python 获取串口名称

#!/usr/bin/env python  
# -*- coding: utf-8 -*  
   
import serial  
import serial.tools.list_ports  
   
port_list = list(serial.tools.list_ports.comports())  
   
if len(port_list) <= 0:  
    print "The Serial port can't find!"  
       
else:  
    port_list_0 =list(port_list[0])  
   
    port_serial = port_list_0[0]  
   
    ser = serial.Serial(port_serial,9600,timeout = 60)  
   
    print "check which port was really used >",ser.name