Merge pull request #272 from bpietroiu/Issue-CnnTextClassification

CnnTextClassification debugging

src/TensorFlowNET.Core/Train/AdamOptimizer.cs

@@ -70,5 +70,12 @@ namespace Tensorflow.Train
             return (_get_non_slot_variable("beta1_power", graph: graph),
                 _get_non_slot_variable("beta2_power", graph: graph));
         }
+
+        public override void _prepare()
+        {
+            //copied from GradientDescentOptimizer
+            LearningRate = _call_if_callable(LearningRate);
+            LearningRateTensor = ops.convert_to_tensor(LearningRate, name: "learning_rate");
+        }
     }
 }

test/TensorFlowNET.Examples/TextProcess/CnnTextClassification.cs

@@ -57,10 +57,10 @@ namespace TensorFlowNET.Examples
             //int classes = y.Data<int>().Distinct().Count();
             //int samples = len / classes;
             int train_size = (int)Math.Round(len * (1 - test_size));
-            var train_x = x[new Slice(stop: train_size), new Slice()];
-            var valid_x = x[new Slice(start: train_size), new Slice()];
-            var train_y = y[new Slice(stop: train_size)];
-            var valid_y = y[new Slice(start: train_size)];
+            train_x = x[new Slice(stop: train_size), new Slice()];
+            valid_x = x[new Slice(start: train_size), new Slice()];
+            train_y = y[new Slice(stop: train_size)];
+            valid_y = y[new Slice(start: train_size)];
             Console.WriteLine("\tDONE");
             return (train_x, valid_x, train_y, valid_y);
         }
@@ -135,7 +135,8 @@ namespace TensorFlowNET.Examples
             {
                 // delete old cached file which contains errors
                 Console.WriteLine("Discarding cached file: " + meta_path);
-                File.Delete(meta_path);
+                if(File.Exists(meta_path))
+                    File.Delete(meta_path);
             }
             var url = "https://raw.githubusercontent.com/SciSharp/TensorFlow.NET/master/graph/" + meta_file;
             Web.Download(url, "graph", meta_file);

test/TensorFlowNET.UnitTest/ExamplesTests/ExamplesTest.cs

@@ -91,6 +91,15 @@ namespace TensorFlowNET.ExamplesTests
             new TextClassificationTrain() { Enabled = true, DataLimit=100 }.Run();
         }
 
+
+        [TestMethod]
+        public void CnnTextClassificationTrain()
+        {
+            tf.Graph().as_default();
+            new CnnTextClassification() { Enabled = true, IsImportingGraph = false }.Run();
+        }
+
+
         [Ignore]
         [TestMethod]
         public void TextClassificationWithMovieReviews()