@Marvin, how can I use asyncio.Event to pause a asynchronous task till in one subflow wait till a task in another subflow has completed?

Pausing an asynchronous task in one subflow until a task in another subflow is completed can be a bit tricky, but it's certainly doable within Prefect and ControlFlow. In Prefect, while you can't suspend subflows independently of their parent flow runs, you can manage flow runs and task dependencies by using

pause_flow_run

or

suspend_flow_run

. These functions allow you to pause or suspend entire flow runs, although the use of

asyncio.Event

isn't explicitly documented for this purpose. Here's a link with more details: Prefect Documentation on Pause/Resume. On the ControlFlow side, managing task dependencies and asynchronous tasks is relatively more straightforward. You can establish task dependencies using the

depends_on

parameter, which ensures that one task waits for another to complete before it starts. Additionally, ControlFlow allows you to define complex task hierarchies and dependencies automatically, enabling seamless orchestration of tasks. You can check more details here: ControlFlow Patterns for Running Tasks and ControlFlow Dependencies. While asyncio is a Python-native way to handle concurrency, combining Prefect's orchestration capabilities and ControlFlow's task dependency management might save you some headaches. After all, there's no need to recreate the wheel when there's a perfectly good car already built! If you have any other specific scenarios or queries, feel free to ask!