Hi Flyte folks, does the Optional type has to be defined like this

@task
def hello(username: Optional[str]) -> str:

because i tried to define like this

@task
def hello(username: str | None) -> str:

but getting

Failed with Unknown Exception <class 'AssertionError'> Reason: Failed to Bind variable username for function sandbox.subworkflow.hello.

first one works though

I've also seen this same thing 😢

Optional[str]

is the right way to annotate; have you been encountering any issues?

Python 3.10 allows str l None

@Eduardo Apolinario (eapolinario), is this something we can support in flytekit?

as Greg said, this is a python 3.10 feature described in https://peps.python.org/pep-0604/. We'll have to investigate how to handle this version-specific typing info. It might be doable. Can you create a ticket to track this investigation?