Python - Obtener puertos serie disponibles.

#-*- coding: utf -8 -*-

import serial

def puertos_seriales():

    ports = ['COM%s' % (i + 1) for i in range(256)]

    encontrados = []

    for port in ports:

        try:

            s = serial.Serial(port)

            s.close()

            encontrados.append(port)

        except (OSError, serial.SerialException):

            pass

    return encontrados

if __name__ == '__main__':

    print(puertos_seriales())