runtimequestion 380 Threading & Multiprocessing · hard
Retry failed jobs through an executor
A geocoding service fails now and then. Write run_with_retries(executor, func, items, attempts): submit every item, collect results, then resubmit only the items that failed, up to attempts rounds in total. Return (results, failed): results for every item that eventually worked, and the sorted items that failed in every round.
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Function
run_with_retries(executor, func, items, attempts)Roundsround 1 submits every item; each later round submits only the items whose latest attempt raised; at most
attempts roundsReturns
(results, failed): a dictionary item → result, and a sorted list of items that never succeededRulewithin a round, submit every item before reading any result