python-select异步IO

 #实现多任务在同一个线程切换
 #!/usr/bin/python

 from socket import *
 from select import *
 from time import ctime

 sockob=socket(AF_INET,SOCK_STREAM)
 sockob.bind(("127.0.0.1",7777))
 sockob.listen(5)
 inputs=[sockob]
 while 1:
     rs,ws,es=select(inputs,[],[])
     for i in rs:
         if i==sockob:
             connob,addr=sockob.accept()
             print "connect from",addr
             inputs.append(connob)
         else:
             try:
                 data=i.recv(1024)
                 disconnect=not data
             except:
                 disconnect=True
             if disconnect:
                 print i.getpeername(),"disconnect"
                 inputs.remove(i)
                 i.close()
             else:
                 i.send("[%s]:%s"%(ctime(),data))

 sockob.close()