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Natural Language Toolkit (NLTK)

PyPI Travis

NLTK -- the Natural Language Toolkit -- is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing.

For documentation, please visit nltk.org.

Contributing

Do you want to contribute to NLTK development? Great! Please read more details at CONTRIBUTING.md.

See also How to contribute to NLTK.

Donate

Have you found the toolkit helpful? Please support NLTK development by donating to the project via PayPal, using the link on the NLTK homepage.

Citing

If you publish work that uses NLTK, please cite the NLTK book, as follows:

Bird, Steven, Edward Loper and Ewan Klein (2009).
Natural Language Processing with Python.  O'Reilly Media Inc.

Copyright

Copyright (C) 2001-2020 NLTK Project

For license information, see LICENSE.txt.

AUTHORS.md have a list of everyone contributed to NLTK.

Redistributing

  • NLTK source code is distributed under the Apache 2.0 License.
  • NLTK documentation is distributed under the Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States license.
  • NLTK corpora are provided under the terms given in the README file for each corpus; all are redistributable and available for non-commercial use.
  • NLTK may be freely redistributed, subject to the provisions of these licenses.