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prefect.concurrency.v1.asyncio

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Functions

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concurrency 

concurrency(names: Union[str, list[str]], task_run_id: UUID, timeout_seconds: Optional[float] = None) -> AsyncGenerator[None, None]
A context manager that acquires and releases concurrency slots from the given concurrency limits. Args:
  • names: The names of the concurrency limits to acquire slots from.
  • task_run_id: The name of the task_run_id that is incrementing the slots.
  • timeout_seconds: The number of seconds to wait for the slots to be acquired before raising a TimeoutError. A timeout of None will wait indefinitely.
Raises:
  • TimeoutError: If the slots are not acquired within the given timeout.
Example: A simple example of using the async concurrency context manager: 
from prefect.concurrency.v1.asyncio import concurrency

async def resource_heavy():
    async with concurrency("test", task_run_id):
        print("Resource heavy task")

async def main():
    await resource_heavy()