code: def get_id_of_running_docker(container_name):
      """Returns ID of running docker container."""
      return shell_call(
          [
              DOCKER_BINARY,
              "ps",
              "-q",
              "--filter=name={}".format(container_name),
          ]
      ).strip()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from builtins import int
  import argparse
  import json
  import logging
  import os
  import random
  import shutil
  import subprocess
  import time
  import uuid
  from six import iteritems
  import eval_lib
  from cleverhans.utils import shell_call
label_desc: Use image node_id 3 for calling a global function with example usage: get_id_of_running_docker(container_name) and returns: shell_call