# File: select-example-1.py

import select
import socket
import time

PORT = 8037

TIME1970 = 2208988800L

service = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
service.bind(("", PORT))
service.listen(1)

print "listening on port", PORT

while 1:
    is_readable = [service]
    is_writable = []
    is_error = []
    r, w, e = select.select(is_readable, is_writable, is_error, 1.0)
    if r:
        channel, info = service.accept()
        print "connection from", info
        t = int(time.time()) + TIME1970
        t = chr(t>>24&255) + chr(t>>16&255) + chr(t>>8&255) + chr(t&255)
        channel.send(t) # send timestamp
        channel.close() # disconnect
    else:
        print "still waiting"

## listening on port 8037
## still waiting
## still waiting
## connection from ('127.0.0.1', 1469)
## still waiting
## connection from ('127.0.0.1', 1470)
## ...