XMasTimer Raspberry PI

# Raspberry Pi custom Christmas light timer

from RPi import GPIO

"""
Setup GPIO pins as outputs
This convention is for the "P1" header pin convention
where the pins start with P1 in the upper left and go
to P26 in the lower right, with odds in the left column
and evens in the right column.

So, pins P1-11 and P1-12 correspond to GPIO17 and GPIO18
respectively.
"""
GPIO.setmode(GPIO.BOARD)
GPIO.setup(11, GPIO.OUT)
GPIO.setup(12, GPIO.OUT)


from time import sleep
from datetime import time, datetime

"""
LIST OF DAYS OF WEEK IN STRING FORMAT
"""
DOW = ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday']

class XMasTimer(object):
    def __init__(self):
        """
        Set a "wait time" in seconds. This ensures that the program pauses
        briefly after it turns the lights on or off. Otherwise, since the
        loop will execute more than once a second, it will try to keep
        turning the lights on when they are already on (or off when they are
        already off.
        """
        self.wait_time = 3
        """
        Enter the times you want the lights to turn on and off for
        each day of the week. Default is for lights to turn on at
        5:30pm and off at 10:30pm on weekdays, on at 5:00pm and off
        at 11:30pm on weekends. Note that this is using a 24-hour clock.
        """
        self.times = {
            'Monday': {
                'on': time(hour=17, minute=30, second=0),
                'off': time(hour=22, minute=30, second=0),
            },
            'Tuesday': {
                'on': time(hour=17, minute=30, second=0),
                'off': time(hour=22, minute=30, second=0),
            },
            'Wednesday': {
                'on': time(hour=17, minute=30, second=0),
                'off': time(hour=22, minute=30, second=0),
            },
            'Thursday': {
                'on': time(hour=17, minute=30, second=0),
                'off': time(hour=22, minute=30, second=0),
            },
            'Friday': {
                'on': time(hour=17, minute=30, second=0),
                'off': time(hour=22, minute=30, second=0),
            },
            'Saturday': {
                'on': time(hour=17, minute=0, second=0),
                'off': time(hour=23, minute=30, second=0),
            },
            'Sunday':{
                'on': time(hour=17, minute=0, second=0),
                'off': time(hour=23, minute=30, second=0),
            }
        }
        self.loop()

    def loop(self):
        while True:
            action = self.getAction()
            if action == 'ON':
                self.perform('ON')
            elif action == "OFF":
                self.perform('OFF')

    def currentDay(self):
        return self.times[DOW[datetime.now().weekday()]]

    def getAction(self):
        day = self.currentDay()
        now = datetime.now()

        if now.hour == day['on'].hour and \
           now.minute == day['on'].minute and \
           now.second == day['on'].second:
            return 'ON'
        elif now.hour == day['off'].hour and \
             now.minute == day['off'].minute and \
             now.second == day['off'].second:
                return 'OFF'
        return None

    def perform(self, action):
        pen = 11 if action is 'ON' else 12
        GPIO.output(pen, GPIO.HIGH)
        sleep(.5)
        GPIO.output(pen, GPIO.LOW)
        sleep(self.wait_time)


if __name__ == "__main__":
    XMasTimer()