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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_graph():
 """Creates a graph from saved GraphDef file and returns a saver."""

  # Creates graph from saved graph_def.pb.
  with tf.gfile.FastGFile(os.path.join(
      FLAGS.model_dir, 'classify_image_graph_def.pb'), 'rb') as f:
    graph_def = tf.GraphDef()
    graph_def.ParseFromString(f.read())
    _ = tf.import_graph_def(graph_def, name='')