Creating word clouds

You may have seen word clouds produced by Wordle or other software before. If not, you will see them soon enough in this chapter. A couple of Python libraries can create word clouds; however, these libraries don't seem to be able to beat the quality produced by Wordle yet. We can create a word cloud via the Wordle web page at Wordle requires a list of words and weights in the following format:

Word1 : weight 
Word2 : weight 

Modify the code from the previous example to print the word list. As a metric, we will use the word frequency and select the top percent. We don't need anything new for this. The final code is in the ch-09.ipynb file in this book's code bundle:

from nltk.corpus import movie_reviews ...

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