Natural Language Toolkit

The Natural Language Toolkit (NLTK) is an open source Python library for text analysis and natural language processing. NLTK can tokenize strings (create a list of words from a set of characters), identify parts of speech, and perform operations based on a word's context.

Do you want to contribute to NLTK development? Great! Please read CONTRIBUTING.md for more details. Have you found the toolkit helpful? Please support NLTK development by donating to the project via PayPal, using the link on the NLTK homepage. Bird, Steven, Edward Loper and Ewan Klein (2009). Natural Language Processing with Python. O'Reilly Media Inc. 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.