What is NLTK?

NLTK (Natural Language Toolkit) is a leading open-source Python platform for building programs that work with human language data. It provides easy-to-use interfaces to over 50 corpora and lexical resources such as WordNet, along with a suite of text processing libraries for classification, tokenization, stemming, tagging, parsing, and semantic reasoning. NLTK is suitable for linguists, engineers, students, educators, researchers, and industry users alike, and is available for Windows, macOS, and Linux.

How to use NLTK?

Install NLTK using pip, then download the required data with nltk.download(). Use the provided interfaces to tokenize, tag, parse, and analyze text. Refer to the comprehensive API documentation and the online book 'Natural Language Processing with Python' for guidance.

Core features of NLTK

Easy-to-use interfaces to over 50 corpora and lexical resources (e.g., WordNet)
Text processing libraries for classification, tokenization, stemming, tagging, parsing, and semantic reasoning
Wrappers for industrial-strength NLP libraries
Active discussion forum and community support
Comprehensive API documentation and a hands-on guide for learning
Cross-platform support (Windows, macOS, Linux)