def metadata(self):
        """Returns the metadata for this EntitySet. The metadata will be recomputed if it does not exist."""
        if self._data_description is None:
            description = serialize.entityset_to_description(self)
            self._data_description = deserialize.description_to_entityset(description)

        return self._data_description
Returns the metadata for this EntitySet. The metadata will be recomputed if it does not exist.
featuretools/entityset/entityset.py