ran make lint

examples/ping/ping.py

@@ -1,18 +1,26 @@
 import argparse
-import sys
 
 import multiaddr
 import trio
 
-from libp2p import new_host
-from libp2p.network.stream.net_stream_interface import INetStream
-from libp2p.peer.peerinfo import info_from_p2p_addr
-from libp2p.typing import TProtocol
+from libp2p import (
+    new_host,
+)
+from libp2p.network.stream.net_stream_interface import (
+    INetStream,
+)
+from libp2p.peer.peerinfo import (
+    info_from_p2p_addr,
+)
+from libp2p.typing import (
+    TProtocol,
+)
 
 PING_PROTOCOL_ID = TProtocol("/ipfs/ping/1.0.0")
 PING_LENGTH = 32
 RESP_TIMEOUT = 60
 
+
 async def handle_ping(stream: INetStream) -> None:
     while True:
         try:
@@ -27,11 +35,12 @@ async def handle_ping(stream: INetStream) -> None:
         except:
             await stream.reset()
 
+
 async def send_ping(stream: INetStream) -> None:
     try:
         payload = b"\x01" * PING_LENGTH
         print(f"sending ping to {stream.muxed_conn.peer_id}")
-        
+
         await stream.write(payload)
 
         with trio.fail_after(RESP_TIMEOUT):
@@ -39,10 +48,11 @@ async def send_ping(stream: INetStream) -> None:
 
         if response == payload:
             print(f"received pong from {stream.muxed_conn.peer_id}")
-    
+
     except Exception as e:
         print(f"error occurred : {e}")
 
+
 async def run(port: int, destination: str) -> None:
     localhost_ip = "127.0.0.1"
     listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
@@ -58,7 +68,7 @@ async def run(port: int, destination: str) -> None:
                 f"-d /ip4/{localhost_ip}/tcp/{port}/p2p/{host.get_id().pretty()}\n"
             )
             print("Waiting for incoming connection...")
-        
+
         else:
             maddr = multiaddr.Multiaddr(destination)
             info = info_from_p2p_addr(maddr)
@@ -66,20 +76,20 @@ async def run(port: int, destination: str) -> None:
             stream = await host.new_stream(info.peer_id, [PING_PROTOCOL_ID])
 
             nursery.start_soon(send_ping, stream)
-            
+
             return
 
         await trio.sleep_forever()
 
+
 def main() -> None:
-    
     description = """
     This program demonstrates a simple p2p ping application using libp2p.
     To use it, first run 'python ping.py -p <PORT>', where <PORT> is the port number.
     Then, run another instance with 'python ping.py -p <ANOTHER_PORT> -d <DESTINATION>',
     where <DESTINATION> is the multiaddress of the previous listener host.
     """
-    
+
     example_maddr = (
         "/ip4/127.0.0.1/tcp/8000/p2p/QmQn4SwGkDZKkUEpBRBvTmheQycxAHJUNmVEnjA2v1qe8Q"
     )
@@ -99,11 +109,12 @@ def main() -> None:
 
     if not args.port:
         raise RuntimeError("failed to determine local port")
-    
+
     try:
         trio.run(run, *(args.port, args.destination))
     except KeyboardInterrupt:
         pass
 
+
 if __name__ == "__main__":
-    main()
+    main()