runtimequestion 378 Threading & Multiprocessing · medium
Check jobs before sending them to processes
A batch system sends jobs to a process pool, and a job that can't be pickled fails only after the pool has started. Write a pre-flight check unsendable(jobs) that tries to pickle each job and returns the positions of the ones that can't be sent.
Read and diagnose: this can't run in the browser, so you'll read real code and output and answer questions about it.
Function
unsendable(jobs)Returnsa list of the indexes of jobs for which
pickle.dumps raises, in orderRulecatch the errors pickling raises for such objects (
pickle.PicklingError, TypeError, AttributeError); don't stop at the first failure