class_docstr: Helper abc which defines all methods a ParallelBackend must implement
class_docstr_tok: ["Helper","abc","which","defines","all","methods","a","ParallelBackend","must","implement"]
docstr: Reconfigure the backend and return the number of workers.
  
  This makes it possible to reuse an existing backend instance for
  successive independent calls to Parallel with different parameters.
code: def configure(self, n_jobs=1, parallel=None, **backend_args):
      """Reconfigure the backend and return the number of workers.
  
      This makes it possible to reuse an existing backend instance for
      successive independent calls to Parallel with different parameters.
      """
      self.parallel = parallel
      return self.effective_n_jobs(n_jobs)
  
imports: import gc
  import os
  import sys
  import warnings
  import threading
  from abc import ABCMeta, abstractmethod
  from .format_stack import format_exc
  from .my_exceptions import WorkerInterrupt, TransportableException
  from ._multiprocessing_helpers import mp
  from ._compat import with_metaclass
label_desc: Use image node_id 3 for calling the ParallelBackendBase obj's underlying member method code with example usage: obj.configure(n_jobs, parallel) and returns: self