[GitHub] [airflow] uranusjr commented on issue #19884: Type hinted `@task` decorated functions to create typed XComs

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uranusjr commented on issue #19884:
URL: https://github.com/apache/airflow/issues/19884#issuecomment-982338581


   This may be possible in the future, but I wouldn’t recommend doing this right now. Python core devs’ official stance on type hints, at least at the current time, is that they are merely hints and should not be relied on by runtime logic. The last people that do this kind of thing extensively—Pydantic and FastAPI—caused a big drama when PEP 563 was _almost_ released in 3.10 and needed to be reverted at the last minute. I have a lot of thoughts on all the things related to this, but the short version is I would hate Airflow to become such projects. At the very leat, we should wait until the runtime aspects of type hints are discussed, decided on, and implemented, before making an effort toward related features.


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