In Python, how can I asynchronously await a FutureResult (returned from matlab.engine.start_matlab with background=True)?

Todd

2024 3 22

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In Python, I would like to be able to do something like this, within an async coroutine:

future_result = matlab.engine.start_matlab(background=True)
await future_result.wait()

As far as I can tell, the future_result.result() method will block until the result is ready, so that will not suffice. I could implement the async await with extra code like

await asyncio.get_running_loop().run_in_executor(
    None, lambda: matlab.engine.start_matlab(background=True)
)

but it would be nice to have it built-in.

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Manikanta Aditya 2024-3-22

You can use the asyncio library’s wrap_future function to convert a concurrent.futures. Future object into an asyncio.Future object. This allows you to use the await keyword with it.

Todd 2024-4-1

编辑：Todd 2024-4-1

Thanks fot the suggestion, @Manikanta Aditya. Unfortunately, the matlab.engine.futureresult.FutureResult class returned by start_matlab does not appear to be related to the concurrent.futures.Future class required by wrap_future.

AssertionError: concurrent.futures.Future is expected, got <matlab.engine.futureresult.FutureResult object at 0x7fa65172b100>

(Pdb) result = matlab.engine.start_matlab(background=True)

(Pdb) result.__class__.mro()

[<class 'matlab.engine.futureresult.FutureResult'>, <class 'object'>]

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