PiBorg (python3)

import time
import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)

GPIO.setup(17,GPIO.OUT)
GPIO.setup(18,GPIO.OUT)
GPIO.setup(22,GPIO.OUT)
GPIO.setup(23,GPIO.OUT)

def forwards():
        GPIO.output(17,0)
        GPIO.output(18,1)
        GPIO.output(22,0)
        GPIO.output(23,1)
def backwards():
        GPIO.output(17,1)
        GPIO.output(18,0)
        GPIO.output(22,1)
        GPIO.output(23,0)
def left():
        GPIO.output(17,0)
        GPIO.output(18,1)
        GPIO.output(22,1)
        GPIO.output(23,0)
def right():
        GPIO.output(17,1)
        GPIO.output(18,0)
        GPIO.output(22,0)
        GPIO.output(23,1)
def stop():
        GPIO.output(17,0)
        GPIO.output(18,0)
        GPIO.output(22,0)
        GPIO.output(23,0)

def getch():
  import sys, tty, termios
  old_settings = termios.tcgetattr(0)
  new_settings = old_settings[:]
  new_settings[3] &= ~termios.ICANON
  try:
    termios.tcsetattr(0, termios.TCSANOW, new_settings)
    ch = sys.stdin.read(1)
  finally:
    termios.tcsetattr(0, termios.TCSANOW, old_settings)
  return ch

def done():
    stop()
    GPIO.cleanup()
    print('\n')
    exit(1)

print('Ready for commands (w for forwards, s for backwards,\na for rotate left, d for rotate right,\nq to quit:')
while True:
    direction = getch()
    if direction == 'w':
        forwards()
        time.sleep(1)
    elif direction == 's':
        backwards()
        time.sleep(1)
    elif direction == 'a':
        left()
        time.sleep(0.25)
    elif direction == 'd':
        right()
        time.sleep(0.25)
    elif direction == 'q':
        done()
    else:
        print('Command not found')
    stop()