(self)
return frozenset(chain(*tuple((sm.dirty for sm
                                       in itervalues(self._models)))))
The set of instances in this :class:`Session` which have
been modified.
The set of instances in this :class:`Session` which have
been modified.
The set of instances in this : class : Session which have been modified .
def dirty(self):
        '''The set of instances in this :class:`Session` which have
been modified.'''
        return frozenset(chain(*tuple((sm.dirty for sm
                                       in itervalues(self._models)))))
def dirty ( self ) : return frozenset ( chain ( * tuple ( ( sm . dirty for sm in itervalues ( self . _models ) ) ) ) )