@Marvin is it possible to create dependencies between subflows?

Yes, you can create dependencies between subflows in Prefect. In Prefect 3.x, subflows can be orchestrated such that a parent flow can manage the execution order of its subflows. This is often done by using the

flow

decorator to define a flow, and then calling one flow from within another. The parent flow can wait for a subflow to complete before proceeding, effectively creating a dependency. Here's a basic example:

python
from prefect import flow

@flow
def subflow_1():
    print("Running Subflow 1")

@flow
def subflow_2():
    print("Running Subflow 2")

@flow
def parent_flow():
    subflow_1()
    subflow_2()

parent_flow()

In this example,

subflow_1

will run before

subflow_2

because they are called in sequence inside

parent_flow

. This is a simple way to manage dependencies between subflows. For more detailed information, you can refer to the Prefect documentation. If you have specific requirements or a more complex scenario, feel free to share.

@Marvin this does not create a dependency line in the prefect server ui. is it possible to add a dependency line?

Creating a visible dependency line between subflows in the Prefect server UI requires explicit task dependencies. However, Prefect's UI primarily visualizes task dependencies within a single flow, not between separate subflows. To achieve a visual representation of dependencies, you would typically need to manage dependencies at the task level within a single flow. Prefect's

visualize_task_dependencies

function can help visualize task dependencies if tasks are interconnected within a flow. For further details, you can explore the Prefect documentation. If you need more specific guidance on how to structure your flows to visualize dependencies, feel free to provide more context.