# Example for RC timing reading for Raspberry Pi
# Must be used with GPIO 0.3.1a or later - earlier verions
# are not fast enough!
 
import RPi.GPIO as GPIO, time, os      
 
DEBUG = 1
GPIO.setmode(GPIO.BOARD)
 
def RCtime(RCpin):
        reading = 0
        GPIO.setup(RCpin, GPIO.OUT)
        GPIO.output(RCpin, GPIO.LOW)
        time.sleep(0.1)
 
        GPIO.setup(RCpin, GPIO.IN)
        # This takes about 1 millisecond per loop cycle
        while (GPIO.input(RCpin) == GPIO.LOW):
                reading += 1
        return reading
 
#loop until keyboard interrupt
try:
    while True:
        # Read RC timing using pin #12
        value = RCtime(12)
        print value
except KeyboardInterrupt:
    pass
    
GPIO.cleanup()
# Example for RC timing reading for Raspberry Pi
# Must be used with GPIO 0.3.1a or later - earlier verions
# are not fast enough!
 
import RPi.GPIO as GPIO, time, os      
 
DEBUG = 1
GPIO.setmode(GPIO.BOARD)
 
def RCtime(RCpin):
        reading = 0
        GPIO.setup(RCpin, GPIO.OUT)
        GPIO.output(RCpin, GPIO.LOW)
        time.sleep(0.1)
 
        GPIO.setup(RCpin, GPIO.IN)
        # This takes about 1 millisecond per loop cycle
        while (GPIO.input(RCpin) == GPIO.LOW):
                reading += 1
        return reading
 
#loop until keyboard interrupt
try:
    while True:
        # Read RC timing using pin #12
        value = RCtime(12)
        print "%d" % value
except KeyboardInterrupt:
    pass
    
GPIO.cleanup()
correct print syntax