Implemented Host that includes a routing system. Explicitly separating different Host types as in Go implementation

libp2p/host/basic_host.py

@@ -13,9 +13,7 @@ from libp2p.protocol_muxer.exceptions import MultiselectClientError, Multiselect
 from libp2p.protocol_muxer.multiselect import Multiselect
 from libp2p.protocol_muxer.multiselect_client import MultiselectClient
 from libp2p.protocol_muxer.multiselect_communicator import MultiselectCommunicator
-from libp2p.routing.kademlia.kademlia_peer_router import KadmeliaPeerRouter
 from libp2p.typing import StreamHandlerFn, TProtocol
-
 from .host_interface import IHost
 
 # Upon host creation, host takes in options,
@@ -34,16 +32,14 @@ class BasicHost(IHost):
     """
 
     _network: INetwork
-    _router: KadmeliaPeerRouter
     peerstore: IPeerStore
 
     multiselect: Multiselect
     multiselect_client: MultiselectClient
 
-    def __init__(self, network: INetwork, router: KadmeliaPeerRouter = None) -> None:
+    def __init__(self, network: INetwork) -> None:
         self._network = network
         self._network.set_stream_handler(self._swarm_stream_handler)
-        self._router = router
         self.peerstore = self._network.peerstore
         # Protocol muxing
         self.multiselect = Multiselect()
@@ -87,7 +83,7 @@ class BasicHost(IHost):
         return addrs
 
     def set_stream_handler(
-        self, protocol_id: TProtocol, stream_handler: StreamHandlerFn
+            self, protocol_id: TProtocol, stream_handler: StreamHandlerFn
     ) -> None:
         """
         set stream handler for given `protocol_id`
@@ -97,7 +93,7 @@ class BasicHost(IHost):
         self.multiselect.add_handler(protocol_id, stream_handler)
 
     async def new_stream(
-        self, peer_id: ID, protocol_ids: Sequence[TProtocol]
+            self, peer_id: ID, protocol_ids: Sequence[TProtocol]
     ) -> INetStream:
         """
         :param peer_id: peer_id that host is connecting