Natural Language Processing with Python

This is a book about Natural Language Processing. By "natural language" we mean a language that is used for everyday communication by humans; languages like English, Hindi or Portuguese. In contrast to artificial languages such as programming languages and mathematical notations, natural languages have evolved as they pass from generation to generation, and are hard to pin down with explicit rules. We will take Natural Language Processing — or NLP for short — in a wide sense to cover any kind of computer manipulation of natural language. At one extreme, it could be as simple as counting word frequencies to compare different writing styles. At the other extreme, NLP involves "understanding" complete human utterances, at least to the extent of being able to give useful responses to them.
Online book:
http://www.nltk.org/book/ch00.html

NLTK 3.0 documentation:

http://www.nltk.org/

Qgrid

Qgrid is an IPython extension which uses SlickGrid to render pandas DataFrames within an IPython notebook. It's being developed for use in Quantopian's hosted research environment, and this repository holds the latest source code:

https://github.com/quantopian/qgrid


Demo:

http://nbviewer.ipython.org/github/quantopian/qgrid/blob/master/qgrid_demo.ipynb