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Python 3 Text Processing with NLTK 3 Cookbook - Second Edition
book

Python 3 Text Processing with NLTK 3 Cookbook - Second Edition

by Jacob Perkins
August 2014
Beginner to intermediate content levelBeginner to intermediate
304 pages
7h 10m
English
Packt Publishing
Content preview from Python 3 Text Processing with NLTK 3 Cookbook - Second Edition

Storing an ordered dictionary in Redis

An ordered dictionary is like a normal dict, but the keys are ordered by an ordering function. In the case of Redis, it supports ordered dictionaries whose keys are strings and whose values are floating point scores. This structure can come in handy in cases where we need to calculate the information gain (covered in the Calculating high information words recipe in Chapter 7, Text Classification), and when you want to store all the words and scores for later use.

Getting ready

Again, you'll need Redis and redis-py installed with an instance of redis-server running, as explained in the earlier recipe, Storing a frequency distribution in Redis.

How to do it...

The RedisOrderedDict class in rediscollections.py

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Publisher Resources

ISBN: 9781782167853Supplemental Content