<@ULVA73B9P>, how can I use asyncio.create_task wi...
# ask-marvin
p
@Marvin, how can I use asyncio.create_task with a task.submit() to use asyncio.wait function?
m
To use
asyncio.create_task
with
task.submit()
and
asyncio.wait
, you'll need to handle Prefect's asynchronous task execution and Python's asyncio capabilities. Here’s a concise guide on how to achieve that: 1. Submit the Task: Use
task.submit()
to submit your task. This returns a future object that you can work with asynchronously. The
submit
function can take parameters and dependencies. 2. Create an Async Task: Use
asyncio.create_task()
to create a task from the future's coroutine. This is necessary to integrate with the asyncio event loop. 3. Use asyncio.wait: Finally, you can use
asyncio.wait()
to wait for the completion of the asyncio tasks you've created. Here's a simple example:
Copy code
python
import asyncio
from prefect import task, flow

@task
async def my_task(x):
    return x * 2

@flow
async def my_flow():
    # Submit the task
    future = my_task.submit(10)

    # Create an asyncio task
    async_task = asyncio.create_task(future.result())

    # Wait for the task to complete
    done, pending = await asyncio.wait([async_task])

    for task in done:
        print(task.result())

asyncio.run(my_flow())
### Key Points: - Prefect Future:
task.submit()
returns a future object that can be awaited. - Asyncio Integration: Use
asyncio.create_task
to manage the future within an asyncio context. - Waiting:
asyncio.wait
allows you to wait for multiple asyncio tasks. For more details, you can refer to the Prefect Task Runners documentation.