import serial
            import struct
            import binascii

            #Function to Initialize the Serial Port
            def init_serial():

                global ser       #Must be declared in Each Function
                ser = serial.Serial()
                ser.baudrate = 9600

                ser.port = '/dev/ttyACM0' #com port of avr

                ser.timeout = 10
                ser.open()          #Opens SerialPort
                # print port open or closed
                if ser.isOpen():
                    print 'Open: ' + ser.portstr

                    init_serial()
                    values = (1)
                    s = struct.Struct('I')
                    packed_data = s.pack(*values)

            ser.write(packed_data)    #Writes to the SerialPort

            while 1:

                bytes = ser.readline()  #Read from Serial Port
                packed_data = binascii.unhexlify(bytes)
                s = struct.Struct('I')
                unpacked_data = s.unpack(packed_data)
                print 'You sent: ', unpacked_data      #Print What is Read from Port

            #Ctrl+C to Close Python Window