Question

I am using Gensim python toolkit to build tf-idf model for documents. So I need to create a dictionary for all documents first. However, I found Gensim does not use stemming before creating the dictionary and corpus. Am I right ?

Answer 1

You are correct. Gensim doesn’t do anything special other than convert what you give it into different models.

Here is the relevant quote and the link that it is from:

The ways to process documents are so varied and application- and
language-dependent that I decided to not constrain them by any
interface. Instead, a document is represented by the features
extracted from it, not by its “surface” string form: how you get to
the features is up to you.

From Strings to Vectors