import serial
import serial.tools.list_ports
from easygui import *
 
port_list = list(serial.tools.list_ports.comports())
if len(port_list) <= 0:
  print "The Serial port can't find!"
 
else:
  for i in list(port_list):

 #print i[0] 仅仅输出端口号，像COM1、COM3、COM9

# -*- 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