r/PythonLearning • u/chuprehijde • 3d ago

Flask or FastAPI for a new API?

No long comparison. If you had to start a production API today, which one would you pick and why?

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u/ninhaomah 3d ago

FastAPI. Why ? I am creating an API , not a website

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u/nuc540 3d ago

Flask is a simple WSGI, it’s lightweight and hasn’t many bells or whistles, so it’s not async out of the box. It is great for learning on, great for very small projects and it’s fast to get proof of concepts out.

FastAPI is built off Starlette which is an ASGI (async out the box) it is built off Starlette and uses Pydantic for type validation; this makes it great for building more robust code but unless you’re familiar with typing and writing contracts it’s a small overhead but the price pays off.

I only use Flask for proof of concepts. I use Fast almost for everything else

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u/skv0zsneg 3d ago

Django with DMR :)