How to build a parallel job runner in Python, one library at a time

Automated excerpt

Without it you must pass a list like ["echo", "hello"], and "echo hello" fails with FileNotFoundError because it looks for a program literally named echo hello. capture_output=True puts the output on the result object. Futures are hashable, so use them as dict keys: Read that inside-out: submit the job, get a future, store future -> name. The s suffix means string. dumps/loads work with strings, dump/load work with file objects.

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