code: def _jupyter_abspath(subcommand: str) -> str:
      """This method get the abspath of a specified jupyter-subcommand with no
      changes on ENV.
      """
      # get env PATH with self
      search_path = os.pathsep.join(_path_with_self())
      # get the abs path for the jupyter-<subcommand>
      jupyter_subcommand = f"jupyter-{subcommand}"
      abs_path = which(jupyter_subcommand, path=search_path)
      if abs_path is None:
          msg = f"\nJupyter command `{jupyter_subcommand}` not found."
          raise Exception(msg)
  
      if not os.access(abs_path, os.X_OK):
          msg = f"\nJupyter command `{jupyter_subcommand}` is not executable."
          raise Exception(msg)
  
      return abs_path
  
imports: from __future__ import annotations
  import argparse
  import errno
  import json
  import os
  import site
  import sys
  import sysconfig
  from pathlib import Path
  from shutil import which
  from subprocess import Popen
  from typing import Any
  from .None import paths
  from .version import __version__
label_desc: Use image node_id 4 for calling a global function with example usage: _jupyter_abspath(subcommand) and returns: abs_path