Add tutorial #197

README.md

@@ -280,6 +280,7 @@
 * [**Python**: _Building a Vector Space Indexing Engine in Python_](https://boyter.org/2010/08/build-vector-space-search-engine-python/)
 * [**Python**: _Building A Python-Based Search Engine_](https://www.youtube.com/watch?v=cY7pE7vX6MU) [video]
 * [**Python**: _Making text search learn from feedback_](https://medium.com/filament-ai/making-text-search-learn-from-feedback-4fe210fd87b0)
+* [**Python**: _Finding Important Words in Text Using TF-IDF_](https://stevenloria.com/tf-idf/)
 
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