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An asynchronous task queue with priority support.

Project description

An asynchronous task queue with priority support.

from wcpan.worker import AsyncQueue, Task


class HighPriorityTask(Task):

    @property
    def priority(self) -> int:
        return 2


class LowPriorityTask(Task):

    @property
    def priority(self) -> int:
        return 1


# Note this queue is non-preemptive.
queue = AsyncQueue()
queue.start()

# function_2 will come first.
queue.post(LowPriorityTask(function_1))
queue.post(HighPriorityTask(function_2))

# cancel pending tasks
queue.flush()

# wait for executing task (if any) ends, then stop the queue
await queue.stop()

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