code: def _run_cmdline(command):
      # runs a shell command
      p = _Popen(args=command, stdout=_PIPE, stderr=_PIPE, shell=True)
      stdout_feed, stderr_feed = p.communicate()  # wait for completion
      exit_code = p.poll()
      return (exit_code, stdout_feed, stderr_feed)
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import json
  import os
  import sys
  from tempfile import mkstemp
  from subprocess import Popen
  from subprocess import PIPE
label_desc: Use image node_id 3 for calling a global function with example usage: _run_cmdline(command) and returns: exit_code,  stdout_feed,  stderr_feed