code: def get_backend():
      """Return backend"""
      return _BACKEND
  
imports: from __future__ import print_function
  import os
  import sys
  import shutil
  import tempfile
  import warnings
  import sysconfig
  import subprocess
  from multiprocessing import current_process
  import numpy
label_desc: Use image node_id 4 for calling a global function with example usage: get_backend() and returns: _BACKEND