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Join Stack Overflow to learn, share knowledge, and build your career. Connect and All In One Woodworking Machine For Sale share knowledge within a single location that is structured and easy to search. I'm creating huge array of permutations with replacement product and it demands so much time for computation. Let's use simple function like this one:. I'm simply not sure how to split this function into multiple processes using "Pool" class or similar.

I have never used multiprocessing in Python and I'd like to ask for help. Too big divided by 4 is still Too big. Heed unutbu's comment: It would take forever divided by 4 doing it with multiprocessing. Stack Overflow for Teams — Collaborate and share knowledge with all in one wood tools python private group.

Create a free Team What is Teams? Learn more. Python itertools multiprocessing Ask Question. Asked all in one wood tools python years, 11 months ago. Active 4 years, 11 months ago. Viewed 1k times. Let's use All In One Wood Tools Keys simple function like this one: def permutations li : return [p for p in itertools.

Any hints? Have you looked into the multiprocessing module? This is not so easy. You'll have to split this job in chunks or make each thread or process generate its own permutations — ForceBru Apr 17 '16 at Why do you need them all in a list?

You can yield one value at a time. That's too large for any normal computer to handle. Even if your machine could generate a billion permutations a second, it would still take over years to enumerate them all. I would say look for greedy approximation of your task first before going distributed. Show 5 more comments. Active Oldest Votes.

Pool 4 as workers: workers. Nailed it — Mai Apr 17 '16 at Add a comment. Sign up all in one wood tools python log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog.

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