code: def open_tunnel(
      addr: str,
      server: str,
      keyfile: str | None = None,
      password: str | None = None,
      paramiko: Any = None,
      timeout: int = 60,
  ) -> tuple[str, int]:
      """Open a tunneled connection from a 0MQ url.
  
      For use inside tunnel_connection.
  
      Returns
      -------
  
      (url, tunnel) : (str, object)
          The 0MQ url that has been forwarded, and the tunnel object
      """
  
      lport = select_random_ports(1)[0]
      _, addr = addr.split("://")
      ip, rport = addr.split(":")
      rport_int = int(rport)
      paramiko = (
          sys.platform == "win32"
          if paramiko is None
          else paramiko_tunnel
      )
      tunnelf = paramiko_tunnel if paramiko else openssh_tunnel
  
      tunnel = tunnelf(
          lport,
          rport_int,
          server,
          remoteip=ip,
          keyfile=keyfile,
          password=password,
          timeout=timeout,
      )
      return "tcp://127.0.0.1:%i" % lport, cast(int, tunnel)
  
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 6 for calling a global function with example usage: open_tunnel(addr, server, keyfile, password, paramiko, timeout) and returns: unknown,  cast