import tensorflow as tf

    with self.test_session(graph=tf.Graph()) as sess:
      # Creates a graph.
      v0 = tf.Variable(10.0, name="v0")
      v1 = tf.Variable(11.0, name="v1")
      # Creates 2 savers.
      saver0 = tf.train.Saver({"v0": v0}, name="saver0")
