updating Tensorflow versioning

Author: zkaoudi

wayang-platforms/wayang-tensorflow/src/main/java/org/apache/wayang/tensorflow/model/TensorflowModel.java

@@ -22,10 +22,7 @@
 import org.apache.wayang.basic.model.op.Input;
 import org.apache.wayang.basic.model.op.Op;
 import org.apache.wayang.basic.model.optimizer.Optimizer;
-import org.tensorflow.Graph;
-import org.tensorflow.Operand;
-import org.tensorflow.Session;
-import org.tensorflow.Tensor;
+import org.tensorflow.*;
 import org.tensorflow.ndarray.*;
 import org.tensorflow.ndarray.index.Indices;
 import org.tensorflow.op.Ops;
@@ -122,14 +119,12 @@ void train(XT x, YT y, int epoch, int batchSize) {
                     if (accuracyCalculation != null) {
                         runner.fetch(accuracyCalculation.getName());
                     }
-                    List<Tensor> ret = runner.run();
-                    try (TFloat32 loss = (TFloat32) ret.get(0)) {
+                    try (Result ret = runner.run()) {
+                        TFloat32 loss = (TFloat32) ret.get(0);
                         System.out.printf("[epoch %d, batch %d] loss: %f ", i + 1, start / batchSize + 1, loss.getFloat());
-                    }
-                    if (accuracyCalculation != null) {
-                        try (TFloat32 acc = (TFloat32) ret.get(1)) {
-                            System.out.printf("accuracy: %f ", acc.getFloat());
-                        }
+
+                        TFloat32 acc = (TFloat32) ret.get(1);
+                        System.out.printf("accuracy: %f ", acc.getFloat());
                     }
                     System.out.println();
                 }