ByteString #479

src/TensorFlowNET.Core/Sessions/_FetchHandler.cs

@@ -86,6 +86,9 @@ namespace Tensorflow
                             case NPTypeCode.Char:
                                 full_values.Add(float.NaN);
                                 break;
+                            case NPTypeCode.Byte:
+                                full_values.Add(float.NaN);
+                                break;
                             default:
                                 throw new NotImplementedException($"build_results tensor_values[0] {tensor_values[0].dtype.Name}");
                         }

src/TensorFlowNET.Core/Tensors/dtypes.cs

@@ -138,7 +138,7 @@ namespace Tensorflow
                     dtype = TF_DataType.TF_INT8;
                     break;
                 case "Byte":
-                    dtype = TF_DataType.TF_UINT8;
+                    dtype = dtype ?? TF_DataType.TF_UINT8;
                     break;
                 case "Int16":
                     dtype = TF_DataType.TF_INT16;

src/TensorFlowNET.Core/Tensors/tensor_util.cs

@@ -18,6 +18,7 @@ using NumSharp;
 using System;
 using System.Linq;
 using NumSharp.Utilities;
+using System.Text;
 
 namespace Tensorflow
 {
@@ -256,7 +257,7 @@ namespace Tensorflow
                     nd = np.array(doubleVals);
                     break;
                 case string strVal:
-                    nd = NDArray.FromString(strVal);
+                    nd = new NDArray(Encoding.ASCII.GetBytes(strVal));
                     break;
                 case string[] strVals:
                     nd = strVals;

src/TensorFlowNET.Core/Training/Saving/Saver.cs

@@ -19,6 +19,7 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Text;
 using static Tensorflow.Binding;
 
 namespace Tensorflow
@@ -188,10 +189,12 @@ namespace Tensorflow
 
                 if (write_state)
                 {
+                    var path = UTF8Encoding.UTF8.GetString((byte[])model_checkpoint_path[0]);
+                    _RecordLastCheckpoint(path);
                     _RecordLastCheckpoint(model_checkpoint_path[0].ToString());
                     checkpoint_management.update_checkpoint_state_internal(
                         save_dir: save_path_parent,
-                        model_checkpoint_path: model_checkpoint_path[0].ToString(),
+                        model_checkpoint_path: path,
                         all_model_checkpoint_paths: _last_checkpoints.Keys.Select(x => x).ToList(),
                         latest_filename: latest_filename,
                         save_relative_paths: _save_relative_paths);
@@ -205,7 +208,7 @@ namespace Tensorflow
                 export_meta_graph(meta_graph_filename, strip_default_attrs: strip_default_attrs, save_debug_info: save_debug_info);
             }
 
-            return _is_empty ? string.Empty : model_checkpoint_path.ToString();
+            return _is_empty ? string.Empty : UTF8Encoding.UTF8.GetString((byte[])model_checkpoint_path[0]);
         }
 
         public (Saver, object) import_meta_graph(string meta_graph_or_file, 

test/TensorFlowNET.UnitTest/SessionTest.cs

@@ -109,7 +109,7 @@ namespace TensorFlowNET.UnitTest
                 var c = tf.strings.substr(a, 4, 8);
                 using (var sess = tf.Session())
                 {
-                    var result = (string) c.eval(sess);
+                    var result = UTF8Encoding.UTF8.GetString((byte[])c.eval(sess));
                     Console.WriteLine(result);
                     result.Should().Be("heythere");
                 }