MARISA Trie

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:target: https://pypi.python.org/pypi/marisa-trie

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:target: https://github.com/pytries/marisa-trie/actions/workflows/tests.yml

Static memory-efficient Trie-like structures for Python (3.7+)
based on marisa-trie_ C++ library.

String data in a MARISA-trie may take up to 50x-100x less memory than
in a standard Python dict; the raw lookup speed is comparable; trie also
provides fast advanced methods like prefix search.

.. note::

There are official SWIG-based Python bindings included
in C++ library distribution; this package provides alternative
Cython-based pip-installable Python bindings.

.. _marisa-trie: https://github.com/s-yata/marisa-trie

Installation

::

python -m pip install -U marisa-trie

Usage

See tutorial_ and API_ for details.

.. _tutorial: https://marisa-trie.readthedocs.io/en/latest/tutorial.html
.. _API: https://marisa-trie.readthedocs.io/en/latest/api.html

Current limitations

The library is not tested with mingw32 compiler;
.prefixes() method of BytesTrie and RecordTrie is quite slow
and doesn't have iterator counterpart;
read() and write() methods don't work with file-like objects
(they work only with real files; pickling works fine for file-like objects);
there are keys() and items() methods but no values() method.

License

Wrapper code is licensed under MIT License.

Bundled marisa-trie_ C++ library is dual-licensed under
LGPL and BSD 2-clause license.

CHANGES

1.2.1 (2024-10-12)

Publish Python 3.13 wheels (only CPython ones, PyPy ones are skipped until https://github.com/pypa/distutils/issues/283 is fixed).
Rebuild Cython wrapper with Cython 3.0.11.

1.2.0 (2024-06-05)

Added Python 3.13 support (#105).
Rebuild Cython wrapper with Cython 3.0.10 (#105).

1.1.1 (2024-05-06)

Publish Linux aarch64 wheels (#101).

1.1.0 (2023-10-06)

Added Python 3.12 support.

1.0.0 (2023-09-03)

Dropped Python 2.7, 3.4, 3.5, 3.6 support.
Added Trie.map() (#90).
Rebuilt Cython wrapper with Cython 3.0.2.
Fixed benchmark documentation typos (#89).

0.8.0 (2023-03-25)

Add Trie.iter_prefixes_with_ids() method to return (prefix, id) pairs (#83).
Rebuild Cython wrapper with Cython 0.29.33 (#88).

0.7.8 (2022-10-25)

Added Python 3.11 support.
Rebuild Cython wrapper with Cython 0.29.32.

0.7.7 (2021-08-04)

Restored Python 2.7 support.
Fixed README image references not working on Windows.

0.7.6 (2021-07-28)

Wheels are now published for all platforms.
Fixed ResourceWarning: unclosed file in setup.py.
Run black on the entire source code.
Moved the QA/CI to GitHub.
Rebuild Cython wrapper with Cython 0.29.24.
Updated libmarisa-trie to the latest version (0.2.6).
Fixed failing tests and usage of deprecated methods.
Expanded supported Python version (2.7, 3.4 - 3.10).

0.7.5 (2018-04-10)

Removed redundant DeprecationWarning messages in Trie.save and
Trie.load.
Dropped support for Python 2.6.
Rebuild Cython wrapper with Cython 0.28.1.

0.7.4 (2017-03-27)

Fixed packaging issue, MANIFEST.in was not updated after libmarisa-trie
became a submodule.

0.7.3 (2017-02-14)

Added BinaryTrie for storing arbitrary sequences of bytes, e.g. IP
addresses (thanks Tomasz Melcer);
Deprecated Trie.has_keys_with_prefix which can be trivially implemented in
terms of Trie.iterkeys;
Deprecated Trie.read and Trie.write which onlywork for "real" files
and duplicate the functionality of load and save. See issue #31 on
GitHub;
Updated libmarisa-trie to the latest version. Yay, 64-bit Windows support.
Rebuilt Cython wrapper with Cython 0.25.2.

0.7.2 (2015-04-21)

packaging issue is fixed.

0.7.1 (2015-04-21)

setup.py is switched to setuptools;
a tiny speedup;
wrapper is rebuilt with Cython 0.22.

0.7 (2014-12-15)

trie1 == trie2 and trie1 != trie2 now work (thanks Sergei Lebedev);
for key in trie: is fixed (thanks Sergei Lebedev);
wrapper is rebuilt with Cython 0.21.1 (thanks Sergei Lebedev);
https://bitbucket.org/kmike/marisa-trie repo is no longer supported.

0.6 (2014-02-22)

New Trie methods: __getitem__, get, items, iteritems.
trie[u'key'] is now the same as trie.key_id(u'key').
small optimization for BytesTrie.get.
wrapper is rebuilt with Cython 0.20.1.

0.5.3 (2014-02-08)

small Trie.restore_key optimization (it should work 5-15% faster)

0.5.2 (2014-02-08)

fix Trie.restore_key method - it was reading past declared string length;
rebuild wrapper with Cython 0.20.

0.5.1 (2013-10-03)

has_keys_with_prefix(prefix) method (thanks
Matt Hickford <https://github.com/matt-hickford>_)

0.5 (2013-05-07)

BytesTrie.iterkeys, BytesTrie.iteritems,
RecordTrie.iterkeys and RecordTrie.iteritems methods;
wrapper is rebuilt with Cython 0.19;
value_separator parameter for BytesTrie and RecordTrie.

0.4 (2013-02-28)

improved trie building: weights optional parameter;
improved trie building: unnecessary input sorting is removed;
wrapper is rebuilt with Cython 0.18;
bundled marisa-trie C++ library is updated to svn r133.

0.3.8 (2013-01-03)

Rebuild wrapper with Cython pre-0.18;
update benchmarks.

0.3.7 (2012-09-21)

Update bundled marisa-trie C++ library (this may fix more mingw issues);
Python 3.3 support is back.

0.3.6 (2012-09-05)

much faster (3x-7x) .items() and .keys() methods for all tries;
faster (up to 3x) .prefixes() method for Trie.

0.3.5 (2012-08-30)

Pickling of RecordTrie is fixed (thanks lazarou for the report);
error messages should become more useful.

0.3.4 (2012-08-29)

Issues with mingw32 should be resolved (thanks Susumu Yata).

0.3.3 (2012-08-27)

.get(key, default=None) method for BytesTrie and RecordTrie;
small README improvements.

0.3.2 (2012-08-26)

Small code cleanup;
load, read and mmap methods returns 'self';
I can't run tests (via tox) under Python 3.3 so it is
removed from supported versions for now.

0.3.1 (2012-08-23)

.prefixes() support for RecordTrie and BytesTrie.

0.3 (2012-08-23)

RecordTrie and BytesTrie are introduced;
IntTrie class is removed (probably temporary?);
dumps/loads methods are renamed to tobytes/frombytes;
benchmark & tests improvements;
support for MARISA-trie config options is added.

0.2 (2012-08-19)

Pickling/unpickling support;
dumps/loads methods;
python 3.3 workaround;
improved tests;
benchmarks.

0.1 (2012-08-17)

Initial release.

Dependencies of marisa-trie (4).
Dependency	Optional
setuptools	false
hypothesis	true
pytest	true
readme-renderer	true

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marisa-trie

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