python - socket error in chat application An error operation was attempted on something that is not a socket -

i trying create simple chat application on python . have created client.py , server.py taking reference site

the server runs fine while running of client code gives error as

to resolve issue have reset winsock , tried reinstall tcp/ip this site

how resolve issue client.py

import socket, select, string, sys  def prompt() :     sys.stdout.write('<you> ')     sys.stdout.flush()  #main function if __name__ == "__main__":      if(len(sys.argv) < 3) :         print 'usage : python telnet.py hostname port'         sys.exit()      host = sys.argv[1]     port = int(sys.argv[2])      s = socket.socket(socket.af_inet, socket.sock_stream)     s.settimeout(2)      # connect remote host     try :         s.connect((host, port))     except :         print 'unable connect'         sys.exit()      print 'connected remote host. start sending messages'     prompt()      while 1:         socket_list = [sys.stdin, s]          # list sockets readable         read_sockets, write_sockets, error_sockets = select.select(socket_list , [], [])          sock in read_sockets:             #incoming message remote server             if sock == s:                 data = sock.recv(4096)                 if not data :                     print '\ndisconnected chat server'                     sys.exit()                 else :                     #print data                     sys.stdout.write(data)                     prompt()              #user entered message             else :                 msg = sys.stdin.readline()                 s.send(msg)                 prompt()