python nightmare

#!/usr/bin/env python
import time
import serial
g = str('gameboy')
x = str('test')
ser = serial.Serial(

               port='/dev/serial0',
               baudrate = 9600,
               parity=serial.PARITY_NONE,
               stopbits=serial.STOPBITS_ONE,
               bytesize=serial.EIGHTBITS,
               timeout=1
           )
counter=0
while 1:
               x=ser.readline()
               print x
               print str(g)
if str(g) ==  str(x)
               print 'gameboy read'