I dont understand this example from the Docs; isn’t

flow

only defined inside that contexthandler/`with` statement?

from prefect import task, Flow

@task
def say_hello():
    print("Hello, world!")

with Flow("Run Me") as flow:
    h = say_hello()

flow.run() # prints "Hello, world!"

I’m getting the following

NameError: name 'flow' is not defined

I just run your code and it worked fine

[2020-10-23 19:42:19] INFO - prefect.FlowRunner | Beginning Flow run for 'Run Me'
[2020-10-23 19:42:19] INFO - prefect.TaskRunner | Task 'say_hello': Starting task run...
Hello, world!
[2020-10-23 19:42:19] INFO - prefect.TaskRunner | Task 'say_hello': finished task run for task with final state: 'Success'
[2020-10-23 19:42:19] INFO - prefect.FlowRunner | Flow run SUCCESS: all reference tasks succeeded

Please check your environment

This tripped me up at first too... @Joseph Haaga, the name

flow

exists outside of the

with

block. The resource which is aliased as

flow

is "open" for the duration of the

with

block, and "closed" upon exiting the

with

block, but the object itself persists and can have methods called.

ahh, didn’t know it was still around even after

__exit__()

gets called; interesting - thanks!