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To run a nested flow within another flow in Prefect 3.x with conditional logic, you can use the following approach: 1. Define Your Flows: Create both the parent and nested flows. You can define them in separate modules and import them as needed. 2. Conditional Execution: Use Python's conditional statements to determine when to run the nested flow. This can be done within the parent flow. 3. Run the Nested Flow: Use the

run_deployment

method to execute the nested flow conditionally. This approach is recommended if you need to manage the flow runs independently. Here's a basic example to illustrate these steps:

python
from prefect import flow, task
from prefect.deployments import run_deployment

@task
def condition_check():
    # Replace this with actual logic
    return True

@flow
def nested_flow():
    print("Running nested flow")

@flow
def parent_flow():
    if condition_check():
        run_deployment("nested-flow-deployment-name")

if __name__ == "__main__":
    parent_flow()

- Observability: Nested flows have first-class observability within the Prefect UI and Prefect Cloud, allowing you to monitor their status independently. - Parameters: You can pass parameters to the nested flow for different use cases. For more detailed information, you can refer to the Prefect documentation on writing flows.