code: def _node(default=""):
      """Helper to determine the node name of this machine."""
      try:
          import socket
      except ImportError:
          # No sockets...
          return default
      try:
          return socket.gethostname()
      except OSError:
          # Still not working...
          return default
  
imports: import collections
  import os
  import re
  import sys
  import functools
  import itertools
label_desc: Use image node_id 14 for calling a global function with example usage: _node(default) and returns: socket, default, default