Python使用线程来接收串口数据的方法

#!/usr/bin/env python
import serial
import time
import thread
  
class MSerialPort:
    message=''
    def __init__(self,port,buand):
        self.port=serial.Serial(port,buand)
        if not self.port.isOpen():
            self.port.open()
    def port_open(self):
        if not self.port.isOpen():
            self.port.open()
    def port_close(self):
        self.port.close()
    def send_data(self,data):
        number=self.port.write(data)
        return number
    def read_data(self):
        while True:
            data=self.port.readline()
            self.message+=data
if __name__=='__main__':
    mSerial=MSerialPort('/dev/ttyACM0',9600)
    thread.start_new_thread(mSerial.read_data,())
    while True:
        time.sleep(1)
        print mSerial.message
        print 'next line'