install nltk

Natural Language Toolkit (NLTK)

The Natural Language Toolkit (NLTK) is a powerful library in Python designed for working with human language data, or "natural language processing" (NLP). NLTK provides a suite of tools for processing and analyzing text data, allowing developers and researchers to perform a wide range of NLP tasks, from basic operations like tokenizing text to more complex tasks such as training machine learning models for sentiment analysis or topic modeling.

Key Features of NLTK

Tokenization

Splitting text into words, sentences, or phrases.

Stemming and Lemmatization

Reducing words to their base or root form.

POS (Part-of-Speech) Tagging

Identifying parts of speech like nouns, verbs, adjectives, etc.

Named Entity Recognition (NER)

Identifying and classifying proper nouns, such as people or places.

Parsing and Syntax Analysis

Analyzing sentence structure.

Text Classification

Categorizing text into pre-defined labels (e.g., spam vs. not spam).

Corpora and Lexical Resources

Access to extensive datasets and lexical resources such as WordNet, Gutenberg, and Brown Corpora for language analysis.

NLTK Common Uses

Text Processing

Preparing data for analysis by cleaning, transforming, and tokenizing text.

Language Modeling

Analyzing patterns in text, often for applications like predictive text.

Sentiment Analysis

Determining the sentiment behind texts (e.g., positive, negative).

Educational Purposes

Used extensively in NLP education due to its simplicity and comprehensive documentation.

NLTK is widely used in academia and industry and is suitable for beginners due to its easy-to-understand functions and detailed documentation. It can be combined with more advanced libraries like "spaCy*" and "Transformers" for complex NLP tasks.

Install nltk

I search many times and didn’t get good information to install NLTK for Python 3.6 for windows or earlier version.
There are not well documents issued with python installation on 64-bit or 32-bit Windows.
If you try any of the NLTK setups, “nltk-3.2.4.win32.exe (md5)”, you’ll get “Python is not found in the registry” error.

How to install NLTK

I found the solution to install manually NLTK installation-package:
Step 1:
Install Python from the link https://www.python.org/downloads/
Step 2:
Download nltk package nltk-3.2.4.tar.gz (md5) from the link https://pypi.python.org/pypi/nltk
Don’t download nltk-3.2.4.win32.exe (md5) because its showing the error “Python is not found in the registry”
Step 3:
When the tar zip file download is completed, copy the file nltk-3.2.4.tar.gz (md5) into the c:\Python directory or where python3.6 is installed and then extract nltk-3.2.4.tar.gz (md5) the file, using winzip.
After extraction you may get the following files in the directory C:\Python36\nltk-3.2.4

Step 4:
Strat command line, change the directory
CD C:\Python36\nltk-3.2.4
Run the command

Step 5:
After the setup.py install command, installation finished, copy the nltk dir from the path C:\Python36\ nltk-3.2.4\nltk, then past it into the following directory, C:\Python36\Lib\site-packages
You may get the following files and directories.