UDP Demo with select()

# Based on Demo code from http://www.evolt.org/node/60276
# by Premshree Pillai, Mumbai University, India.

import select
import sys
from socket import *

host = "localhost"
port = 21567
buf = 1024
addr = (host,port)

DUMPERS = {}
def dump(data, addr):
  print "GOT <%s> from %s" % (data, addr)
  print type(data)

UDPSock = socket(AF_INET,SOCK_DGRAM)
if sys.argv[1:] and sys.argv[1] == 's':
  UDPSock.bind(addr)
  DUMPERS[UDPSock] = dump
  rd, wr, er = select.select([UDPSock], [], [], 999)
  print rd, wr, er

  data,addr = rd[0].recvfrom(buf)
  DUMPERS[rd[0]](data, addr)

else:
  data = "I wish I were an Oscar Meyer Wiener!"
  UDPSock.sendto(data,addr)

Server prints:

[<socket._socketobject object at 0xb7d371ec>] [] []
GOT <I wish I were an Oscar Meyer Wiener!> from ('127.0.0.1', 58621)
<type 'str'>