问asyncores的handle_close持续不断地发射

EN

import asyncore
import socket
import json

class ConnHandler(asyncore.dispatcher_with_send):

    def __init__(self, conn, handlerlist):
        asyncore.dispatcher_with_send.__init__(self, conn)
        self.handlers = handlerlist

    def handle_close(self):
        self.close()
        print 'Socket closed'
        if(self.handlers.count(self) > 0):
            self.handlers.remove(self);

    def handle_read(self):
        data = ''
        more = True
        while more:
            try:
                data += self.recv(1024)
            except socket.error, e:
                more = False

        if data == '':
            return

        try:
            message = json.loads(data)
        except ValueError:
            self.send('Invalid JSON\n')
            return

        print message


class TestServer(asyncore.dispatcher):

    def __init__(self, host, port):
        asyncore.dispatcher.__init__(self)
        self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
        self.set_reuse_addr()
        self.bind((host, port))
        self.listen(5)
        self.handlers = []

    def handle_accept(self):
        pair = self.accept()
        if pair is not None:
            sock, addr = pair
            print 'Incoming connection from %s' % repr(addr)
            self.handlers.append(ConnHandler(sock, self.handlers))

    def sendToAll(self, string):
        for h in self.handlers:
            h.send(string + '\n')

server = TestServer('localhost', 55555)
asyncore.loop()