Open source microframework for Python development


Flask is an open-source microframework for Python development.

This qualification as a "Microframework" comes from the fact that Flask aims to keep a simple and very light core. However, it offers many extensions allowing to easily add functionalities.

Flask offers the following features:

  • Development server and debugger
  • Simplifies writing unit tests
  • Template engine for HTML rendering
  • Supports secure cookies (session)
  • Fully compatible with WSGI 1.0
  • Based on Unicode
  • Complete documentation
  • Easy to deploy on multiple hosts
  • Add features via extensions


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