def __init__(self, parent=None, key_name=None, _app=None, **kwds):
    super(Expando, self).__init__(parent, key_name, _app, **kwds)
    self._dynamic_properties = {}
    for prop, value in kwds.iteritems():
      if prop not in self.properties():
        setattr(self, prop, value)
Creates a new instance of this expando model.
dataset/ETHPy150Open CollabQ/CollabQ/.google_appengine/google/appengine/ext/db/__init__.py/Expando.__init__