Packages

The easiest way to obtain Python enabled clingo packages is using Anaconda. Packages are available in the Potassco channel. First install either Anaconda or Miniconda and then run: conda install -c potassco clingo.
Ubuntu users can install packages from our Ubuntu PPA.
Clingo's Python module is available on PyPI.
Packages for clingo are available for various Linux distributions including Debian, Ubuntu, and Arch Linux. (For historic reasons, the clingo package is split into gringo and clasp on Ubuntu/Debian.)
For Mac OS X, clingo packages are available in homebrew and macports.

Changes

allow for using not as a theory operator (#193)
improve parsing of disjunctions (#171)
rename max_size to size in APIs and remove previous size method
(breaks backward compatibility but makes things consistent)
refine cmake configuration variables (#283)
(package maintainers might have to pay attention here)
extend clingo API (#236, #231, #228, #227, #187, #171, #174, #183)
add type annotations and add stub files for type checkers (#212)
reimplement Python API using CFFI (#253)
(breaks backward compatibility regarding the AST and some details)
add remove_watch and freeze_literal to propagate_init (#285)
add support for Lua 5.4
add options to select specific Lua/Python versions
add single-shot solving option (#269)
(see installation instructions)
rename clingo.Tuple to clingo.Tuple_
(to avoid name clashes with typing.Tuple)
fix propagator initialization (#166)
fix cleanup function and handling of theory (#169)
fix shifting of disjunctions (in clasp) (#173)
fix handling of pools in externals (#179)
fix logger in Python API (#175)
fix memory bugs regarding strings (#196)
fix undo function (#191)
fix adding literals in propagate init (#192)
fix handling of undefined arithmetics (#218)
fix incremental grounding (#248)
fix/improve handling of classical negation (#268)
update to clasp version 3.3.6 fixing various issues