code: def __enter__(self):
      with model.get_db_provider(self.config):
          pass
      self.p = None
      if self.wm:
          self.logger.debug("Spinning up cloud workers")
          if self.use_spot:
              self.wm.start_spot_workers(
                  self.queue_name,
                  self.bid,
                  self.resources_needed,
                  start_workers=self.num_workers,
                  queue_upscaling=self.queue_upscaling,
                  ssh_keypair=self.ssh_keypair,
                  timeout=self.cloud_timeout,
              )
          else:
              for i in range(self.num_workers):
                  self.wm.start_worker(
                      self.queue_name,
                      self.resources_needed,
                      ssh_keypair=self.ssh_keypair,
                      timeout=self.cloud_timeout,
                  )
  
      elif self.queue_name is None or self.queue_name == "local":
          self.logger.debug("Starting local worker")
          self.p = subprocess.Popen(
              [
                  "studio-local-worker",
                  "--verbose=%s" % self.config["verbose"],
                  "--timeout=" + str(self.cloud_timeout),
              ],
              close_fds=True,
          )
  
      # yet another case is when queue name is specified, but
      # cloud is not - that means running on a separately
      # managed server that listens to the queue
      #
      # The contract is queue_name that starts with sqs or ec2
      # is an SQS queue, otherwise, it is a PubSub queue
  
      return self
  
imports: import os
  import subprocess
  import uuid
  import pickle
  import tempfile
  import re
  import six
  import time
  from studio import experiment_submitter, model, fs_tracker, logs
  from studio.util import rsync_cp, parse_verbosity
  from studio.experiment import create_experiment
label_desc: Use image node_id 2 for calling the CompletionService obj's underlying member method code with example usage: obj.__enter__() and returns: self