code: def __init__(
      self,
      auth_cookie=None,
      verbose=10,
      branch=None,
      user_startup_script=None,
  ):
      self.startup_script_file = os.path.join(
          os.path.dirname(__file__), "scripts/ec2_worker_startup.sh"
      )
  
      self.install_studio_script = os.path.join(
          os.path.dirname(__file__), "scripts/install_studio.sh"
      )
  
      self.client = boto3.client("ec2")
      self.asclient = boto3.client("autoscaling")
      self.cwclient = boto3.client("cloudwatch")
  
      self.region = self.client._client_config.region_name
  
      self.logger = logs.get_logger("EC2WorkerManager")
      self.logger.setLevel(verbose)
      self.auth_cookie = auth_cookie
  
      self.prices = self._get_ondemand_prices(_instance_specs.keys())
  
      self.repo_url = git_util.get_my_repo_url()
      self.branch = (
          branch if branch else git_util.get_my_checkout_target()
      )
      self.user_startup_script = user_startup_script
  
      if user_startup_script:
          self.logger.warn("User startup script argument is deprecated")
  
imports: import uuid
  import os
  import base64
  import json
  import yaml
  import six
  import filelock
  import hashlib
  import pickle
  from studio import git_util
  from studio.util import logs
  from studio.storage import storage_util
  from studio.util.gpu_util import memstr2int
  from .cloud_worker_util import insert_user_startup_script
label_desc: Use image node_id 1 to create a new EC2WorkerManager object from inherited base classes: object with example: obj = EC2WorkerManager(auth_cookie, verbose, branch, user_startup_script)