MRoom queue status fetcher

mroom.py

import sys
import json
from time import sleep

try:
    # For Python 3.0 and later
    from urllib.request import urlopen, Request
    from urllib.error import HTTPError
except ImportError:
    from urllib2 import urlopen, Request, HTTPError

class SlugNotFoundException(Exception):
    pass

def get_data():
    try:
        res = urlopen('https://mroom.com/content/themes/propaganda/proxywithcountries.php')
        return json.loads(res.read().decode('utf-8'))
    except HTTPError as e:
        print('Error fetching data %s' % e)

def get_location_strings():
    return map(lambda x: '%s - %s' % (x['slug'], x['name']), get_data())

def print_availability(slug):
    data = get_data()
    loc = next(iter(filter(lambda x: x['slug'] == slug, data)), None)
    if not loc:
        raise SlugNotFoundException('Could not find the store you asked for: %s' % slug)
    args = (loc['name'], loc['start'], loc['end'], loc['queue']['employees'], loc['queue']['count'])
    print('Location %s opens at %s and closes at %s, has currently %d employees and %d people in queue' % args)

if len(sys.argv) < 2:
    locs = get_location_strings()
    print('Please give one of the locations as an argument')
    for loc in locs:
        print(loc)
    exit(1)

slug = sys.argv[1]
try:
    while True:
        print_availability(slug)
        sleep(10)
except SlugNotFoundException:
    print('Given location id invalid: %s' % slug)