Python中pybluez模块无法实现通讯

代码运行到“client_sock,address = server_sock.accept()”就卡住了，显示代码还在运行中，没有任何输出，手机上显示蓝牙使用中。求解答，代码如下：

import bluetooth

server_sock=bluetooth.BluetoothSocket( bluetooth.RFCOMM )

port = 1
server_sock.bind(("",port))
server_sock.listen(1)

client_sock,address = server_sock.accept()
print( "Accepted connection from ",address)

data = client_sock.recv(1024)
print ("received [%s]" % data)

client_sock.close()
server_sock.close()

server_sock.accept()是等待连接
除非有客户端连接上这个侦听，否则它会一直卡在这里