Apolló mozi, Debrecen, aktuális havi moziműsor

apollo.py

#!/usr/bin/env python3

import sys
from datetime import datetime
import webbrowser

MONTHS = {
    1: 'januar',
    2: 'februar',
    3: 'marcius',
    4: 'aprilis',
    5: 'majus',
    6: 'junius',
    7: 'julius',
    8: 'augusztus',
    9: 'szeptember',
    10: 'oktober',
    11: 'november',
    12: 'december',
}

url_template = "http://apollomozi.hu/{month}i-mozimusor-2"

def main(offset):
    current_month = int(datetime.now().strftime('%m'))
    current_month += offset
    if current_month == 0:
        current_month = 12
    url = url_template.format(month=MONTHS[current_month])
    print("#", url)
    webbrowser.open_new_tab(url)

##############################################################################

if __name__ == "__main__":
    number_of_params = len(sys.argv[1:])
    if number_of_params == 0:
        main(offset=0)
    elif number_of_params == 1:
        if sys.argv[1] != "-1":
            print("Error: if you provide a parameter, then it must be '-1'!", file=sys.stderr)
            exit(1)
        # else
        main(offset=-1)
    else:
        print("Error: there can be only one parameter!", file=sys.stderr)
        exit(1)