The main purpose is the calculation of MusicBrainz Disc IDs from a CD-AUDIO disc or a TOC of such a disc, but reading of ISRCs and the MCN (EAN/UPC) are also supported.
Disc IDs can be submitted without further dependencies. For lookup and ISRC submission it is recommended to use it together with python-musicbrainzngs.
Python 2 >= 2.6 or Python 3 >= 3.1 as well as libdiscid >= 0.2.2 are required. Newer libdiscid features need a newer libdiscid, but there are methods available to check for these conditions.
If you still have a program using python-musicbrainz2, I recommend upgrading to the combination of python-discid and python-musicbrainzngs, since python-musicbrainz2 uses a deprecated web service and is not actively maintained anymore.
The main website and API documentation is at readthedocs, the repository and bugtracker are at GitHub.
Official source tarballs are available on pypi and releases are announced in this blog. There are several linux packages available and listed in the documentation.
If you have been using a pre-release version of python-discid you will have to update your code.
Compared to python-discid 0.5.0 you now have to use discid.get_default_device(), rather than discid.DEFAULT_DEVICE. If you were using 0.4.0, you should also stop using DiscId() directly or a DeprecationWarning is displayed.
There is also a patch release 1.0.2 available, which has no code changes compared to 1.0.0.
There was an intermediate 1.0.1, which tried to make some convenience changes for beta users, but failed. 1.0.1 was never available as a tarball, but the tag and changelog exists.