🔒 Pythonic way of returning multiple success/failure results? | Python | Page 1

fast fog Mar 9, 2024, 10:33 PM

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I have a function that needs to perform some batch API calls. Some of these API calls may succeed and some may fail. Regardless, the caller function (that calls this function) needs to gather the results (which succeeded and which did not). What's the best / Pythonic way of doing this? Using exception? exception group? or just plain tuple returns?

Additionally, if I want to make the API calls async, what's the best way to return the (success/fail) results as the API calls are finished? Using yield?

wary jewelBOT Mar 9, 2024, 10:33 PM

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fast fog I have a function that needs to perform some batch API calls. Some of these API ...

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@fast fog

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fast fog Mar 9, 2024, 10:36 PM

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Pythonic way for function to return multiple success/failure results?

placid siren Mar 9, 2024, 10:40 PM

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so you want to deliver the results in an unordered fashion, each one as soon as they're completed?

fast fog Mar 9, 2024, 10:42 PM

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placid siren so you want to deliver the results in an unordered fashion, each one as soon as ...

I began with asyncio.gather() them before I return the results, but then I realized yes, maybe it's better to return them as they are done

placid siren Mar 9, 2024, 10:43 PM

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maybe you want this then? https://docs.python.org/3/library/asyncio-task.html#asyncio.as_completed

Python documentation

Coroutines and Tasks

This section outlines high-level asyncio APIs to work with coroutines and Tasks. Coroutines, Awaitables, Creating Tasks, Task Cancellation, Task Groups, Sleeping, Running Tasks Concurrently, Eager ...

dreamy musk Mar 9, 2024, 10:57 PM

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Probably you want a TaskGroup and a Queue

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Put results in the Queue and let failures raise

fast fog Mar 9, 2024, 11:05 PM

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dreamy musk Put results in the Queue and let failures raise

Do you think it makes sense to put the failures into a Queue as well?

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And let the function returns 2 Queues to the caller?

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I am not sure how to handle multiple exceptions asynchronously

fast fog Mar 9, 2024, 11:09 PM

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placid siren maybe you want this then? https://docs.python.org/3/library/asyncio-task.html#as...

Probably a dumb question, but if the results are returned in an unordered fashion, how can I link some other info of the calls with the call results, since I no longer know which is which?

oblique shore Mar 9, 2024, 11:38 PM

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fast fog Do you think it makes sense to put the failures into a Queue as well?

what exactly do you want to do with the results?

fast fog Mar 9, 2024, 11:43 PM

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oblique shore what exactly do you want to do with the results?

I guess saving all the results, whether success or not, for later auditing. And have them printed to a file.

oblique shore Mar 9, 2024, 11:50 PM

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in that case I would just have the task print them

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no need so "save" anything

wary jewelBOT Mar 10, 2024, 12:50 AM

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#🔒 Pythonic way of returning multiple success/failure results?