code: def write_keyring(path, key, uid=-1, gid=-1):
      
      # Note that we *require* to avoid deletion of the temp file
      # otherwise we risk not being able to copy the contents from
      # one file system to the other, hence the `delete=False`
      tmp_file = tempfile.NamedTemporaryFile('wb', delete=False)
      tmp_file.write(key)
      tmp_file.close()
      keyring_dir = os.path.dirname(path)
      if not path_exists(keyring_dir):
          makedir(keyring_dir, uid, gid)
      shutil.move(tmp_file.name, path)
docs: create a keyring file