new_contents: import RPi.GPIO as gpio
  import time
  import sys
  import Tkinter as tk
  
  def init():
      gpio.setmode(gpio.BOARD)
      gpio.setup(7, gpio.OUT)
      gpio.setup(11, gpio.OUT)
      gpio.setup(13, gpio.OUT)
      gpio.setup(15, gpio.OUT)
  
  def forward(tf):
      gpio.output(7, False)
      gpio.output(11, True)
      gpio.output(13, True)
      gpio.output(15, False)
      time.sleep(tf)
      gpio.cleanup()
  
  def reverse(tf):
      gpio.output(7, True)
      gpio.output(11, False)
      gpio.output(13, False)
      gpio.output(15, True)
      time.sleep(tf)
      gpio.cleanup()
  
  def turn_left(tf):
      gpio.output(7, True)
      gpio.output(11, True)
      gpio.output(13, True)
      gpio.output(15, False)
      time.sleep(tf)
      gpio.cleanup()
  
  def turn_right(tf):
      gpio.output(7, False)
      gpio.output(11, True)
      gpio.output(13, False)
      gpio.output(15, False)
      time.sleep(tf)
      gpio.cleanup()
  
  def pivot_left(tf):
      gpio.output(7, True)
      gpio.output(11, False)
      gpio.output(13, True)
      gpio.output(15, False)
      time.sleep(tf)
      gpio.cleanup()
  
  def pivot_right(tf):
      gpio.output(7, False)
      gpio.output(11, True)
      gpio.output(13, False)
      gpio.output(15, True)
      time.sleep(tf)
      gpio.cleanup()
  
  
  
  def key_input(event):
      init()
      print 'Key:', event.char
      key_press = event.char
      sleep_time = 0.030
  
      if key_press.lower() == 'w':
          forward(sleep_time)
      elif key_press.lower() == 's':
          reverse(sleep_time)
      elif key_press.lower() == 'a':
          turn_left(sleep_time)
      elif key_press.lower() == 'd':
          turn_right(sleep_time)
      elif key_press.lower() == 'q':
          pivot_left(sleep_time)
      elif key_press.lower() == 'e':
          pivot_right(sleep_time)
      else:
          pass
  
  
  command = tk.Tk()
  command.bind('<KeyPress>', key_input)
  command.mainloop()
  
subject: Create robot4.py