code: def get_connection_hash(
      hostname,
      port="",
      username="",
      identity_file="",
      bundled=None,
      force_ip=False,
  ):
      """Generate a hash based on SSH connection properties
  
      This can be used for generating filenames that are unique
      to a connection from and to a particular machine (with
      port and login username). The hash also contains the local
      host name.
  
      Identity file corresponds to a file that will be passed via ssh's -i
      option.
  
      All parameters correspond to the respective properties of an SSH
      connection, except for `bundled`, which is unused.
  
      .. deprecated:: 0.16
         The ``bundled`` argument is ignored.
      """
      if bundled is not None:
          import warnings
  
          warnings.warn(
              "The `bundled` argument of `get_connection_hash()` is ignored. "
              "It will be removed in a future release.",
              DeprecationWarning,
          )
      # returning only first 8 characters to minimize our chance
      # of hitting a limit on the max path length for the Unix socket.
      # Collisions would be very unlikely even if we used less than 8.
      # References:
      #  https://github.com/ansible/ansible/issues/11536#issuecomment-153030743
      #  https://github.com/datalad/datalad/pull/1377
  
      # The "# nosec" below skips insecure hash checks by 'codeclimate'. The hash
      # is not security critical, since it is only used as an "abbreviation" of
      # the unique connection property string.
      return md5(  # nosec
          "{lhost}{rhost}{port}{identity_file}{username}{force_ip}".format(
              lhost=gethostname(),
              rhost=hostname,
              port=port,
              identity_file=identity_file,
              username=username,
              force_ip=force_ip or "",
          ).encode(
              "utf-8"
          )
      ).hexdigest()[:8]
  
imports: import fasteners
  import os
  import logging
  from socket import gethostname
  from hashlib import md5
  from subprocess import Popen
  import tempfile
  import threading
  from datalad.utils import quote_cmdlinearg
  from datalad.support.exceptions import CapturedException, CommandError, ConnectionOpenFailedError
  from datalad.support.external_versions import external_versions
  from datalad.utils import auto_repr, Path, ensure_list, on_windows
  from datalad.cmd import NoCapture, StdOutErrCapture, WitlessRunner
  from ..None import cfg
label_desc: Use image node_id 1 for calling a global function with example usage: get_connection_hash(hostname, port, username, identity_file, bundled, force_ip) and returns: md5