metric_ops_test.py 文件源码

def testValueTensorIsIdempotent(self):
    predictions = random_ops.random_normal((10, 3), seed=1)
    labels = random_ops.random_normal((10, 3), seed=2)
    error, update_op = metrics.streaming_mean_absolute_error(predictions,
                                                             labels)

    with self.test_session() as sess:
      sess.run(variables.local_variables_initializer())

      # Run several updates.
      for _ in range(10):
        sess.run(update_op)

      # Then verify idempotency.
      initial_error = error.eval()
      for _ in range(10):
        self.assertEqual(initial_error, error.eval())