貌似只能在eval的时候打印
auc,auc_op = tf.metrics.auc(labels=labels, predictions=tf.sigmoid(logits))
if mode == tf.estimator.ModeKeys.EVAL:
eval_metrics = {"auc":(auc,auc_op)}
output_spec = tf.estimator.EstimatorSpec(
mode=mode,
loss=total_loss,
eval_metric_ops=eval_metrics)