def suggest_peer(self) -> Optional[bytes]:
        """Suggests a LN node to open a channel with.
        Returns a node ID (pubkey).
        """
        self.maybe_analyze_graph()
        if self._node_ratings:
            return self.suggest_node_channel_open()
        else:
            return None
Suggests a LN node to open a channel with.
        Returns a node ID (pubkey).
        
electrum/lnrater.py