code: def find_bookmark_file ():
      
      try:
          dirname = get_profile_dir()
          if os.path.isdir(dirname):
              for name in OperaBookmarkFiles:
                  fname = os.path.join(dirname, name)
                  if os.path.isfile(fname):
                      return fname
      except Exception:
          pass
      return u""
docs: Return the bookmark file of the Opera profile.
      Returns absolute filename if found, or empty string if no bookmark file
      could be found.