text: from abc import ABC, abstractmethod
  
  
  class IHost(ABC):
  
      @abstractmethod
      def get_id(self):
          """
          :return: peer_id of host
          """
  
      @abstractmethod
      def get_network(self):
          """
          :return: network instance of host
          """
  
      @abstractmethod
      def get_mux(self):
          """
          :return: mux instance of host
          """
  
      @abstractmethod
      def get_addrs(self):
          """
          :return: all the multiaddr addresses this host is listening too
          """
  
      @abstractmethod
      def set_stream_handler(self, protocol_id, stream_handler):
          """
          set stream handler for host
          :param protocol_id: protocol id used on stream
          :param stream_handler: a stream handler function
          :return: true if successful
          """
  
      # protocol_id can be a list of protocol_ids
      # stream will decide which protocol_id to run on
      @abstractmethod
      def new_stream(self, peer_id, protocol_ids):
          """
          :param peer_id: peer_id that host is connecting
          :param protocol_ids: protocol ids that stream can run on
          :return: true if successful
          """
  
      @abstractmethod
      def connect(self, peer_info):
          """
          connect ensures there is a connection between this host and the peer with
          given peer_info.peer_id. connect will absorb the addresses in peer_info into its internal
          peerstore. If there is not an active connection, connect will issue a
          dial, and block until a connection is open, or an error is
          returned.
  
          :param peer_info: peer_info of the host we want to connect to
          :type peer_info: peer.peerinfo.PeerInfo
          """
  