Does NLTK have TF-IDF implemented?

Question

There are TF-IDF implementations in scikit-learn and gensim.

There are simple implementations Simple implementation of N-Gram, tf-idf and

Answer 1

I guess, there are enough evidences to conclude non-existence of TF-IDF in NLTK:

1. Unfortunately, calculating tf-idf is not available in NLTK so we'll use another data analysis library, scikit-learn

   from COMPSCI 290-01 Spring 2014 lab

2. More important, source code contains nothing related to tfidf (or tf-idf). Exceptions are NLTK-contrib, which contains map-reduce implementation for TF-IDF.

There are several libs for tf-idf mentioned in related question.

Upd: search by tf idf or tf_idf lets to find the function already found by @yvespeirsman