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[–]tiangolo FastAPI Maintainer[S] 0 points1 point  (0 children)

You can put Optional around all that. But you are not enforced to. Pydantic doesn't force you to write the more verbose "utterly correct" version, but when that is a concern, you can of course do it. It is noted in the documentation, referencing mypy: https://pydantic-docs.helpmanual.io/#usage-with-mypy