Hi there! I’d like to use the

RenameFlowRun

prefect task to rename my flow based on a value in the context. I noticed that if I try something like:

rename_flow = RenameFlowRun(flow_name=f"{prefect.context.today}")

It tries to evaluate the context at deploy time, instead of at runtime. Is there a reasonable way to do this? @Rob Douglas ended up just pulling the guts out of the

run()

method of

RenameFlowRun

and putting it in a task. That works, but it seems a bit dodgy. PS - the documentation for this is wrong, as the example shows importing

FlowRenameTask

instead of

RenameFlowRun

Could you think that example? So stuff in the Flow block and these

init

are executed immediately so even if you did something like

datetime.datetime.now()

it would be persisted during build. The way around this is to create a function that returns

prefect.context.today

so that it executes during runtime. And then I think you want,

with Flow(...) as flow:
     RenameFlowRun()(flow_name=functioncall())

that’s interesting - so this:

with Flow(...) as flow:
     RenameFlowRun()(flow_name=prefect.context.today)

Wouldn’t work because the arguments are evaluated at deploy time correct?

Yes that’s right, but really to can just wrap it in a lambda too

yep - that makes sense - will give that a try - thanks!

That will yeah. If you want it to be 1, I think maybe try using a function instead of a task and see if it works. If not, you probably need to modify the task, but modifying the tasks in our task library is not bad practice btw. A lot of people do it. Specifically, you can subclass it and add a few lines then call

super.run()

.