I need to extract the keywords given the news articles.From these keywords i need to phrase a query to perform the web search(eg:google). This is my problem statement.
For this purpose I came across a technique called tf-idf(Term frequency-inverted document frequency).But am not familiar with nltk.My questions is
1.Is tf-idf is available in that module,if so can you give some snippets?or do i have to implement the tf-idf algorithm?
Thanks in advance.

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