1  import multiprocessing
       2  
       3  multiprocessing.Lock()
       4  
       5  
       6  def f():
       7      print("ok")
       8  
       9  
      10  if __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()