This App will allow you to to view how favorable your NFL teams are on twitter. It all starts with a mapping from words to sentiment values.
Let W:={words∈dictionary} For each word, there exists a surjective function F:W−>{x∈Z:−1≤x≤1} such that F(w)=value For example, F(Bad)=−0.95 F(Good)=0.95 F(Cat)=0.0

This app was written in Python2.7 A good introduction to Sentiment Analysis is here