Python NLP libraries

The two Python libraries that we're going to use in this chapter are natural language toolkit (NLTK) and Gensim. We will use the first one for text preprocessing and the second one for training or machine learning models. To install them, activate your Python virtual environment:

> cd ~
> virtualenv swift-ml-book

And run pip install:

> pip install -U nltk gensim 

Official sites:

• NLTK, http://www.nltk.org/
  
• Gensim, https://radimrehurek.com/gensim/

Other popular libraries for NLP in Python:

• TextBlob, https://textblob.readthedocs.io/en/dev/
• Stanford's CoreNLP, https://stanfordnlp.github.io/CoreNLP/
• SpaCy, https://spacy.io/