def qname(self, uri):
        if hasattr(self, 'namespace_manager') or self.namespace_manager:
            return self.namespace_manager.qname(uri)
        raise UnSupportedAggregateOperation()
dataset/ETHPy150Open RDFLib/rdflib/rdflib/graph.py/ReadOnlyGraphAggregate.qname/operator `and` -> `or`