code: def atomic_write_string_to_file(filename, contents, overwrite):
    
    temp_pathname = (tf.compat.as_bytes(filename) +
                     tf.compat.as_bytes(".tmp") +
                     tf.compat.as_bytes(uuid.uuid4().hex))
    with tf_v1.gfile.GFile(temp_pathname, mode="w") as f:
      f.write(contents)
    try:
      tf_v1.gfile.Rename(temp_pathname, filename, overwrite)
    except tf.errors.OpError:
      tf_v1.gfile.Remove(temp_pathname)
      raise
docs: Writes to `filename` atomically.
  
    This means that when `filename` appears in the filesystem, it will contain
    all of `contents`. With write_string_to_file, it is possible for the file
    to appear in the filesystem with `contents` only partially written.
  
    Accomplished by writing to a temp file and then renaming it.
  
    Args:
      filename: string, pathname for a file
      contents: string, contents that need to be written to the file
      overwrite: boolean, if false it's an error for `filename` to be occupied by
        an existing file.