python 每隔1秒循环发10条数据 为什么是10条一起发出去的

def connectionMade(self):
logging.info('Got connection from :' + repr(self.transport.client))
boss_id = 0
while boss_id < self.count:
boss_id = boss_id + 1
msg = "{\"method\":\"getSimInfo\",\"id\":%d"%boss_id + ",\"params\":{\"simBankAddress\":1,\"bladeLogicalAddress\":1,\"simAddress\":%d}}"%boss_id
json_data = struct.pack('>cH{msg_len}s'.format(msg_len = len(msg)), '\x00', len(msg), msg)
reactor.callLater(10, self.transport.write, json_data)
#self.transport.write(json_data)
self.idSendList.append(boss_id)
logging.info('send :' + repr(json_data))
#time.sleep(5)