simple script which reopens same tty

gistfile1.py

import serial
import struct
import sys
import time


def open_and_cat():

    port = serial.Serial(sys.argv[1], sys.argv[2], bytesize=8, parity='N', stopbits=1, xonxoff=0, rtscts=0, timeout=2)
    while True:
        data = port.read(1)
        if len(data)!=0:
            sys.stdout.write(data)
            sys.stdout.flush()


while True:
    try:
        open_and_cat()
    except:
        print "error on port, trying again"
        
    time.sleep(0.5)