Handling Child Error in Python Multiprocessing with Nested Function

Question

I want to write a function in Python 3.6 with multiprocessing, where workers execute a function

def f(x):
   .
   .

in such a way that every time an error is raised in the child process, that child process should restart.

This is my code:

for worker in workers:
 def nested(worker):
  try:
   `proc=multiprocessing.Process(target=f,\
     args=(args[worker],))
    proc.start()
   except:
      nested(worker)
 nested(worker)

The problem is that this structure does not catch the error in the child process, so it does not work as intended. Unfortunately, the solutions in Python Multiprocessing: Handling Child Errors in Parent are very specific to the problem in that thread and cannot really be applied here.

Does anyone have an idea how to fix this?

Answer 1

With the help of @zwer, I got this to work:

def nested(args):
    try:
        f(args)
    except:
        nested(args)

for worker in workers:
    proc=multiprocessing.Process(target=nested,\
                    args=args[worker])
    proc.start()

Just beware that this structure does only work on Unix systems, for Windows, you need to put the function in a separate file.