code: def _get_gs_path():
      
      path = os.environ.get("PATH", os.defpath)
  
      for dir in path.split(os.pathsep):
          for name in ("gs", "gs.exe", "gswin32c.exe"):
              g = os.path.join(dir, name)
              if os.path.exists(g):
                  return g
      raise Exception("Ghostscript not found. path=%s" % str(path))
docs: Guess where the Ghostscript executable is
      and return its absolute path name.