Pascal Jahan Elahi (Pawsey)
01/20/2025, 3:39 AMMarvin
01/20/2025, 3:39 AMasyncio.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:
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.