class_docstr: Pool using MPI processes as workers.
docstr: Wait for the worker processes to exit.
docstr_tok: ["Wait","for","the","worker","processes","to","exit","."]
code: def join(self):
      """Wait for the worker processes to exit."""
      self.executor.shutdown(wait=True)
      _async_executor_shutdown(self)
  
imports: from os import cpu_count
  import functools
  import operator
  import threading
  import warnings
  import weakref
  from ..None import futures
label_desc: Use image node_id 14 for calling the Pool obj's underlying member method code with example usage: obj.join() without return types