卡在模块脚本中

Question

客户端脚本：

class TCPClient(object):
    def __init__(self, counter, host, port, io_loop=None):
        self.counter=counter
        self.host = host
        self.port = port
        self.io_loop = io_loop

        self.shutdown = False
        self.stream = None
        self.sock_fd = None

        self.EOF = b' END'

    def get_stream(self):
        self.sock_fd = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
        self.stream = tornado.iostream.IOStream(self.sock_fd)
        self.stream.set_close_callback(self.on_close)

    def connect(self):
        self.get_stream()
        self.stream.connect((self.host, self.port), self.send_message)

    def on_receive(self, data):
        logging.info("Received: %s", data)
        self.stream.close()

    def on_close(self):
        if self.shutdown:
            self.io_loop.stop()

    def send_message(self):

        mac_adresi = 123

        my_json_string = json.dumps(OrderedDict(mac_adresi=mac_adresi, adet=self.counter))

        self.stream.write(my_json_string)
        self.stream.read_until(self.EOF, self.on_receive)

    def set_shutdown(self):
        self.shutdown = True

def main(counter, host, port, io_loop):

    io_loop = tornado.ioloop.IOLoop.instance()

    c1 = TCPClient(counter, host, port, io_loop)
    c1.connect()
    c1.set_shutdown()

    io_loop.start()

反脚本：

import Client

counter = 0

while 1:
    counter += 1
    if counter%9 > 5:
        Client.main(counter, "127.0.0.1", 51276)

问题是如果我从计数器脚本调用客户端脚本的 main ，客户端脚本执行一次并卡住在那里，无法返回反脚本。

我想在不阻止 Counter Script 的情况下发送请求，如果任何时候 counter 大于 5 。