+Fetching binary content (cover art)
+-----------------------------------
+
+Fetching album covers is possible with albumart, here is an example:
+
+.. code-block:: python
+
+ >>> cli = musicpd.MPDClient()
+ >>> cli.connect()
+ >>> track = "Steve Reich/1978-Music for 18 Musicians"
+ >>> aart = cli.albumart(track, 0)
+ >>> received = int(aart.get('binary'))
+ >>> size = int(aart.get('size'))
+ >>> with open('/tmp/cover', 'wb') as cover:
+ >>> # aart = {'size': 42, 'binary': 2051, data: bytes(...)}
+ >>> cover.write(aart.get('data'))
+ >>> while received < size:
+ >>> aart = cli.albumart(track, received)
+ >>> cover.write(aart.get('data'))
+ >>> received += int(aart.get('binary'))
+ >>> if received != size:
+ >>> print('something went wrong', file=sys.stderr)
+ >>> cli.disconnect()
+
+A `CommandError` is raised if the album does not expose a cover.
+
+You can also use `readpicture` command to fetch embedded picture:
+
+.. code-block:: python
+
+ >>> cli = musicpd.MPDClient()
+ >>> cli.connect()
+ >>> track = 'muse/Amon Tobin/2011-ISAM/01-Amon Tobin - Journeyman.mp3'
+ >>> rpict = cli.readpicture(track, 0)
+ >>> if not rpict:
+ >>> print('No embedded picture found', file=sys.stderr)
+ >>> sys.exit(1)
+ >>> size = int(rpict['size'])
+ >>> done = int(rpict['binary'])
+ >>> with open('/tmp/cover', 'wb') as cover:
+ >>> cover.write(rpict['data'])
+ >>> while size > done:
+ >>> rpict = cli.readpicture(track, done)
+ >>> done += int(rpict['binary'])
+ >>> print(f'writing {rpict["binary"]}, done {100*done/size:03.0f}%')
+ >>> cover.write(rpict['data'])
+ >>> cli.disconnect()
+
+Refer to `MPD protocol documentation`_ for the meaning of `binary`, `size` and `data`.