def on_detach(self, fgraph):
        if fgraph is not self.fgraph:
            raise Exception("detaching wrong fgraph", fgraph)
        del self.destroyers
        del self.view_i
        del self.view_o
        del self.clients
        del self.stale_droot
        assert self.fgraph.destroyer_handler > self
        delattr(self.fgraph, 'destroyers')
        delattr(self.fgraph, 'destroy_handler')
        self.fgraph = None
dataset/ETHPy150Open rizar/attention-lvcsr/libs/Theano/theano/gof/destroyhandler.py/DestroyHandler.on_detach/operator `is` -> `>`