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prefect.concurrency.v1.sync

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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) -> Generator[None, 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.
• task_run_id: The task run ID acquiring the limits.
• timeout_seconds: The number of seconds to wait to acquire the limits before raising a TimeoutError. A timeout of None will wait indefinitely.

Raises:

• TimeoutError: If the limits are not acquired within the given timeout.

Example: A simple example of using the sync concurrency context manager:

from prefect.concurrency.v1.sync import concurrency

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

def main():
    resource_heavy()