Can I use NLTK to determine if a comment is a positive one or a negative one?

Question

Can you show me a simple example using http://www.nltk.org/code to determine if a string about a happy or upset mood?

Answer 1

Pattern is something worthwhile a test drive too: you can see two opinion mining experiments right on the project homepage.

http://www.clips.ua.ac.be/pages/pattern-examples-100days

http://www.clips.ua.ac.be/pages/pattern-examples-elections