Serial communication to arduino, requires pyserial.

arduinocom.py

import serial
import time
import msvcrt
from msvcrt import getch

byte1 = 50
byte2 = 51

print "***********************************"
print "********Opening Serial Port********"
print "***********************************"
arduino = serial.Serial(2, 9600)
time.sleep(3)
while(True):  
    key = ord(getch())
    if key == 49:
        print "DEBUG: RELAY INI1 TOGGLED"
        arduino.write(chr(byte1))
    elif key == 50:
        arduino.write(chr(byte2))
        print "DEBUG: RELAY INI2 TOGGLED"
    elif key == 113:
        print "**************EXIT***************"
        break