Adding example for unfollowing/deleting a playlist (#746)

* Adding example for deleting a playlist

* Renaming to unfollow_playlist

examples/unfollow_playlist.py

@@ -0,0 +1,31 @@
+import argparse
+import logging
+
+import spotipy
+from spotipy.oauth2 import SpotifyOAuth
+
+logger = logging.getLogger('examples.unfollow_playlist')
+logging.basicConfig(level='DEBUG')
+
+'''
+Spotify doesn't have a dedicated endpoint for deleting a playlist. However,
+unfollowing a playlist has the effect of deleting it from the user's account.
+When a playlist is removed from the user's account, the system unfollows it,
+and then no longer shows it in playlist list.'''
+
+
+def get_args():
+    parser = argparse.ArgumentParser(description='Unfollows a playlist')
+    parser.add_argument('-p', '--playlist', required=True,
+                        help='Playlist id')
+    return parser.parse_args()
+
+
+def main():
+    args = get_args()
+    sp = spotipy.Spotify(auth_manager=SpotifyOAuth())
+    sp.current_user_unfollow_playlist(args.playlist)
+
+
+if __name__ == '__main__':
+    main()