1import multiprocessing 2 3multiprocessing.Lock() 4 5 6def f(): 7 print("ok") 8 9 10if __name__ == "__main__": 11 ctx = multiprocessing.get_context("forkserver") 12 modname = "test.mp_preload" 13 # Make sure it's importable 14 __import__(modname) 15 ctx.set_forkserver_preload([modname]) 16 proc = ctx.Process(target=f) 17 proc.start() 18 proc.join() 19