syntax error in python code

Question

Can you tell me where the syntax error in this code is??

import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BOARD)

GPIO.setup(4, GPIO.IN)

try: 
    while True:
        if (GPIO.input(4) == 1):
            print "button pressed"
        else:
            print "he"
GPIO.cleanup()

it should print button pressed when the gpio pin on my raspberry pi gets power when the button on the board is pressed. but i get an error all the time i run the code in the console running raspbian. most of the errors say "invalid syntax" and than the last codeline of the script.

Post the full error you're getting.

Martin Tournoij
– Martin Tournoij

2014-02-10 01:03:38 +00:00
Commented Feb 10, 2014 at 1:03 — Martin Tournoij
– Martin Tournoij, Commented Feb 10, 2014 at 1:03

Graeme Perrow · Accepted Answer · 2014-02-10 01:04:52Z

2

You have a try with no except clause. You need something like:

try:
    while True:
        if (GPIO.input(4) == 1):
            print "button pressed"
        else:
            print "he"
except:
    # handle exception here
    pass # if you want to ignore it
GPIO.cleanup()

answered Feb 10, 2014 at 1:04

Graeme Perrow

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2 Comments

Crag Over a year ago

yeah now the syntax error is gone. great but i got this: RuntimeError: No access to /dev/mem. Try running as root! i tried running as root but still this error

Graeme Perrow Over a year ago

That's a different problem and I can't help you with that one. You'll need to ask a new question.

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