- fix long lines in test_attributes

- add deprecation warning to get_history() when passed
True or False, convert
- rearrange symbol() so we can get sphinx autodata to work

diff --git a/CHANGES b/CHANGES
index 8dfc8fd01cdad2b2fc1136bcad6fb11870834ac6..f8fc77c3722b1df4fd31baa19bb44d0b4af6bca1 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -131,6 +131,11 @@ CHANGES
     retrieving the information the flush needs in order
     to not miss anything.  [ticket:2049]
 
+  - the value of "passive" as passed to 
+    attributes.get_history() should be one of the 
+    constants defined in the attributes package.  Sending 
+    True or False is deprecated.
+
 - sql
   - Added over() function, method to FunctionElement
     classes, produces the _Over() construct which 

diff --git a/doc/build/orm/examples.rst b/doc/build/orm/examples.rst
index 00b18bc7b87a5aab6db14729ff31a740adcbe650..a9bcf56cc7b94dd609d0e2734cf813e3d9aa85e9 100644 (file)
--- a/doc/build/orm/examples.rst
+++ b/doc/build/orm/examples.rst
@@ -42,13 +42,6 @@ Location: /examples/beaker_caching/
 
 .. automodule:: beaker_caching
 
-Derived Attributes
-------------------
-
-Location: /examples/derived_attributes/
-
-.. automodule:: derived_attributes
-
 
 Directed Graphs
 ---------------

diff --git a/doc/build/orm/session.rst b/doc/build/orm/session.rst
index 7e0c8bb83b62c7cbf5729791a968840480733ced..31157e0f77bd46da1764a5ff550db5c0aa3a67d0 100644 (file)
--- a/doc/build/orm/session.rst
+++ b/doc/build/orm/session.rst
@@ -1491,18 +1491,14 @@ those described in :ref:`events_orm_toplevel`.
 .. autoclass:: History
     :members:
 
-.. attribute:: sqlalchemy.orm.attributes.PASSIVE_NO_INITIALIZE
+.. autodata:: PASSIVE_NO_INITIALIZE
 
-   Symbol indicating that loader callables should
-   not be fired off, and a non-initialized attribute 
-   should remain that way.
+.. autodata:: PASSIVE_NO_FETCH
 
-.. attribute:: sqlalchemy.orm.attributes.PASSIVE_NO_FETCH
+.. autodata:: PASSIVE_NO_FETCH_RELATED
 
-   Symbol indicating that loader callables should not boe fired off.
-   Non-initialized attributes should be initialized to an empty value.
+.. autodata:: PASSIVE_ONLY_PERSISTENT
 
-.. attribute:: sqlalchemy.orm.attributes.PASSIVE_OFF
+.. autodata:: PASSIVE_OFF
 
-    Symbol indicating that loader callables should be executed.
 

diff --git a/lib/sqlalchemy/orm/attributes.py b/lib/sqlalchemy/orm/attributes.py
index 6ee5cbffeb2e573795f41b836d9c524b0b820a0f..e7b04c4af645bda86fd7949bb03146a6ed3497bb 100644 (file)
--- a/lib/sqlalchemy/orm/attributes.py
+++ b/lib/sqlalchemy/orm/attributes.py
@@ -28,34 +28,48 @@ ATTR_EMPTY = util.symbol('ATTR_EMPTY')
 NO_VALUE = util.symbol('NO_VALUE')
 NEVER_SET = util.symbol('NEVER_SET')
 
-PASSIVE_NO_INITIALIZE = util.symbol('PASSIVE_NO_INITIALIZE')
+
+PASSIVE_NO_INITIALIZE = util.symbol('PASSIVE_NO_INITIALIZE',
 """Symbol indicating that loader callables should
    not be fired off, and a non-initialized attribute 
-   should remain that way."""
+   should remain that way.
+""")
 
-PASSIVE_NO_FETCH = util.symbol('PASSIVE_NO_FETCH')
-"""Symbol indicating that loader callables should not emit SQL.
-   Non-initialized attributes should be initialized to an empty value."""
+PASSIVE_NO_FETCH = util.symbol('PASSIVE_NO_FETCH',
+"""Symbol indicating that loader callables should not emit SQL, 
+   but a value can be fetched from the current session.
+   
+   Non-initialized attributes should be initialized to an empty value.
 
-PASSIVE_NO_FETCH_RELATED = util.symbol('PASSIVE_NO_FETCH_RELATED')
+""")
+
+PASSIVE_NO_FETCH_RELATED = util.symbol('PASSIVE_NO_FETCH_RELATED',
 """Symbol indicating that loader callables should not emit SQL for
-   the related object, but can refresh the attributes of the local
-   instance.
+   loading a related object, but can refresh the attributes of the local
+   instance in order to locate a related object in the current session.
+   
    Non-initialized attributes should be initialized to an empty value.
    
    The unit of work uses this mode to check if history is present
-   with minimal SQL emitted.
-   """
+   on many-to-one attributes with minimal SQL emitted.
 
-PASSIVE_ONLY_PERSISTENT = util.symbol('PASSIVE_ONLY_PERSISTENT')
+""")
+
+PASSIVE_ONLY_PERSISTENT = util.symbol('PASSIVE_ONLY_PERSISTENT',
 """Symbol indicating that loader callables should only fire off for
-persistent objects.
+   parent objects which are persistent (i.e., have a database
+   identity).
 
-Loads of "previous" values during change events use this flag.
-"""
+   Load operations for the "previous" value of an attribute make
+   use of this flag during change events.
+
+""")
 
-PASSIVE_OFF = util.symbol('PASSIVE_OFF')
-"""Symbol indicating that loader callables should be executed."""
+PASSIVE_OFF = util.symbol('PASSIVE_OFF',
+"""Symbol indicating that loader callables should be executed
+   normally.
+
+""")
 
 
 class QueryableAttribute(interfaces.PropComparator):
@@ -1107,11 +1121,20 @@ def get_history(obj, key, passive=PASSIVE_OFF):
     :param key: string attribute name.
 
     :param passive: indicates if the attribute should be
-      loaded from the database if not already present (:attr:`PASSIVE_NO_FETCH`), and
+      loaded from the database if not already present (:attr:`.PASSIVE_NO_FETCH`), and
       if the attribute should be not initialized to a blank value otherwise
-      (:attr:`PASSIVE_NO_INITIALIZE`). Default is :attr:`PASSIVE_OFF`.
+      (:attr:`.PASSIVE_NO_INITIALIZE`). Default is :attr:`PASSIVE_OFF`.
 
     """
+    if passive is True:
+        util.warn_deprecated("Passing True for 'passive' is deprecated. "
+                                "Use attributes.PASSIVE_NO_INITIALIZE")
+        passive = PASSIVE_NO_INITIALIZE
+    elif passive is False:
+        util.warn_deprecated("Passing False for 'passive' is "
+                                "deprecated.  Use attributes.PASSIVE_OFF")
+        passive = PASSIVE_OFF
+
     return get_state_history(instance_state(obj), key, passive)
 
 def get_state_history(state, key, passive=PASSIVE_OFF):

diff --git a/lib/sqlalchemy/util/langhelpers.py b/lib/sqlalchemy/util/langhelpers.py
index d723a18695a83cc8ff71f940476fd23ec910044d..4088e85cb4a9dbcdfea2012e7d2971b4e041a12c 100644 (file)
--- a/lib/sqlalchemy/util/langhelpers.py
+++ b/lib/sqlalchemy/util/langhelpers.py
@@ -657,10 +657,12 @@ class classproperty(property):
 
 
 class _symbol(object):
-    def __init__(self, name):
+    def __init__(self, name, doc=None):
         """Construct a new named symbol."""
         assert isinstance(name, str)
         self.name = name
+        if doc:
+            self.__doc__ = doc
     def __reduce__(self):
         return symbol, (self.name,)
     def __repr__(self):
@@ -682,16 +684,23 @@ class symbol(object):
 
     Repeated calls of symbol('name') will all return the same instance.
 
+    The optional ``doc`` argument assigns to ``__doc__``.  This
+    is strictly so that Sphinx autoattr picks up the docstring we want
+    (it doesn't appear to pick up the in-module docstring if the datamember
+    is in a different module - autoattribute also blows up completely).
+    If Sphinx fixes/improves this then we would no longer need 
+    ``doc`` here.
+    
     """
     symbols = {}
     _lock = threading.Lock()
 
-    def __new__(cls, name):
+    def __new__(cls, name, doc=None):
         cls._lock.acquire()
         try:
             sym = cls.symbols.get(name)
             if sym is None:
-                cls.symbols[name] = sym = _symbol(name)
+                cls.symbols[name] = sym = _symbol(name, doc)
             return sym
         finally:
             symbol._lock.release()

diff --git a/test/orm/test_attributes.py b/test/orm/test_attributes.py
index 52a06d150465506e760963e3ac48ef596e77b7dc..7d3793abda1ab4f68c11758f5e80c16d2f56dded 100644 (file)
--- a/test/orm/test_attributes.py
+++ b/test/orm/test_attributes.py
@@ -4,7 +4,8 @@ from sqlalchemy.orm.collections import collection
 from sqlalchemy.orm.interfaces import AttributeExtension
 from sqlalchemy import exc as sa_exc
 from test.lib import *
-from test.lib.testing import eq_, ne_, assert_raises, assert_raises_message
+from test.lib.testing import eq_, ne_, assert_raises, \
+    assert_raises_message
 from test.orm import _base
 from test.lib.util import gc_collect, all_partial_orderings
 from sqlalchemy.util import cmp, jython, topological
@@ -26,25 +27,29 @@ class AttributesTest(_base.ORMTest):
         MyTest, MyTest2 = None, None
 
     def test_basic(self):
-        class User(object):pass
+        class User(object):
+            pass
 
         instrumentation.register_class(User)
-        attributes.register_attribute(User, 'user_id', uselist=False, useobject=False)
-        attributes.register_attribute(User, 'user_name', uselist=False, useobject=False)
-        attributes.register_attribute(User, 'email_address', uselist=False, useobject=False)
-
+        attributes.register_attribute(User, 'user_id', uselist=False,
+                useobject=False)
+        attributes.register_attribute(User, 'user_name', uselist=False,
+                useobject=False)
+        attributes.register_attribute(User, 'email_address',
+                uselist=False, useobject=False)
         u = User()
         u.user_id = 7
         u.user_name = 'john'
         u.email_address = 'lala@123.com'
-
-        self.assert_(u.user_id == 7 and u.user_name == 'john' and u.email_address == 'lala@123.com')
+        self.assert_(u.user_id == 7 and u.user_name == 'john'
+                     and u.email_address == 'lala@123.com')
         attributes.instance_state(u).commit_all(attributes.instance_dict(u))
-        self.assert_(u.user_id == 7 and u.user_name == 'john' and u.email_address == 'lala@123.com')
-
+        self.assert_(u.user_id == 7 and u.user_name == 'john'
+                     and u.email_address == 'lala@123.com')
         u.user_name = 'heythere'
         u.email_address = 'foo@bar.com'
-        self.assert_(u.user_id == 7 and u.user_name == 'heythere' and u.email_address == 'foo@bar.com')
+        self.assert_(u.user_id == 7 and u.user_name == 'heythere'
+                     and u.email_address == 'foo@bar.com')
 
     def test_pickleness(self):
         instrumentation.register_class(MyTest)
@@ -124,7 +129,8 @@ class AttributesTest(_base.ORMTest):
         self.assert_(o4.mt2[0].b is None)
 
     def test_state_gc(self):
-        """test that InstanceState always has a dict, even after host object gc'ed."""
+        """test that InstanceState always has a dict, even after host
+        object gc'ed."""
 
         class Foo(object):
             pass
@@ -177,29 +183,29 @@ class AttributesTest(_base.ORMTest):
         attributes.register_attribute(Foo, 'b', uselist=False, useobject=False)
 
         f = Foo()
-        attributes.instance_state(f).expire(attributes.instance_dict(f), set())
-        eq_(f.a, "this is a")
+        attributes.instance_state(f).expire(attributes.instance_dict(f),
+                set())
+        eq_(f.a, 'this is a')
         eq_(f.b, 12)
-
-        f.a = "this is some new a"
-        attributes.instance_state(f).expire(attributes.instance_dict(f), set())
-        eq_(f.a, "this is a")
+        f.a = 'this is some new a'
+        attributes.instance_state(f).expire(attributes.instance_dict(f),
+                set())
+        eq_(f.a, 'this is a')
         eq_(f.b, 12)
-
-        attributes.instance_state(f).expire(attributes.instance_dict(f), set())
-        f.a = "this is another new a"
-        eq_(f.a, "this is another new a")
+        attributes.instance_state(f).expire(attributes.instance_dict(f),
+                set())
+        f.a = 'this is another new a'
+        eq_(f.a, 'this is another new a')
         eq_(f.b, 12)
-
-        attributes.instance_state(f).expire(attributes.instance_dict(f), set())
-        eq_(f.a, "this is a")
+        attributes.instance_state(f).expire(attributes.instance_dict(f),
+                set())
+        eq_(f.a, 'this is a')
         eq_(f.b, 12)
-
         del f.a
         eq_(f.a, None)
         eq_(f.b, 12)
-
-        attributes.instance_state(f).commit_all(attributes.instance_dict(f), set())
+        attributes.instance_state(f).commit_all(attributes.instance_dict(f),
+                set())
         eq_(f.a, None)
         eq_(f.b, 12)
 
@@ -230,11 +236,16 @@ class AttributesTest(_base.ORMTest):
 
         instrumentation.register_class(User)
         instrumentation.register_class(Address)
-        attributes.register_attribute(User, 'user_id', uselist=False, useobject=False)
-        attributes.register_attribute(User, 'user_name', uselist=False, useobject=False)
-        attributes.register_attribute(User, 'addresses', uselist = True, useobject=True)
-        attributes.register_attribute(Address, 'address_id', uselist=False, useobject=False)
-        attributes.register_attribute(Address, 'email_address', uselist=False, useobject=False)
+        attributes.register_attribute(User, 'user_id', uselist=False,
+                useobject=False)
+        attributes.register_attribute(User, 'user_name', uselist=False,
+                useobject=False)
+        attributes.register_attribute(User, 'addresses', uselist=True,
+                useobject=True)
+        attributes.register_attribute(Address, 'address_id',
+                uselist=False, useobject=False)
+        attributes.register_attribute(Address, 'email_address',
+                uselist=False, useobject=False)
 
         u = User()
         u.user_id = 7
@@ -245,16 +256,23 @@ class AttributesTest(_base.ORMTest):
         a.email_address = 'lala@123.com'
         u.addresses.append(a)
 
-        self.assert_(u.user_id == 7 and u.user_name == 'john' and u.addresses[0].email_address == 'lala@123.com')
-        u, attributes.instance_state(a).commit_all(attributes.instance_dict(a))
-        self.assert_(u.user_id == 7 and u.user_name == 'john' and u.addresses[0].email_address == 'lala@123.com')
+        self.assert_(u.user_id == 7 and u.user_name == 'john'
+                     and u.addresses[0].email_address == 'lala@123.com')
+        (u,
+         attributes.instance_state(a).commit_all(attributes.instance_dict(a)))
+        self.assert_(u.user_id == 7 and u.user_name == 'john'
+                     and u.addresses[0].email_address == 'lala@123.com')
 
         u.user_name = 'heythere'
         a = Address()
         a.address_id = 11
         a.email_address = 'foo@bar.com'
         u.addresses.append(a)
-        self.assert_(u.user_id == 7 and u.user_name == 'heythere' and u.addresses[0].email_address == 'lala@123.com' and u.addresses[1].email_address == 'foo@bar.com')
+
+        eq_(u.user_id, 7)
+        eq_(u.user_name, 'heythere')
+        eq_(u.addresses[0].email_address,'lala@123.com')
+        eq_(u.addresses[1].email_address,'foo@bar.com')
 
     def test_extension_commit_attr(self):
         """test that an extension which commits attribute history
@@ -324,7 +342,8 @@ class AttributesTest(_base.ORMTest):
             def hist(key, shouldmatch, fn, *arg):
                 attributes.instance_state(f1).commit_all(attributes.instance_dict(f1))
                 fn(*arg)
-                histories.append((shouldmatch, attributes.get_history(f1, key)))
+                histories.append((shouldmatch,
+                                 attributes.get_history(f1, key)))
 
             f1 = Foo()
             hist('bars', True, f1.bars.append, b3)
@@ -393,14 +412,19 @@ class AttributesTest(_base.ORMTest):
         x.bars
         b = Bar(id=4)
         b.foos.append(x)
-        attributes.instance_state(x).expire_attributes(attributes.instance_dict(x), ['bars'])
+        attributes.instance_state(x).expire_attributes(attributes.instance_dict(x),
+                ['bars'])
         assert_raises(AssertionError, b.foos.remove, x)
 
 
     def test_scalar_listener(self):
-        # listeners on ScalarAttributeImpl and MutableScalarAttributeImpl aren't used normally.
-        # test that they work for the benefit of user extensions
+
+        # listeners on ScalarAttributeImpl and
+        # MutableScalarAttributeImpl aren't used normally. test that
+        # they work for the benefit of user extensions
+
         class Foo(object):
+
             pass
 
         results = []
@@ -416,8 +440,12 @@ class AttributesTest(_base.ORMTest):
                 return child
 
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'x', uselist=False, mutable_scalars=False, useobject=False, extension=ReceiveEvents())
-        attributes.register_attribute(Foo, 'y', uselist=False, mutable_scalars=True, useobject=False, copy_function=lambda x:x, extension=ReceiveEvents())
+        attributes.register_attribute(Foo, 'x', uselist=False,
+                mutable_scalars=False, useobject=False,
+                extension=ReceiveEvents())
+        attributes.register_attribute(Foo, 'y', uselist=False,
+                mutable_scalars=True, useobject=False,
+                copy_function=lambda x: x, extension=ReceiveEvents())
 
         f = Foo()
         f.x = 5
@@ -529,24 +557,32 @@ class AttributesTest(_base.ORMTest):
 
 
     def test_inheritance2(self):
-        """test that the attribute manager can properly traverse the managed attributes of an object,
-        if the object is of a descendant class with managed attributes in the parent class"""
-        class Foo(object):pass
-        class Bar(Foo):pass
+        """test that the attribute manager can properly traverse the
+        managed attributes of an object, if the object is of a
+        descendant class with managed attributes in the parent class"""
+
+        class Foo(object):
+            pass
+
+        class Bar(Foo):
+            pass
 
         class Element(object):
             _state = True
 
         instrumentation.register_class(Foo)
         instrumentation.register_class(Bar)
-        attributes.register_attribute(Foo, 'element', uselist=False, useobject=True)
+        attributes.register_attribute(Foo, 'element', uselist=False,
+                useobject=True)
         el = Element()
         x = Bar()
         x.element = el
-        eq_(attributes.get_state_history(attributes.instance_state(x), 'element'), ([el], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(x),
+            'element'), ([el], (), ()))
         attributes.instance_state(x).commit_all(attributes.instance_dict(x))
-
-        (added, unchanged, deleted) = attributes.get_state_history(attributes.instance_state(x), 'element')
+        added, unchanged, deleted = \
+            attributes.get_state_history(attributes.instance_state(x),
+                'element')
         assert added == ()
         assert unchanged == [el]
 
@@ -560,10 +596,12 @@ class AttributesTest(_base.ORMTest):
 
         instrumentation.register_class(Foo)
         instrumentation.register_class(Bar)
+        bar1, bar2, bar3, bar4 = [Bar(id=1), Bar(id=2), Bar(id=3),
+                                  Bar(id=4)]
 
-        bar1, bar2, bar3, bar4 = [Bar(id=1), Bar(id=2), Bar(id=3), Bar(id=4)]
         def func1(state, passive):
-            return "this is func 1"
+            return 'this is func 1'
+
         def func2(state, passive):
             return [bar1, bar2, bar3]
 
@@ -573,39 +611,41 @@ class AttributesTest(_base.ORMTest):
                 callable_=func2, useobject=True)
         attributes.register_attribute(Bar, 'id', uselist=False,
                 useobject=True)
-
         x = Foo()
         attributes.instance_state(x).commit_all(attributes.instance_dict(x))
         x.col2.append(bar4)
-        eq_(attributes.get_state_history(attributes.instance_state(x), 'col2'), ([bar4], [bar1, bar2, bar3], []))
+        eq_(attributes.get_state_history(attributes.instance_state(x),
+            'col2'), ([bar4], [bar1, bar2, bar3], []))
 
     def test_parenttrack(self):
-        class Foo(object):pass
-        class Bar(object):pass
+        class Foo(object):
+            pass
+
+        class Bar(object):
+            pass
 
         instrumentation.register_class(Foo)
         instrumentation.register_class(Bar)
-
-        attributes.register_attribute(Foo, 'element', uselist=False, trackparent=True, useobject=True)
-        attributes.register_attribute(Bar, 'element', uselist=False, trackparent=True, useobject=True)
-
+        attributes.register_attribute(Foo, 'element', uselist=False,
+                trackparent=True, useobject=True)
+        attributes.register_attribute(Bar, 'element', uselist=False,
+                trackparent=True, useobject=True)
         f1 = Foo()
         f2 = Foo()
         b1 = Bar()
         b2 = Bar()
-
         f1.element = b1
         b2.element = f2
-
         assert attributes.has_parent(Foo, b1, 'element')
         assert not attributes.has_parent(Foo, b2, 'element')
         assert not attributes.has_parent(Foo, f2, 'element')
         assert attributes.has_parent(Bar, f2, 'element')
-
         b2.element = None
         assert not attributes.has_parent(Bar, f2, 'element')
 
-        # test that double assignment doesn't accidentally reset the 'parent' flag.
+        # test that double assignment doesn't accidentally reset the
+        # 'parent' flag.
+
         b3 = Bar()
         f4 = Foo()
         b3.element = f4
@@ -615,20 +655,23 @@ class AttributesTest(_base.ORMTest):
 
     def test_mutablescalars(self):
         """test detection of changes on mutable scalar items"""
-        class Foo(object):pass
+
+        class Foo(object):
+            pass
 
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'element', uselist=False, copy_function=lambda x:[y for y in x], mutable_scalars=True, useobject=False)
+        attributes.register_attribute(Foo, 'element', uselist=False,
+                copy_function=lambda x: [y for y in x],
+                mutable_scalars=True, useobject=False)
         x = Foo()
         x.element = ['one', 'two', 'three']
         attributes.instance_state(x).commit_all(attributes.instance_dict(x))
         x.element[1] = 'five'
         assert attributes.instance_state(x).modified
-
         instrumentation.unregister_class(Foo)
-
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'element', uselist=False, useobject=False)
+        attributes.register_attribute(Foo, 'element', uselist=False,
+                useobject=False)
         x = Foo()
         x.element = ['one', 'two', 'three']
         attributes.instance_state(x).commit_all(attributes.instance_dict(x))
@@ -636,12 +679,13 @@ class AttributesTest(_base.ORMTest):
         assert not attributes.instance_state(x).modified
 
     def test_descriptorattributes(self):
-        """changeset: 1633 broke ability to use ORM to map classes with unusual
-        descriptor attributes (for example, classes that inherit from ones
-        implementing zope.interface.Interface).
-        This is a simple regression test to prevent that defect.
-        """
+        """changeset: 1633 broke ability to use ORM to map classes with
+        unusual descriptor attributes (for example, classes that inherit
+        from ones implementing zope.interface.Interface). This is a
+        simple regression test to prevent that defect. """
+
         class des(object):
+
             def __get__(self, instance, owner):
                 raise AttributeError('fake attribute')
 
@@ -653,52 +697,70 @@ class AttributesTest(_base.ORMTest):
 
     def test_collectionclasses(self):
 
-        class Foo(object):pass
-        instrumentation.register_class(Foo)
+        class Foo(object):
+            pass
 
-        attributes.register_attribute(Foo, "collection", uselist=True, typecallable=set, useobject=True)
-        assert attributes.manager_of_class(Foo).is_instrumented("collection")
+        instrumentation.register_class(Foo)
+        attributes.register_attribute(Foo, 'collection', uselist=True,
+                typecallable=set, useobject=True)
+        assert attributes.manager_of_class(Foo).is_instrumented('collection'
+                )
         assert isinstance(Foo().collection, set)
-
-        attributes.unregister_attribute(Foo, "collection")
-        assert not attributes.manager_of_class(Foo).is_instrumented("collection")
-
+        attributes.unregister_attribute(Foo, 'collection')
+        assert not attributes.manager_of_class(Foo).is_instrumented('collection'
+                )
         try:
-            attributes.register_attribute(Foo, "collection", uselist=True, typecallable=dict, useobject=True)
+            attributes.register_attribute(Foo, 'collection',
+                    uselist=True, typecallable=dict, useobject=True)
             assert False
         except sa_exc.ArgumentError, e:
-            assert str(e) == "Type InstrumentedDict must elect an appender method to be a collection class"
+            assert str(e) \
+                == 'Type InstrumentedDict must elect an appender '\
+                'method to be a collection class'
 
         class MyDict(dict):
+
             @collection.appender
             def append(self, item):
                 self[item.foo] = item
+
             @collection.remover
             def remove(self, item):
                 del self[item.foo]
-        attributes.register_attribute(Foo, "collection", uselist=True, typecallable=MyDict, useobject=True)
+
+        attributes.register_attribute(Foo, 'collection', uselist=True,
+                typecallable=MyDict, useobject=True)
         assert isinstance(Foo().collection, MyDict)
+        attributes.unregister_attribute(Foo, 'collection')
 
-        attributes.unregister_attribute(Foo, "collection")
+        class MyColl(object):
+            pass
 
-        class MyColl(object):pass
         try:
-            attributes.register_attribute(Foo, "collection", uselist=True, typecallable=MyColl, useobject=True)
+            attributes.register_attribute(Foo, 'collection',
+                    uselist=True, typecallable=MyColl, useobject=True)
             assert False
         except sa_exc.ArgumentError, e:
-            assert str(e) == "Type MyColl must elect an appender method to be a collection class"
+            assert str(e) \
+                == 'Type MyColl must elect an appender method to be a '\
+                'collection class'
 
         class MyColl(object):
+
             @collection.iterator
             def __iter__(self):
                 return iter([])
+
             @collection.appender
             def append(self, item):
                 pass
+
             @collection.remover
             def remove(self, item):
                 pass
-        attributes.register_attribute(Foo, "collection", uselist=True, typecallable=MyColl, useobject=True)
+
+        attributes.register_attribute(Foo, 'collection', uselist=True,
+                typecallable=MyColl, useobject=True)
         try:
             Foo().collection
             assert True
@@ -1035,79 +1097,98 @@ class HistoryTest(_base.ORMTest):
             pass
 
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'someattr', uselist=False, useobject=False)
-
+        attributes.register_attribute(Foo, 'someattr', uselist=False,
+                useobject=False)
         f = Foo()
-        eq_(Foo.someattr.impl.get_committed_value(attributes.instance_state(f), attributes.instance_dict(f)), None)
-
+        eq_(Foo.someattr.impl.get_committed_value(attributes.instance_state(f),
+            attributes.instance_dict(f)), None)
         f.someattr = 3
-        eq_(Foo.someattr.impl.get_committed_value(attributes.instance_state(f), attributes.instance_dict(f)), None)
-
+        eq_(Foo.someattr.impl.get_committed_value(attributes.instance_state(f),
+            attributes.instance_dict(f)), None)
         f = Foo()
         f.someattr = 3
-        eq_(Foo.someattr.impl.get_committed_value(attributes.instance_state(f), attributes.instance_dict(f)), None)
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(Foo.someattr.impl.get_committed_value(attributes.instance_state(f), attributes.instance_dict(f)), 3)
+        eq_(Foo.someattr.impl.get_committed_value(attributes.instance_state(f),
+            attributes.instance_dict(f)), None)
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(Foo.someattr.impl.get_committed_value(attributes.instance_state(f),
+            attributes.instance_dict(f)), 3)
 
     def test_scalar(self):
         class Foo(_base.BasicEntity):
             pass
 
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'someattr', uselist=False, useobject=False)
+        attributes.register_attribute(Foo, 'someattr', uselist=False,
+                useobject=False)
 
         # case 1.  new object
-        f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), (), ()))
-
-        f.someattr = "hi"
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), (['hi'], (), ()))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), ['hi'], ()))
 
+        f = Foo()
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), (), ()))
+        f.someattr = 'hi'
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), (['hi'], (), ()))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), ['hi'], ()))
         f.someattr = 'there'
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), (['there'], (), ['hi']))
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), ['there'], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), (['there'], (), ['hi']))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), ['there'], ()))
         del f.someattr
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), (), ['there']))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), (), ['there']))
+
+        # case 2.  object with direct dictionary settings (similar to a
+        # load operation)
 
-        # case 2.  object with direct dictionary settings (similar to a load operation)
         f = Foo()
         f.__dict__['someattr'] = 'new'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), ['new'], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), ['new'], ()))
         f.someattr = 'old'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), (['old'], (), ['new']))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), (['old'], (), ['new']))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), ['old'], ()))
 
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), ['old'], ()))
+        # setting None on uninitialized is currently a change for a
+        # scalar attribute no lazyload occurs so this allows overwrite
+        # operation to proceed
 
-        # setting None on uninitialized is currently a change for a scalar attribute
-        # no lazyload occurs so this allows overwrite operation to proceed
         f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), (), ()))
         f.someattr = None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([None], (), ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([None], (), ()))
         f = Foo()
         f.__dict__['someattr'] = 'new'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), ['new'], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), ['new'], ()))
         f.someattr = None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([None], (), ['new']))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([None], (), ['new']))
 
         # set same value twice
+
         f = Foo()
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
         f.someattr = 'one'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), (['one'], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), (['one'], (), ()))
         f.someattr = 'two'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), (['two'], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), (['two'], (), ()))
 
 
     def test_mutable_scalar(self):
@@ -1115,71 +1196,84 @@ class HistoryTest(_base.ORMTest):
             pass
 
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'someattr', uselist=False, useobject=False, mutable_scalars=True, copy_function=dict)
+        attributes.register_attribute(Foo, 'someattr', uselist=False,
+                useobject=False, mutable_scalars=True,
+                copy_function=dict)
 
         # case 1.  new object
-        f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), (), ()))
-
-        f.someattr = {'foo':'hi'}
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([{'foo':'hi'}], (), ()))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [{'foo':'hi'}], ()))
-        eq_(attributes.instance_state(f).committed_state['someattr'], {'foo':'hi'})
 
+        f = Foo()
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), (), ()))
+        f.someattr = {'foo': 'hi'}
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([{'foo': 'hi'}], (), ()))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [{'foo': 'hi'}], ()))
+        eq_(attributes.instance_state(f).committed_state['someattr'],
+            {'foo': 'hi'})
         f.someattr['foo'] = 'there'
-        eq_(attributes.instance_state(f).committed_state['someattr'], {'foo':'hi'})
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([{'foo':'there'}], (), [{'foo':'hi'}]))
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [{'foo':'there'}], ()))
+        eq_(attributes.instance_state(f).committed_state['someattr'],
+            {'foo': 'hi'})
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([{'foo': 'there'}], (), [{'foo': 'hi'}]))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [{'foo': 'there'}], ()))
+
+        # case 2.  object with direct dictionary settings (similar to a
+        # load operation)
 
-        # case 2.  object with direct dictionary settings (similar to a load operation)
         f = Foo()
-        f.__dict__['someattr'] = {'foo':'new'}
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [{'foo':'new'}], ()))
-
-        f.someattr = {'foo':'old'}
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([{'foo':'old'}], (), [{'foo':'new'}]))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [{'foo':'old'}], ()))
+        f.__dict__['someattr'] = {'foo': 'new'}
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [{'foo': 'new'}], ()))
+        f.someattr = {'foo': 'old'}
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([{'foo': 'old'}], (), [{'foo': 'new'}]))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [{'foo': 'old'}], ()))
 
     def test_flag_modified(self):
         class Foo(_base.BasicEntity):
             pass
 
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'someattr', uselist=False, useobject=False)
-
+        attributes.register_attribute(Foo, 'someattr', uselist=False,
+                useobject=False)
         f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), (), ()))
-
-        f.someattr = {'a':'b'}
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([{'a':'b'},], (), ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), (), ()))
+        f.someattr = {'a': 'b'}
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([{'a': 'b'}], (), ()))
         attributes.instance_state(f).commit_all(attributes.instance_dict(f))
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [{'a':'b'},], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [{'a': 'b'}], ()))
         f.someattr['a'] = 'c'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [{'a':'c'},], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [{'a': 'c'}], ()))
         attributes.flag_modified(f, 'someattr')
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([{'a':'c'},], (), ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([{'a': 'c'}], (), ()))
         f.someattr = ['a']
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([['a']], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([['a']], (), ()))
         attributes.instance_state(f).commit_all(attributes.instance_dict(f))
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [['a']], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [['a']], ()))
         f.someattr[0] = 'b'
         f.someattr.append('c')
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [['b', 'c']], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [['b', 'c']], ()))
         attributes.flag_modified(f, 'someattr')
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([['b', 'c']], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([['b', 'c']], (), ()))
 
     def test_use_object(self):
         class Foo(_base.BasicEntity):
@@ -1196,60 +1290,76 @@ class HistoryTest(_base.ORMTest):
         old = Bar(name='old')
 
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'someattr', uselist=False, useobject=True)
+        attributes.register_attribute(Foo, 'someattr', uselist=False,
+                useobject=True)
 
         # case 1.  new object
-        f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [None], ()))
 
+        f = Foo()
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [None], ()))
         f.someattr = hi
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([hi], (), ()))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [hi], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([hi], (), ()))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [hi], ()))
         f.someattr = there
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([there], (), [hi]))
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [there], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([there], (), [hi]))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [there], ()))
         del f.someattr
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([None], (), [there]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([None], (), [there]))
+
+        # case 2.  object with direct dictionary settings (similar to a
+        # load operation)
 
-        # case 2.  object with direct dictionary settings (similar to a load operation)
         f = Foo()
         f.__dict__['someattr'] = 'new'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), ['new'], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), ['new'], ()))
         f.someattr = old
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([old], (), ['new']))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([old], (), ['new']))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [old], ()))
 
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [old], ()))
+        # setting None on uninitialized is currently not a change for an
+        # object attribute (this is different than scalar attribute).  a
+        # lazyload has occured so if its None, its really None
 
-        # setting None on uninitialized is currently not a change for an object attribute
-        # (this is different than scalar attribute).  a lazyload has occured so if its
-        # None, its really None
         f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [None], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [None], ()))
         f.someattr = None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [None], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [None], ()))
         f = Foo()
         f.__dict__['someattr'] = 'new'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), ['new'], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), ['new'], ()))
         f.someattr = None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([None], (), ['new']))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([None], (), ['new']))
 
         # set same value twice
+
         f = Foo()
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
         f.someattr = 'one'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), (['one'], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), (['one'], (), ()))
         f.someattr = 'two'
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), (['two'], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), (['two'], (), ()))
 
     def test_object_collections_set(self):
         class Foo(_base.BasicEntity):
@@ -1260,48 +1370,55 @@ class HistoryTest(_base.ORMTest):
 
         instrumentation.register_class(Foo)
         instrumentation.register_class(Bar)
-        attributes.register_attribute(Foo, 'someattr', uselist=True, useobject=True)
-
+        attributes.register_attribute(Foo, 'someattr', uselist=True,
+                useobject=True)
         hi = Bar(name='hi')
         there = Bar(name='there')
         old = Bar(name='old')
         new = Bar(name='new')
 
         # case 1.  new object
-        f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [], ()))
 
+        f = Foo()
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [], ()))
         f.someattr = [hi]
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([hi], [], []))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [hi], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([hi], [], []))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [hi], ()))
         f.someattr = [there]
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([there], [], [hi]))
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [there], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([there], [], [hi]))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [there], ()))
         f.someattr = [hi]
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([hi], [], [there]))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([hi], [], [there]))
         f.someattr = [old, new]
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([old, new], [], [there]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([old, new], [], [there]))
+
+        # case 2.  object with direct settings (similar to a load
+        # operation)
 
-        # case 2.  object with direct settings (similar to a load operation)
         f = Foo()
         collection = attributes.init_collection(f, 'someattr')
         collection.append_without_event(new)
         attributes.instance_state(f).commit_all(attributes.instance_dict(f))
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [new], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [new], ()))
         f.someattr = [old]
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([old], [], [new]))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [old], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([old], [], [new]))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [old], ()))
 
     def test_dict_collections(self):
         class Foo(_base.BasicEntity):
@@ -1310,27 +1427,30 @@ class HistoryTest(_base.ORMTest):
             pass
 
         from sqlalchemy.orm.collections import attribute_mapped_collection
-
         instrumentation.register_class(Foo)
         instrumentation.register_class(Bar)
-        attributes.register_attribute(Foo, 'someattr', uselist=True, useobject=True, typecallable=attribute_mapped_collection('name'))
-
+        attributes.register_attribute(Foo, 'someattr', uselist=True,
+                useobject=True,
+                typecallable=attribute_mapped_collection('name'))
         hi = Bar(name='hi')
         there = Bar(name='there')
         old = Bar(name='old')
         new = Bar(name='new')
-
         f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [], ()))
         f.someattr['hi'] = hi
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([hi], [], []))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([hi], [], []))
         f.someattr['there'] = there
-        eq_(tuple([set(x) for x in attributes.get_state_history(attributes.instance_state(f), 'someattr')]), (set([hi, there]), set(), set()))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(tuple([set(x) for x in attributes.get_state_history(attributes.instance_state(f), 'someattr')]), (set(), set([hi, there]), set()))
+        eq_(tuple([set(x) for x in
+            attributes.get_state_history(attributes.instance_state(f),
+            'someattr')]), (set([hi, there]), set(), set()))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(tuple([set(x) for x in
+            attributes.get_state_history(attributes.instance_state(f),
+            'someattr')]), (set(), set([hi, there]), set()))
 
     def test_object_collections_mutate(self):
         class Foo(_base.BasicEntity):
@@ -1339,89 +1459,105 @@ class HistoryTest(_base.ORMTest):
             pass
 
         instrumentation.register_class(Foo)
-        attributes.register_attribute(Foo, 'someattr', uselist=True, useobject=True)
-        attributes.register_attribute(Foo, 'id', uselist=False, useobject=False)
+        attributes.register_attribute(Foo, 'someattr', uselist=True,
+                useobject=True)
+        attributes.register_attribute(Foo, 'id', uselist=False,
+                useobject=False)
         instrumentation.register_class(Bar)
-
         hi = Bar(name='hi')
         there = Bar(name='there')
         old = Bar(name='old')
         new = Bar(name='new')
 
         # case 1.  new object
-        f = Foo(id=1)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [], ()))
 
+        f = Foo(id=1)
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [], ()))
         f.someattr.append(hi)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([hi], [], []))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [hi], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([hi], [], []))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [hi], ()))
         f.someattr.append(there)
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([there], [hi], []))
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [hi, there], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([there], [hi], []))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [hi, there], ()))
         f.someattr.remove(there)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([], [hi], [there]))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([], [hi], [there]))
         f.someattr.append(old)
         f.someattr.append(new)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([old, new], [hi], [there]))
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [hi, old, new], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([old, new], [hi], [there]))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [hi, old, new], ()))
         f.someattr.pop(0)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([], [old, new], [hi]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([], [old, new], [hi]))
+
+        # case 2.  object with direct settings (similar to a load
+        # operation)
 
-        # case 2.  object with direct settings (similar to a load operation)
         f = Foo()
         f.__dict__['id'] = 1
         collection = attributes.init_collection(f, 'someattr')
         collection.append_without_event(new)
         attributes.instance_state(f).commit_all(attributes.instance_dict(f))
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [new], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [new], ()))
         f.someattr.append(old)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([old], [new], []))
-
-        attributes.instance_state(f).commit(attributes.instance_dict(f), ['someattr'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [new, old], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([old], [new], []))
+        attributes.instance_state(f).commit(attributes.instance_dict(f),
+                ['someattr'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [new, old], ()))
         f = Foo()
         collection = attributes.init_collection(f, 'someattr')
         collection.append_without_event(new)
         attributes.instance_state(f).commit_all(attributes.instance_dict(f))
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [new], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [new], ()))
         f.id = 1
         f.someattr.remove(new)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([], [], [new]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([], [], [new]))
 
         # case 3.  mixing appends with sets
+
         f = Foo()
         f.someattr.append(hi)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([hi], [], []))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([hi], [], []))
         f.someattr.append(there)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([hi, there], [], []))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([hi, there], [], []))
         f.someattr = [there]
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([there], [], []))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([there], [], []))
 
         # case 4.  ensure duplicates show up, order is maintained
+
         f = Foo()
         f.someattr.append(hi)
         f.someattr.append(there)
         f.someattr.append(hi)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([hi, there, hi], [], []))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([hi, there, hi], [], []))
         attributes.instance_state(f).commit_all(attributes.instance_dict(f))
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ((), [hi, there, hi], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ((), [hi, there, hi], ()))
         f.someattr = []
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'someattr'), ([], [], [hi, there, hi]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'someattr'), ([], [], [hi, there, hi]))
 
     def test_collections_via_backref(self):
         class Foo(_base.BasicEntity):
@@ -1431,24 +1567,32 @@ class HistoryTest(_base.ORMTest):
 
         instrumentation.register_class(Foo)
         instrumentation.register_class(Bar)
-        attributes.register_attribute(Foo, 'bars', uselist=True, backref='foo', trackparent=True, useobject=True)
-        attributes.register_attribute(Bar, 'foo', uselist=False, backref='bars', trackparent=True, useobject=True)
-
+        attributes.register_attribute(Foo, 'bars', uselist=True,
+                backref='foo', trackparent=True, useobject=True)
+        attributes.register_attribute(Bar, 'foo', uselist=False,
+                backref='bars', trackparent=True, useobject=True)
         f1 = Foo()
         b1 = Bar()
-        eq_(attributes.get_state_history(attributes.instance_state(f1), 'bars'), ((), [], ()))
-        eq_(attributes.get_state_history(attributes.instance_state(b1), 'foo'), ((), [None], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f1),
+            'bars'), ((), [], ()))
+        eq_(attributes.get_state_history(attributes.instance_state(b1),
+            'foo'), ((), [None], ()))
 
-        #b1.foo = f1
-        f1.bars.append(b1)
-        eq_(attributes.get_state_history(attributes.instance_state(f1), 'bars'), ([b1], [], []))
-        eq_(attributes.get_state_history(attributes.instance_state(b1), 'foo'), ([f1], (), ()))
+        # b1.foo = f1
 
+        f1.bars.append(b1)
+        eq_(attributes.get_state_history(attributes.instance_state(f1),
+            'bars'), ([b1], [], []))
+        eq_(attributes.get_state_history(attributes.instance_state(b1),
+            'foo'), ([f1], (), ()))
         b2 = Bar()
         f1.bars.append(b2)
-        eq_(attributes.get_state_history(attributes.instance_state(f1), 'bars'), ([b1, b2], [], []))
-        eq_(attributes.get_state_history(attributes.instance_state(b1), 'foo'), ([f1], (), ()))
-        eq_(attributes.get_state_history(attributes.instance_state(b2), 'foo'), ([f1], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(f1),
+            'bars'), ([b1, b2], [], []))
+        eq_(attributes.get_state_history(attributes.instance_state(b1),
+            'foo'), ([f1], (), ()))
+        eq_(attributes.get_state_history(attributes.instance_state(b2),
+            'foo'), ([f1], (), ()))
 
     def test_lazy_backref_collections(self):
         class Foo(_base.BasicEntity):
@@ -1467,24 +1611,25 @@ class HistoryTest(_base.ORMTest):
                 useobject=True)
         attributes.register_attribute(Bar, 'foo', uselist=False,
                 backref='bars', trackparent=True, useobject=True)
-
-        bar1, bar2, bar3, bar4 = [Bar(id=1), Bar(id=2), Bar(id=3), Bar(id=4)]
+        bar1, bar2, bar3, bar4 = [Bar(id=1), Bar(id=2), Bar(id=3),
+                                  Bar(id=4)]
         lazy_load = [bar1, bar2, bar3]
-
         f = Foo()
         bar4 = Bar()
         bar4.foo = f
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ([bar4], [bar1, bar2, bar3], []))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ([bar4], [bar1, bar2, bar3], []))
         lazy_load = None
         f = Foo()
         bar4 = Bar()
         bar4.foo = f
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ([bar4], [], []))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ([bar4], [], []))
         lazy_load = [bar1, bar2, bar3]
-        attributes.instance_state(f).expire_attributes(attributes.instance_dict(f), ['bars'])
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ((), [bar1, bar2, bar3], ()))
+        attributes.instance_state(f).expire_attributes(attributes.instance_dict(f),
+                ['bars'])
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ((), [bar1, bar2, bar3], ()))
 
     def test_collections_via_lazyload(self):
         class Foo(_base.BasicEntity):
@@ -1500,38 +1645,40 @@ class HistoryTest(_base.ORMTest):
         instrumentation.register_class(Bar)
         attributes.register_attribute(Foo, 'bars', uselist=True,
                 callable_=lazyload, trackparent=True, useobject=True)
-
-        bar1, bar2, bar3, bar4 = [Bar(id=1), Bar(id=2), Bar(id=3), Bar(id=4)]
+        bar1, bar2, bar3, bar4 = [Bar(id=1), Bar(id=2), Bar(id=3),
+                                  Bar(id=4)]
         lazy_load = [bar1, bar2, bar3]
-
         f = Foo()
         f.bars = []
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ([], [], [bar1, bar2, bar3]))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ([], [], [bar1, bar2, bar3]))
         f = Foo()
         f.bars.append(bar4)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ([bar4], [bar1, bar2, bar3], []) )
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ([bar4], [bar1, bar2, bar3], []))
         f = Foo()
         f.bars.remove(bar2)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ([], [bar1, bar3], [bar2]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ([], [bar1, bar3], [bar2]))
         f.bars.append(bar4)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ([bar4], [bar1, bar3], [bar2]))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ([bar4], [bar1, bar3], [bar2]))
         f = Foo()
         del f.bars[1]
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ([], [bar1, bar3], [bar2]))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ([], [bar1, bar3], [bar2]))
         lazy_load = None
         f = Foo()
         f.bars.append(bar2)
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bars'), ([bar2], [], []))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bars'), ([bar2], [], []))
 
     def test_scalar_via_lazyload(self):
         class Foo(_base.BasicEntity):
             pass
 
         lazy_load = None
+
         def lazyload(state, passive):
             return lazy_load
 
@@ -1540,35 +1687,39 @@ class HistoryTest(_base.ORMTest):
                 callable_=lazyload, useobject=False)
         lazy_load = 'hi'
 
-        # with scalar non-object and active_history=False, the lazy callable is only executed on gets, not history
-        # operations
+        # with scalar non-object and active_history=False, the lazy
+        # callable is only executed on gets, not history operations
 
         f = Foo()
-        eq_(f.bar, "hi")
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ((), ["hi"], ()))
-
+        eq_(f.bar, 'hi')
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ((), ['hi'], ()))
         f = Foo()
         f.bar = None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ([None], (), ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ([None], (), ()))
         f = Foo()
-        f.bar = "there"
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), (["there"], (), ()))
-        f.bar = "hi"
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), (["hi"], (), ()))
-
+        f.bar = 'there'
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), (['there'], (), ()))
+        f.bar = 'hi'
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), (['hi'], (), ()))
         f = Foo()
-        eq_(f.bar, "hi")
+        eq_(f.bar, 'hi')
         del f.bar
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ((), (), ["hi"]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ((), (), ['hi']))
         assert f.bar is None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ([None], (), ["hi"]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ([None], (), ['hi']))
 
     def test_scalar_via_lazyload_with_active(self):
         class Foo(_base.BasicEntity):
             pass
 
         lazy_load = None
+
         def lazyload(state, passive):
             return lazy_load
 
@@ -1578,29 +1729,32 @@ class HistoryTest(_base.ORMTest):
                 active_history=True)
         lazy_load = 'hi'
 
-        # active_history=True means the lazy callable is executed on set as well as get,
-        # causing the old value to appear in the history
+        # active_history=True means the lazy callable is executed on set
+        # as well as get, causing the old value to appear in the history
 
         f = Foo()
-        eq_(f.bar, "hi")
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ((), ["hi"], ()))
-
+        eq_(f.bar, 'hi')
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ((), ['hi'], ()))
         f = Foo()
         f.bar = None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ([None], (), ['hi']))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ([None], (), ['hi']))
         f = Foo()
-        f.bar = "there"
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), (["there"], (), ['hi']))
-        f.bar = "hi"
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ((), ["hi"], ()))
-
+        f.bar = 'there'
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), (['there'], (), ['hi']))
+        f.bar = 'hi'
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ((), ['hi'], ()))
         f = Foo()
-        eq_(f.bar, "hi")
+        eq_(f.bar, 'hi')
         del f.bar
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ((), (), ["hi"]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ((), (), ['hi']))
         assert f.bar is None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ([None], (), ["hi"]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ([None], (), ['hi']))
 
     def test_scalar_object_via_lazyload(self):
         class Foo(_base.BasicEntity):
@@ -1619,28 +1773,46 @@ class HistoryTest(_base.ORMTest):
         bar1, bar2 = [Bar(id=1), Bar(id=2)]
         lazy_load = bar1
 
-        # with scalar object, the lazy callable is only executed on gets and history
-        # operations
+        # with scalar object, the lazy callable is only executed on gets
+        # and history operations
 
         f = Foo()
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ((), [bar1], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ((), [bar1], ()))
         f = Foo()
         f.bar = None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ([None], (), [bar1]))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ([None], (), [bar1]))
         f = Foo()
         f.bar = bar2
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ([bar2], (), [bar1]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ([bar2], (), [bar1]))
         f.bar = bar1
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ((), [bar1], ()))
-
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ((), [bar1], ()))
         f = Foo()
         eq_(f.bar, bar1)
         del f.bar
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ([None], (), [bar1]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ([None], (), [bar1]))
         assert f.bar is None
-        eq_(attributes.get_state_history(attributes.instance_state(f), 'bar'), ([None], (), [bar1]))
+        eq_(attributes.get_state_history(attributes.instance_state(f),
+            'bar'), ([None], (), [bar1]))
+
+    def test_deprecated_flags(self):
+        assert_raises_message(
+            sa_exc.SADeprecationWarning,
+            "Passing True for 'passive' is deprecated. "
+            "Use attributes.PASSIVE_NO_INITIALIZE",
+            attributes.get_history, object(), 'foo', True
+        )
+
+        assert_raises_message(
+            sa_exc.SADeprecationWarning,
+            "Passing False for 'passive' is deprecated.  "
+            "Use attributes.PASSIVE_OFF",
+            attributes.get_history, object(), 'foo', False
+        )
 
 class ListenerTest(_base.ORMTest):
     def test_receive_changes(self):
@@ -1661,26 +1833,27 @@ class ListenerTest(_base.ORMTest):
 
         instrumentation.register_class(Foo)
         instrumentation.register_class(Bar)
-        attributes.register_attribute(Foo, 'data', uselist=False, useobject=False)
-        attributes.register_attribute(Foo, 'barlist', uselist=True, useobject=True)
-        attributes.register_attribute(Foo, 'barset', typecallable=set, uselist=True, useobject=True)
-        attributes.register_attribute(Bar, 'data', uselist=False, useobject=False)
-
+        attributes.register_attribute(Foo, 'data', uselist=False,
+                useobject=False)
+        attributes.register_attribute(Foo, 'barlist', uselist=True,
+                useobject=True)
+        attributes.register_attribute(Foo, 'barset', typecallable=set,
+                uselist=True, useobject=True)
+        attributes.register_attribute(Bar, 'data', uselist=False,
+                useobject=False)
         event.listen(Foo.data, 'set', on_set, retval=True)
         event.listen(Foo.barlist, 'append', append, retval=True)
         event.listen(Foo.barset, 'append', append, retval=True)
-
         f1 = Foo()
-        f1.data = "some data"
-        eq_(f1.data, "some data modified")
+        f1.data = 'some data'
+        eq_(f1.data, 'some data modified')
         b1 = Bar()
-        b1.data = "some bar"
+        b1.data = 'some bar'
         f1.barlist.append(b1)
-        assert b1.data == "some bar"
-        assert f1.barlist[0].data == "some bar appended"
-
+        assert b1.data == 'some bar'
+        assert f1.barlist[0].data == 'some bar appended'
         f1.barset.add(b1)
-        assert f1.barset.pop().data == "some bar appended"
+        assert f1.barset.pop().data == 'some bar appended'
 
     def test_propagate(self):
         classes = [None, None, None]
@@ -1710,13 +1883,16 @@ class ListenerTest(_base.ORMTest):
             instrumentation.register_class(classes[2])
 
         def attr_a():
-            attributes.register_attribute(classes[0], 'attrib', uselist=False, useobject=False)
+            attributes.register_attribute(classes[0], 'attrib',
+                    uselist=False, useobject=False)
 
         def attr_b():
-            attributes.register_attribute(classes[1], 'attrib', uselist=False, useobject=False)
+            attributes.register_attribute(classes[1], 'attrib',
+                    uselist=False, useobject=False)
 
         def attr_c():
-            attributes.register_attribute(classes[2], 'attrib', uselist=False, useobject=False)
+            attributes.register_attribute(classes[2], 'attrib',
+                    uselist=False, useobject=False)
 
         def set(state, value, oldvalue, initiator):
             canary.append(value)