code: def inspect_workers(self):
          
          workers = tuple(self.workers.values())
          expired = tuple(w for w in workers if not w.is_alive())
  
          for worker in expired:
              self.workers.pop(worker.pid)
  
          return ((w.pid, w.exitcode) for w in expired if w.exitcode != 0)
docs: Updates the workers status.
  
          Returns the workers which have unexpectedly ended.