[SOCKET] simple python echo server

#!/usr/bin/env python

"""
An echo server that uses select to handle multiple clients at a time.
Entering any line of input at the terminal will exit the server.
"""

import select
import socket
import sys

host = ''
port = 50000
backlog = 5
size = 1024
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind((host,port))
server.listen(backlog)
input = [server,sys.stdin]
running = 1
while running:
inputready,outputready,exceptready = select.select(input,[],[])

for s in inputready:

if s == server:
# handle the server socket
client, address = server.accept()
input.append(client)

elif s == sys.stdin:
# handle standard input
junk = sys.stdin.readline()
running = 0

else:
# handle all other sockets
data = s.recv(size)
if data:
s.send(data)
else:
s.close()
input.remove(s)
server.close()