led.py

import logging
import RPi.GPIO as GPIO
import time

DURATION_VERY_SHORT = 0.2
DURATION_SHORT = 0.5
DURATION_NORMAL = 1

class Led(object):
  """An LED class"""

  def __init__(self, pin, name):
    self.pin = pin
    self.name = name

    # Setup GPIO
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(pin, GPIO.OUT)
    GPIO.output(pin, False)

  def blink(self, duration=DURATION_NORMAL):
    """Blink once"""
    print 'Led blink'
    GPIO.output(self.pin, True)
    time.sleep(duration)
    GPIO.output(self.pin, False)

  def blink_for(self, times=10, light=DURATION_NORMAL, sleep=DURATION_NORMAL):
    """Blink specifying time, light duration and sleep duration"""
    for x in range(0, times):
      self.blink(light)
      time.sleep(sleep)

  def blink_twice(self):
    """Blink twice"""
    self.blink_for(2, DURATION_VERY_SHORT, DURATION_VERY_SHORT)