Python socket programlama port hatası

import socket

host = "127.0.0.1"
port = 80

s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

s.bind((host,port))

s.listen()

conn,addr = s.accept()

if conn:
 print(f"Bir kullanıcı bağlandı.{addr}")
 while 1:

 ldata = conn.recv(1024)

 if ldata.decode("utf-8") == "exit":
 conn.close()

 else:
 print(ldata.decode("utf-8"))

 data = input("message")

 if data.encode("utf-8") == "exit":
 conn.close()

 else:
 conn.sendall(data.encode("utf-8"))