Python script to show whom of those one follow on twitch.tv is live and capable of opening them with livestreamer.

twinfo.py

""" twinfo will show you which of the channels you follow are currently live,
and allow you to input a number to open it with livestreamer[0].

[0]: https://github.com/chrippa/livestreamer
"""

import grequests
import requests
import argparse
import os


class Twinfo:
    def __init__(self, username):
        self.username = username
        self.create_url_list()
        self.make_async_requests()
        self.create_lookup_list()
        self.live_channels()
        self.open_livestreamer()

    def create_url_list(self):
        payload = {'limit': '100'}
        url = 'https://api.twitch.tv/kraken/users/{}/follows/channels'.format(
            self.username
        )
        r = requests.get(url, params=payload)
        template = 'https://api.twitch.tv/kraken/streams/{}'
        self.urls = [
            template.format(c['channel']['name']) for c in r.json()['follows']
        ]

    def make_async_requests(self):
        rs = (grequests.get(u) for u in self.urls)
        self.streams = grequests.map(rs)

    def create_lookup_list(self):
        live_list = []
        for stream in self.streams:
            stream_json = stream.json()['stream']
            if stream_json:
                live_list.append(stream_json['channel']['url'])

        index_list = list(xrange(len(live_list)))
        self.lookup_list = dict(zip(index_list, live_list))

    def live_channels(self):
        headline = 'Live channels that {} follows:'.format(self.username)
        headline_length = len(headline)
        print '*' * headline_length
        print headline
        print '*' * headline_length
        for index, stream in self.lookup_list.iteritems():
            print '  {0}: {1}'.format(index, stream[21:])
            print '-' * headline_length

    def open_livestreamer(self):
        index = raw_input('\nEnter channel number (or q to quit): ')
        if index == 'q':
            return
        else:
            print 'Opening in livestreamer...\n'
            os.system('livestreamer {} best'.format(
                self.lookup_list[int(index)])
            )

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument('username', help="Your twitch.tv username")
    args = parser.parse_args()
    Twinfo(args.username)