timer.py

#!/usr/bin/python

import time
import argparse
import os
import sys
import signal

# The default amount of time for pizza cooking (13mins)
DEFAULT_PIZZA_TIME = 780


def sigint_handler(signal, frame):
    sys.exit(0)


def my_usage(progname):
    return progname + ' [-h] [([-H H] [-m m] [-s s]) | --pizza]'


def main():
    parser = argparse.ArgumentParser(
        description='This is a timer, which makes beeping sound after a' +
        ' configured time', usage=my_usage(os.path.basename(__file__)))

    group_time = parser.add_argument_group('Time options')
    group_time.add_argument('-H', type=int, nargs=1,
                            help='number of hours', default=[0])
    group_time.add_argument('-m', type=int, nargs=1,
                            help='number of mintes', default=[0])
    group_time.add_argument('-s', type=int, nargs=1,
                            help='number of seconds', default=[0])

    parser.add_argument('--pizza', action='store_true',
                        help='I want to make a pizza!', default=False)

    args = parser.parse_args()
    more_than_one_sec = False

    if args.pizza:
        # The pizza parameter is set, so we ignore every given value, and we
        # wait default_pizza amount of time
        time.sleep(DEFAULT_PIZZA_TIME)
        more_than_one_sec = True
    else:
        # We are not cooking a pizza, so we wait the defiend amount of time
        hours_in_seconds = args.H[0] * 60 * 60
        minutes_in_seconds = args.m[0] * 60
        sum_of_secs = hours_in_seconds + minutes_in_seconds + args.s[0]
        time.sleep(sum_of_secs)
        if sum_of_secs > 0:
            more_than_one_sec = True

    if more_than_one_sec:
        for i in range(50):
            print('\r\a', end='')
            sys.stdout.flush()
            time.sleep(0.2)
    else:
        print('No timer was set, thus at least one sec must be defined')


if __name__ == '__main__':
    signal.signal(signal.SIGINT, sigint_handler)
    main()