1. 18
  1.  

  2. 7

    Yikes. If I read this correctly, it could really screw up FastAPI. That would be a serious headache for me, in a way that’s far worse than the breakage I normally expect from a “3.9” -> “3.10” transition.

    1. 2

      Could you explain what breakage points do you expect for FastAPI with those changes that may impact Pydantic?

      1. 6

        FastAPI uses pydantic for data validation. By my read of this issue, if PEP 563 happens without PEP 649, the code I write will see data that’s not been validated the way I expect it to. If my code treats data that hasn’t been validated as if it has, I’m gonna have a bad time.