code: def get_machid():
      """Get (mostly) unique machine ID.
  
      Returns
      -------
      ids : array (length 2, int32)
          The machine identifier used in MNE.
      """
      mac = b"%012x" % uuid.getnode()  # byte conversion for Py3
      mac = re.findall(b"..", mac)  # split string
      mac += [b"00", b"00"]  # add two more fields
  
      # Convert to integer in reverse-order (for some reason)
      from codecs import encode
  
      mac = b"".join([encode(h, "hex_codec") for h in mac[::-1]])
      ids = np.flipud(np.frombuffer(mac, np.int32, count=2))
      return ids
  
imports: import os.path
  import re
  import time
  import uuid
  from contextlib import contextmanager
  from gzip import GzipFile
  import numpy
  from scipy.sparse import csc_matrix, csr_matrix
  from ..utils import _file_like, _validate_type, logger
  from ..utils.numerics import _cal_to_julian
  from .constants import FIFF
label_desc: Use image node_id 21 for calling a global function with example usage: get_machid() and returns: ids