Changelog - version 1

v1.4.2 (released 20/03/2026)

This a minor release which contains a number of minor improvements to the documentation, and some fixes to the return types of the ToddCoxeter methods related to lookahead and lookbehind.

• Todd coxeter rtypes by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/406

• Doc fixes by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/407

v1.4.1 (released 17/03/2026)

This a minor release which includes the latest version of libsemigroups (v3.5.3), which contains a number of important bugfixes. There are also some improvements to the documentation.

v1.4.0 (released 25/02/2026)

This is a minor release including some improvements and new features:

• Update to libsemigroups v3.5.0 and add the new features it contains.

• transf: future proof __getitem__ by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/382

• todd-coxeter: update for changes in libsemigroups by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/388

v1.3.0 (released 18/01/2026)

• Update to libsemigroups v3.4.0 and add features introduced there by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/380

v1.2.0 (released 16/12/2025)

This is a minor release incorporating a number of bugfixes/improvements in libsemigroups. Support for HPCombi transformation types is also added for the first time!

• Drop support for Python 3.9 support Python 3.14 by @Joseph-Edwards in https://github.com/libsemigroups/libsemigroups_pybind11/pull/335

• Remove Union by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/339

• Import file modules in __init__ by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/338

• Sync aho corasick by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/340

• konieczny: add init mem fn by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/349

• word-graph: fix follow_path return type by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/348

• paths: add helpers by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/350

• Sync Forest and its helpers with recent changes in libsemigroups by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/347

• Sync presentation by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/351

• Sync examples by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/353

• Sync to<Presentation> upstream enhancements by @jswent in https://github.com/libsemigroups/libsemigroups_pybind11/pull/358

• hpcombi: support Vect16 + PTransf16 + subclasses by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/355

• paths: update for fixes in libsemigroups by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/363

New Contributors

• @jswent made their first contribution in https://github.com/libsemigroups/libsemigroups_pybind11/pull/359

v1.1.0 (released 30/09/2025)

This is a minor release with a few new features from libsemigroups and some bugfixes:

• Throw if bad alphabet or rules by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/317

• Add some missing and features from the presentation namespace by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/318

• Test default values and datetime types by @Joseph-Edwards in https://github.com/libsemigroups/libsemigroups_pybind11/pull/324

• Todd coxeter additions by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/328

v1.0.1 (released 13/08/2025)

This is a minor release that adds some missing files to the PyPI source.

v1.0.0 (released 12/08/2025)

This is a major release that significantly expands the API of libsemigroups_pybind11 to expose much of the functionality implemented in version 3 of libsemigroups. The extent of the changes made in this release means that it is likely that any code written with earlier versions of libsemigroups_pybin11 will no longer work.

The structure of libsemigroups_pybind11 is very tightly linked to the structure of libsemigroups. Therefore, some of the differences between v0.10.1 and v1.0.0 of libsemigroups_pyind11 will be related to the differences between v2 and v3 of libsemigroups, such as changes to class names and interfaces. These changes can be found in the libsemigroups changelog.