numerical programming package for the Python programming language
NumPy (pronounced /ˈnʌmpaɪ/ NUM-py) is a library for the Python programming language, adding support for large, multi-dimensional arrays and matrices, along with a large collection of high-level mathematical functions to operate on … Wikipedia
Factsheet
Original author Travis Oliphant
Developer Community project
Initial release As Numeric, 1995 (1995); as NumPy, 2006 (2006)
Factsheet
Original author Travis Oliphant
Developer Community project
Initial release As Numeric, 1995 (1995); as NumPy, 2006 (2006)
🌐
NumPy
numpy.org
NumPy
PerformantThe core of NumPy is well-optimized C code. Enjoy the flexibility of Python with the speed of compiled code.
🌐
FastAPI
fastapi.tiangolo.com
FastAPI
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python based on standard Python type hints.
Discussions

Framework to use for backend
There is Django for more classical websites (and it can do APIs), then Flask and FastAPI. Each unique/specific in style. Python overall is popular on the job market, often used to make APIs for JS SPAs, mobile apps and alike. More on reddit.com
🌐 r/Python
117
May 14, 2024
What backend frameworks are you using in 2025?
.NET Core (C#). It pays my bills. More on reddit.com
🌐 r/AskProgramming
123
26
May 16, 2025
Is fastapi best python framework for backend ?
Backend is not alway an API. So yes and no. More on reddit.com
🌐 r/PythonLearning
9
5
November 6, 2025
What Python Frameworks do you use?
the right one for the problem at hand. Not everything needs to be an api. Not every data should be a json or csv. More on reddit.com
🌐 r/devops
43
25
August 6, 2024
🌐
Reflex
reflex.dev
Reflex · The platform to build and scale enterprise apps
Generate and refine UI and backend in 100% Python. No JavaScript or frontend frameworks required · Over 100+ integrations are available. Reflex AI finds the best way to implement new features and fix your code.
🌐
Harvard University
pll.harvard.edu › course › cs50s-web-programming-python-and-javascript
CS50's Web Programming with Python and JavaScript | Harvard University
June 13, 2018 - This course picks up where CS50 leaves off, diving more deeply into the design and implementation of web apps with Python, JavaScript, and SQL using frameworks like Django, React, and Bootstrap.
🌐
Streamlit
streamlit.io
Streamlit • A faster way to build and share data apps
🎈Join the Streamlit virtual meetup, April 28th @9am PT, for best practices on building apps with AI! Turn your data scripts into shareable web apps in minutes. All in pure Python. No front‑end experience required. Get startedTry the live playground! ... Streamlit is an open-source app framework that is a breeze to get started with.
Find elsewhere
🌐
Ultivic
ultivic.com › blogs › top-python-backend-frameworks
Top Python Backend Frameworks: How to Choose the Right One for Your Project | Ultivic
October 17, 2024 - These backend frameworks are essential tools in a developer’s toolkit, and picking the right one for your project can make all the difference. In this article, we’ll explore the top Python backend frameworks and how to select the best one for your next big project.
🌐
Python
python.org
Welcome to Python.org
The official home of the Python Programming Language
🌐
iCert Global
icertglobal.com › blog › top-4-python-backend-frameworks-for-ai-projects-2025
The top 4 Python backend frameworks for building entry level AI projects | iCert Global
December 19, 2025 - Discover the best Python backend frameworks for AI. A deep dive into FastAPI, Flask, Django, and Sanic for professionals building intelligent systems.
🌐
DigitalAPI
digitalapi.ai › blogs › top-backend-frameworks-your-guide-to-choosing-the-best
Top Backend Frameworks: Your Guide to Choosing the Best
February 25, 2026 - 3. Node.js (Express, NestJS) excels in real-time applications and microservices with its non-blocking I/O and JavaScript ecosystem. 4. Python (Django, Flask) is favored for rapid development, data science integrations, and readability, suitable ...
🌐
Apriorit
apriorit.com › home › blog › software development blog › best python framework for backend development: django vs. flask vs. tornado
Python Backend Frameworks Comparison With Examples - Apriorit
August 26, 2025 - At Apriorit, we have used all popular ... knowledge in this article, focusing on three popular Python backend frameworks: Flask, Django, and Tornado....
🌐
LangChain
langchain.com
LangChain: Observe, Evaluate, and Deploy Reliable AI Agents
Improve agent performance across the development lifecycle. Trace your preferred framework or integrate LangSmith with any agent stack using our Python, TypeScript, Go, or Java SDKs.
🌐
Reflex
reflex.dev › blog › top-python-web-frameworks
Best Python Web Frameworks 2026 Compared
January 9, 2026 - Selecting the right Python framework depends on your specific requirements, the type of application you're building, project complexity, and your preferred development approach. Reflex is an excellent option for building interactive, full-stack applications entirely in Python, seamlessly handling both frontend and backend. Django suits larger projects requiring comprehensive features and tools, providing everything needed for complex backend operations. Flask works best for smaller projects or microservices where flexibility and a lightweight footprint are priorities.
🌐
W3Schools
w3schools.com › python
Python Tutorial
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
🌐
Pieces
pieces.app › home
The top 4 Python backend frameworks for building entry level AI projects
Pieces for Developers – Long-Term Memory Agent
Choose the best Python backend framework for your needs by exploring their pros, cons and specific features. Let's jump in! Pieces is your AI long-term memory agent that captures live context from browsers to IDEs and tools, manages snippets, and supports multiple LLMs. This app has dramatically improved my workflow!
Rating: 5 ​
🌐
GitHub
github.com › vinta › awesome-python
GitHub - vinta/awesome-python: An opinionated list of Python frameworks, libraries, tools, and resources · GitHub
February 20, 2026 - An opinionated guide to the best Python frameworks, libraries, tools, and resources. pyr: Zero-config Python project manager. Bootstraps its own runtime, app-convention, and working imports - out the box. The #10 most-starred repo on GitHub. Put your product in front of Python developers. Become a sponsor. ... Libraries for building AI applications, LLM integrations, and autonomous agents. ... django-ai-plugins - Django backend ...
Starred by 295K users
Forked by 27.8K users
Languages   Python 62.8% | CSS 17.6% | HTML 10.3% | JavaScript 8.9% | Makefile 0.4%
🌐
Django
djangoproject.com
The web framework for perfectionists with deadlines | Django
The web framework for perfectionists with deadlines. Menu ... Django makes it easier to build better web apps more quickly and with less code. ... Get 💸✨30%✨💸 off a new or renewal annual PyCharm Professional license while supporting the Django Software Foundation. 🎁 Now includes renewals, and every purchase helps fund the DSF. Get PyCharm for 30% off · Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design.
🌐
Stack Overflow
survey.stackoverflow.co › 2025 › technology
Technology | 2025 Stack Overflow Developer Survey
The +5 point increase for FastAPI is one of the most significant shifts in the web framework space. This signals a strong trend towards using Python for building performant APIs and reflects the overall strength of the Python ecosystem.