Python provides many libraries which are used in web development, a few of them are:

Django is a high-level web framework. It provides a clean and pragmatic design, robust URL routing, and automatic administration interface.

Django

Flask is a lightweight web framework that provides flexibility and control to developers. It is best suited for small to medium-sized applications.

Flask

Pyramid is a general-purpose web framework that is highly flexible and adaptable.

Pyramid

CherryPy is a minimalist web framework that is designed for building web applications with fewer lines of code.

CherryPy

Web2py is a full-stack web framework that is designed for rapid development.

Web2py

Bottle is a fast and simple web framework that is ideal for building small web applications. It supports a wide range of plugins.

Bottle

Tornado is a high-performance web framework that is designed for building scalable and real-time web applications.

Tornado