Flyte enables production-grade orchestration for machine learning workflows and data processing created to accelerate local workflows to production.

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Hi what should be the return type hint for a file or pickle file? Looks like in python, file type annotation should be `typing.TextIO` or `typing.BinaryIO` but not sure what they should be for flyte?

You should use <https://docs.flyte.org/projects/flytekit/en/latest/generated/flytekit.types.file.FlyteFile.html#flytekit.types.file.FlyteFile>

Hi <@U0265RTUJ5B> thanks - the docs say to use python 3 type hints though. What is the difference?

<@U03APPBC2SC>, sorry I missed this notification.
First, give <https://docs.flyte.org/en/latest/concepts/data_management.html#data-movement> a read. Essentially FlyteFile has a few advantages:
1. it abstracts away the work to upload/download a file, 
2. it integrates with other portions of the Flyte programming model, e.g. shell tasks (i.e. you can pass flytefile as an input of a shelltask)
3. You can use the Flyte type system to capture the extension of your flytefile. For example, a task that returns `FlyteFile[csv]` cannot be used as an input to a task that takes a `FlyteFile[png]` as a parameter.
4. If you use the python type hints Flyte will simply pickle the file.

Thanks for the explanation - I’ll def check out the docs you sent!