new_contents: # The MIT License (MIT)
  #
  # Copyright (c) 2015 Frederic Jacob
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  #
  #
  # Simple proxy class for access of the GPIO bus on the Raspberry Pi.
  #
  
  import RPi.GPIO as GPIO
  
  IN = GPIO.IN
  OUT = GPIO.OUT
  
  class gpio:
      count = 0
  
      def __init__(self, pin, direction):
          gpio.count = gpio.count + 1
          self.pin = pin
          GPIO.setmode(GPIO.BCM)
          GPIO.setup(pin, direction)
  
      def __del__(self):
          gpio.count = gpio.count - 1
          if gpio.count == 0:
              GPIO.cleanup()
  
      def input(self):
          return GPIO.input(self.pin)
  
      def output(self, value):
          GPIO.output(self.pin, value)
  
      def on(self):
          GPIO.output(self.pin, 1)
  
      def off(self):
          GPIO.output(self.pin, 0)
  
subject: Add the GPIO proxy class for the Raspberry Pi