learning_test.py 文件源码

def testTrainWithNoInitAssignCanAchieveZeroLoss(self):
    with tf.Graph().as_default():
      tf.set_random_seed(0)
      tf_inputs = tf.constant(self._inputs, dtype=tf.float32)
      tf_labels = tf.constant(self._labels, dtype=tf.float32)

      tf_predictions = LogisticClassifier(tf_inputs)
      slim.losses.log_loss(tf_predictions, tf_labels)
      total_loss = slim.losses.get_total_loss()

      optimizer = tf.train.GradientDescentOptimizer(learning_rate=1.0)

      train_op = slim.learning.create_train_op(total_loss, optimizer)

      loss = slim.learning.train(
          train_op, self._logdir, number_of_steps=300, log_every_n_steps=10)
      self.assertIsNotNone(loss)
      self.assertLess(loss, .015)