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Comment by timojeajea | Hacker News Reader

One major advantage Flask has over FastAPI is maturity. FastAPI has 1000+ open issues on Github vs 14 for Flask. That is quite scary.

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It's interesting the see the number of open issues of popular python projects:

Pytorch, 8400

Pandas, 3400

Tensorflow, 2100

jupyter notebook, 2000

scikit-learn, 1500

pytest, 720

requests, 170

The outlier seem to be Flask.

You picked mainly data science python projects. It would make more sense to compare with other python web frameworks.

django, 1101 open, 32662 closed

cherrypy, 218 open, 1505 closed

starlette, 31 open, 570 closed

pyramid, 70 open, 966 closed

falcon, 168 open, 789 closed

flask, 14 open, 2318 closed

fastapi, 1044 open, 1855 closed

Fast api has one of the worst ratio regarding open/closed issues.

I wanted to add django but their issues aren't on github as they are using their own system. IMO an external issue tracker lead to a higher barrier to create new issues, so this isn't not necessary fair.

Also fastapi allows people to ask questions with the issues. On the 1000+ open issues, 826 are tagged as question.

It's hard to find a fair metric. Open/close ratio rewards older project with fluctuating/stable popularity. Fastapi popularity is still growing[0], so having some difficulties to work on issues is expected.

[0] -- https://trends.google.com/trends/explore?date=today%205-y&q=...

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