How to use the libpysal.weights.contiguity function in libpysal

def _create_neighborhood(self):
        """Create a neighborhood graph of all agents."""
        agents = self.agents
        shapes = [agent.shape for agent in agents]
        self._neighborhood = weights.contiguity.Queen.from_iterable(shapes)
        self._neighborhood.agents = agents
        self._neighborhood.idx = {}
        for agent, key in zip(agents, self._neighborhood.neighbors.keys()):
            self._neighborhood.idx[agent] = key