code: def have_unpaper():
      try:
          unpaper.version()
      except Exception:  # pylint: disable=broad-except
          return False
      return True
  
imports: from __future__ import annotations
  import platform
  import sys
  from pathlib import Path
  from subprocess import CompletedProcess, run
  import pytest
  from ocrmypdf import api, pdfinfo
  from ocrmypdf._exec import unpaper
  from ocrmypdf._plugin_manager import get_parser_options_plugins
  from ocrmypdf.exceptions import ExitCode
label_desc: Use image node_id 4 for calling a global function with example usage: have_unpaper() and returns: True, False