class was used instead of the session instance which resulted in an attribute error.

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/build/orm/tutorial.rst b/doc/build/orm/tutorial.rst
index f742151b0..9569e4b1f 100644
--- a/doc/build/orm/tutorial.rst
+++ b/doc/build/orm/tutorial.rst
@@ -1386,7 +1386,7 @@ is an important method at the center of usage for any SQL-fluent application.
     ON clause is a plain SQL expression.  To control the first entity in the list
     of JOINs, use the :meth:`.Query.select_from` method::
 
-        query = Session.query(User, Address).select_from(Address).join(User)
+        query = session.query(User, Address).select_from(Address).join(User)
 
 
 .. _ormtutorial_aliases: