12 best Python Search Engine libraries in 2025

The Python search engine libraries are the most commonly used search engine APIs to perform the crawling and indexing of web pages. A python search engine library is a collection of classes and functions that you can use to build your own search engine. sis is a Python library for developing statistical natural language processing tools. It is an open source project and has been developed by IBM's Columbia University research lab. The main aim of this project is to provide a flexible API for researchers and developers who want to create their own NLP tools. Mwmbl is an open source project that provides a Python API for the well-known Apache Mahout Machine Learning Library. The iffse project (if this, then that) is an open source project providing a simple way to write search rules in natural language. Check out the list of free, open source Python search engine libraries to help you with your projects.