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Posted to user@beam.apache.org by Joey Tran <jo...@schrodinger.com> on 2025/01/24 22:16:39 UTC

[python] Does python SDK support typechecking of NewTypes?

Hey all,

Does the python sdk support type checking with python NewTypes? e.g. if you
specify `UserId = NewType("UserId", str)`, and a transform expects UserIDs,
will it fail if gets a pcollection of strs?

My tests say no, but I just wanted to double check. If not, are there plans
to?

Re: [python] Does python SDK support typechecking of NewTypes?

Posted by Joey Tran <jo...@schrodinger.com>.

Nevermind, I see now it is not implemented and it is tracked by this issue:
https://github.com/apache/beam/issues/20076

On Fri, Jan 24, 2025 at 5:16 PM Joey Tran <jo...@schrodinger.com> wrote:

> Hey all,
>
> Does the python sdk support type checking with python NewTypes? e.g. if
> you specify `UserId = NewType("UserId", str)`, and a transform expects
> UserIDs, will it fail if gets a pcollection of strs?
>
> My tests say no, but I just wanted to double check. If not, are there
> plans to?
>