Hi, is it possible to have a `typing.Optional` input to a workflow? ```@workflow def wf(foo: Optiona...

shy-evening-51366

01/17/2024, 11:03 AM

Hi, is it possible to have a

typing.Optional

input to a workflow?

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@workflow
def wf(foo: Optional[str]):
    ...

gives me:

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Missing option '--foo'.

glamorous-carpet-83516

01/17/2024, 11:05 AM

yes, try

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@workflow
def wf(foo: Optional[str] = None):
    ...

shy-evening-51366

01/17/2024, 11:06 AM

Ah sorry I simplified my example a bit too much, I’m using:

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def wf(foo: Optional[list[str]] = None):

shy-evening-51366

01/17/2024, 11:06 AM

Should I use a different default?

shy-evening-51366

01/17/2024, 11:12 AM

When trying

[]

instead of `None`:

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Invalid value for '--foo': Failed to convert param <Option foo>, [] to typing.Optional[typing.List[str]]

shy-evening-51366

01/17/2024, 11:15 AM

Adding any string to the list and using that as default seems to work, not the prettiest but can progress with that 🙂 :

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def wf(foo: Optional[list[str]] = [""]):

glamorous-carpet-83516

01/17/2024, 11:18 AM

odd. might creating a issue for it. [flyte-bug]

👍 1

user

01/17/2024, 11:18 AM

kind-helicopter-24858

03/21/2024, 3:59 PM

Was a bug created for this? I'm encountering the same issue.

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Flyte

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