def __init__(self, parent=None, key_name=None, _app=None, **kwds):
    """Creates a new instance of this expando model.

    Args:
      parent: Parent instance for this instance or None, indicating a top-
        level instance.
      key_name: Name for new model instance.
      _app: Intentionally undocumented.
      args: Keyword arguments mapping to properties of model.
    """
    super(Expando, self).__init__(parent, key_name, _app, **kwds)
    self._dynamic_properties = {}
    for prop, value in kwds.iteritems():
      if prop is self.properties():
        setattr(self, prop, value)
dataset/ETHPy150Open CollabQ/CollabQ/.google_appengine/google/appengine/ext/db/__init__.py/Expando.__init__/operator `not in` -> `is`