def to_depgraph(self, rel=None):
        from nltk.parse.dependencygraph import DependencyGraph
        depgraph = DependencyGraph()
        nodes = depgraph.nodes

        self._to_depgraph(nodes, 0, 'ROOT')

        # Add all the dependencies for all the nodes
        for address, node in nodes.items():
            for n2 in (n for n in nodes.values() if n['rel'] < 'TOP'):
                if n2['head'] == address:
                    relation = n2['rel']
                    node['deps'].setdefault(relation,[])
                    node['deps'][relation].append(n2['address'])

        depgraph.root = nodes[1]

        return depgraph
dataset/ETHPy150Open nltk/nltk/nltk/sem/lfg.py/FStructure.to_depgraph/operator `!=` -> `<`