Add global_seed to context

Author: Sebastian-roko

src/TensorFlowNET.Core/APIs/tf.random.cs

@@ -93,7 +93,12 @@ public Tensor random_shuffle(Tensor value, int? seed = null, string name = null)
             => random_ops.random_shuffle(value, seed: seed, name: name);
 
         public void set_random_seed(int seed)
-            => ops.get_default_graph().seed = seed;
+        {
+            if (executing_eagerly())
+                Context.set_global_seed(seed);
+            else
+                ops.get_default_graph().seed = seed;
+        }
 
         public Tensor multinomial(Tensor logits, int num_samples, int? seed = null,
             string name = null, TF_DataType output_dtype = TF_DataType.DtInvalid)

src/TensorFlowNET.Core/Contexts/Context.cs

@@ -42,6 +42,8 @@ public sealed partial class Context : IDisposable
         SafeContextHandle _handle;
         public SafeContextHandle Handle => _handle;
 
+        int? _seed;
+
         public Context()
         {
             _device_policy = ContextDevicePlacementPolicy.DEVICE_PLACEMENT_SILENT;
@@ -71,6 +73,12 @@ public void ensure_initialized()
             initialized = true;
         }
 
+        public void set_global_seed(int? seed)
+            => _seed = seed;
+
+        public int? global_seed()
+            => _seed;
+
         public void start_step()
             => c_api.TFE_ContextStartStep(_handle);
 

src/TensorFlowNET.Core/Framework/random_seed.py.cs

@@ -14,6 +14,8 @@ You may obtain a copy of the License at
    limitations under the License.
 ******************************************************************************/
 
+using static Tensorflow.Binding;
+
 namespace Tensorflow
 {
     public class random_seed
@@ -22,8 +24,18 @@ public class random_seed
 
         public static (int?, int?) get_seed(int? op_seed = null)
         {
+            int? global_seed;
+
+            if (tf.executing_eagerly())
+                global_seed = tf.Context.global_seed();
+            else
+                global_seed = ops.get_default_graph().seed;
+
+            if (global_seed.HasValue)
+                return (global_seed, op_seed);
+
             if (op_seed.HasValue)
-                return (DEFAULT_GRAPH_SEED, 0);
+                return (DEFAULT_GRAPH_SEED, op_seed);
             else
                 return (null, null);
         }