Q:

Example of using hylang with python multiprocessing

I am looking for an example of using python multiprocessing (i.e. a process-pool/threadpool, job queue etc.) with hylang.

A:

The first example from the multiprocessing documentation can be literally translated to Hy like so:
(import [multiprocessing [Pool]])

(defn f [x]
  (* x x))

(when (= __name__ "__main__")
  (with [p (Pool 5)]
    (print (.map p f [1 2 3]))))

