1 files changed, 48 insertions, 36 deletions

diff --git a/examples/generic_associations/table_per_related.py b/examples/generic_associations/table_per_related.py
index 51c9f1b26..9c5e0e179 100644
--- a/examples/generic_associations/table_per_related.py
+++ b/examples/generic_associations/table_per_related.py
@@ -20,17 +20,21 @@ from sqlalchemy.ext.declarative import as_declarative, declared_attr
 from sqlalchemy import create_engine, Integer, Column, String, ForeignKey
 from sqlalchemy.orm import Session, relationship
 
+
 @as_declarative()
 class Base(object):
     """Base class which provides automated table name
     and surrogate primary key column.
 
     """
+
     @declared_attr
     def __tablename__(cls):
         return cls.__name__.lower()
+
     id = Column(Integer, primary_key=True)
 
+
 class Address(object):
     """Define columns that will be present in each
     'Address' table.
@@ -40,74 +44,82 @@ class Address(object):
     should be set up using @declared_attr.
 
     """
+
     street = Column(String)
     city = Column(String)
     zip = Column(String)
 
     def __repr__(self):
-        return "%s(street=%r, city=%r, zip=%r)" % \
-            (self.__class__.__name__, self.street,
-            self.city, self.zip)
+        return "%s(street=%r, city=%r, zip=%r)" % (
+            self.__class__.__name__,
+            self.street,
+            self.city,
+            self.zip,
+        )
+
 
 class HasAddresses(object):
     """HasAddresses mixin, creates a new Address class
     for each parent.
 
     """
+
     @declared_attr
     def addresses(cls):
         cls.Address = type(
             "%sAddress" % cls.__name__,
-            (Address, Base,),
+            (Address, Base),
             dict(
-                __tablename__="%s_address" %
-                            cls.__tablename__,
-                parent_id=Column(Integer,
-                            ForeignKey("%s.id" % cls.__tablename__)),
-                parent=relationship(cls)
-            )
+                __tablename__="%s_address" % cls.__tablename__,
+                parent_id=Column(
+                    Integer, ForeignKey("%s.id" % cls.__tablename__)
+                ),
+                parent=relationship(cls),
+            ),
         )
         return relationship(cls.Address)
 
+
 class Customer(HasAddresses, Base):
     name = Column(String)
 
+
 class Supplier(HasAddresses, Base):
     company_name = Column(String)
 
-engine = create_engine('sqlite://', echo=True)
+
+engine = create_engine("sqlite://", echo=True)
 Base.metadata.create_all(engine)
 
 session = Session(engine)
 
-session.add_all([
-    Customer(
-        name='customer 1',
-        addresses=[
-            Customer.Address(
-                    street='123 anywhere street',
-                    city="New York",
-                    zip="10110"),
-            Customer.Address(
-                    street='40 main street',
-                    city="San Francisco",
-                    zip="95732")
-        ]
-    ),
-    Supplier(
-        company_name="Ace Hammers",
-        addresses=[
-            Supplier.Address(
-                    street='2569 west elm',
-                    city="Detroit",
-                    zip="56785")
-        ]
-    ),
-])
+session.add_all(
+    [
+        Customer(
+            name="customer 1",
+            addresses=[
+                Customer.Address(
+                    street="123 anywhere street", city="New York", zip="10110"
+                ),
+                Customer.Address(
+                    street="40 main street", city="San Francisco", zip="95732"
+                ),
+            ],
+        ),
+        Supplier(
+            company_name="Ace Hammers",
+            addresses=[
+                Supplier.Address(
+                    street="2569 west elm", city="Detroit", zip="56785"
+                )
+            ],
+        ),
+    ]
+)
 
 session.commit()
 
 for customer in session.query(Customer):
     for address in customer.addresses:
         print(address)
-        print(address.parent)
\ No newline at end of file
+        print(address.parent)