The source code behind @nilsplaying.

tweet_np.py

#!/usr/bin/python2
#
# tweet_np.py
#
# Copyright (C) 2013 nilsding
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
#   - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ -
#
# How to use:
#   In the ncmpcpp config file, set `execute_on_song_change' to the full
#   path of the script, e.g. "/home/nilsding/.ncmpcpp/tweet_np.py"
#
#   - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ -

class config:
    now_playing_format = '{%a - }{%t}|{%f} {[%l]}' # Song format as defined by ncmpcpp(1)
    tweet_format = '#np %nowplaying%' # Tweet format, '%nowplaying%' is replaced by the song currently played

    class oauth:
        consumer_key = 'get'
        consumer_secret = 'your'
        access_token = '1966170554-own'
        access_token_secret = 'keys'

#   - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ -

import sys
import tweepy
import traceback
import subprocess

np = subprocess.check_output(['ncmpcpp', '--now-playing', config.now_playing_format])
tweet_text = config.tweet_format.replace('%nowplaying%', str(np))

auth = tweepy.OAuthHandler(config.oauth.consumer_key, config.oauth.consumer_secret)
auth.set_access_token(config.oauth.access_token, config.oauth.access_token_secret)
api = tweepy.API(auth)
try:
        api.update_status(tweet_text)
except:
        print >>sys.stderr, 'failed to tweet'
        traceback.print_exc()