def __getattr__(self, key):
    if self._dynamic_properties and key in self._dynamic_properties:
      return self._dynamic_properties[key]
    else:
      return getattr(super(Expando, self), key)
If no explicit attribute defined, retrieve value from entity.
dataset/ETHPy150Open CollabQ/CollabQ/.google_appengine/google/appengine/ext/db/__init__.py/Expando.__getattr__