code: def paramiko_tunnel(
      lport: int,
      rport: int,
      server: str,
      remoteip: str = "127.0.0.1",
      keyfile: str | None = None,
      password: str | None = None,
      timeout: float = 60,
  ) -> Process:
      """launch a tunner with paramiko in a subprocess. This should only be used
      when shell ssh is unavailable (e.g. Windows).
  
      This creates a tunnel redirecting `localhost:lport` to `remoteip:rport`,
      as seen from `server`.
  
      If you are familiar with ssh tunnels, this creates the tunnel:
  
      ssh server -L localhost:lport:remoteip:rport
  
      keyfile and password may be specified, but ssh config is checked for defaults.
  
  
      Parameters
      ----------
  
      lport : int
          local port for connecting to the tunnel from this machine.
      rport : int
          port on the remote machine to connect to.
      server : str
          The ssh server to connect to. The full ssh server string will be parsed.
          user@server:port
      remoteip : str [Default: 127.0.0.1]
          The remote ip, specifying the destination of the tunnel.
          Default is localhost, which means that the tunnel would redirect
          localhost:lport on this machine to localhost:rport on the *server*.
  
      keyfile : str; path to public key file
          This specifies a key to be used in ssh login, default None.
          Regular default ssh keys will be used without specifying this argument.
      password : str;
          Your ssh password to the ssh server. Note that if this is left None,
          you will be prompted for it if passwordless key based login is unavailable.
      timeout : int [default: 60]
          The time (in seconds) after which no activity will result in the tunnel
          closing.  This prevents orphaned tunnels from running forever.
  
      """
      if paramiko is None:
          msg = "Paramiko not available"  # type:ignore[unreachable]
          raise ImportError(msg)
  
      if password is None and not _try_passwordless_paramiko(
          server, keyfile
      ):
          password = getpass("%s's password: " % (server))
  
      p = Process(
          target=_paramiko_tunnel,
          args=(lport, rport, server, remoteip),
          kwargs={"keyfile": keyfile, "password": password},
      )
      p.daemon = True
      p.start()
      return p
  
imports: from __future__ import annotations
  import atexit
  import os
  import re
  import signal
  import socket
  import sys
  import warnings
  from getpass import getpass, getuser
  from multiprocessing import Process
  from typing import Any, cast
label_desc: Use image node_id 10 for calling a global function with example usage: paramiko_tunnel(lport, rport, server, remoteip, keyfile, password, timeout) and returns: p