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

Flyte

Hello All,

I have a workflow which takes a date parameter as a string. This workflow has a task which needs `date -1` as input.

So when I use `datetime.strptime(date.get(), "%Y-%m-%d") - datetime.timedelta(days=1)` , Flyte throws *`'Promise' object has no attribute 'get'`* error.

Using `datetime.strptime(date, "%Y-%m-%d") - datetime.timedelta(days=1)` throws `strptime() argument 1 must be str, not Promise` error.

Any idea how to handle this isse?

```@workflow 
my_workflow(date: str, name: str) -&gt; bool:
      yesterday = str(datetime.strptime(date.get(), "%Y-%m-%d") - datetime.timedelta(days=1))
      my_task(yesterday)

@task
my_task(yesterday: str):
   # task related code```

Could you move the date manipulation to `my_task`? `date` and `name` in the workflow are promises, and the values will be materialized only in a task.

This task is being used by other workflows and tasks as well so if I change this task then it will affect all other workflow, need to make the change at many points.

it's sorted now :slightly_smiling_face: we just created a separate task where we can manipulate the dates.