import asyncore
import socket

class async_hello(asyncore.dispatcher_with_send):
    def __init__(self, host, port=9090):
        asyncore.dispatcher_with_send.__init__(self)
        self.host = host
        self.port = port
        self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
        self.connect((host, port))

    def __repr__(self):
        return "<async_hello %s:%d>" % (self.host, self.port)

    def handle_connect(self):
        self.send("hello world")

    def handle_expt(self):
        print "get exception"
        self.close()

    def handle_close(self):
        self.close()

def test():
    async_hello('localhost')
    asyncore.loop(use_poll=True)

if __name__ == "__main__":
    test()