class_docstr: MPI-based asynchronous executor.
class_docstr_tok: ["MPI-based","asynchronous","executor","."]
code: def _bootstrap(self):
      if self._pool is None:
          self._pool = self._make_pool(self)
  
imports: import sys
  import time
  import functools
  import itertools
  import threading
  from ._base import Future
  from ._base import Executor
  from ._base import as_completed
  from .None import _core
label_desc: Use image node_id 2 for calling the MPIPoolExecutor obj's underlying member method code with example usage: obj._bootstrap() without return types