From Creating a subset of words from a corpus in R, the answerer can easily convert a term-document matrix into a word cloud easily.
term-document matrix
Is there a similar
Here's a blog post which does just that: http://peekaboo-vision.blogspot.com/2012/11/a-wordcloud-in-python.html
The whole code is here: https://github.com/amueller/word_cloud