#1757 Add is none function Pull request opened by pingsutw TL;DR Add support

is_none

in the condition Type ☐ Bug Fix ☑︎ Feature ☐ Plugin Are all requirements met? ☑︎ Code completed ☑︎ Smoke tested ☐ Unit tests added ☐ Code documentation added ☐ Any pending items have an associated Issue Complete description

import random
import typing
from flytekit import conditional, task, workflow


@task
def coin_toss(seed: int) -> typing.Optional[bool]:
    r = random.Random(seed)
    if r.random() < 0.5:
        return True
    return None


@task
def failed() -> int:
    return -1


@task
def success() -> int:
    return 0


@workflow
def wf(seed: int = 5) -> int:
    result = coin_toss(seed=seed)
    return conditional("test").if_(result.is_none()).then(success()).else_().then(failed())


if __name__ == '__main__':
    wf()

Tracking Issue flyteorg/flyte#3514 Follow-up issue NA OR https://github.com/flyteorg/flyte/issues/ flyteorg/flytekit ✅ All checks have passed 30/30 successful checks