From 31a106dc23083207c3082a80fe726505edb39d18 Mon Sep 17 00:00:00 2001
From: Juanu Haedo <juanu@juanu.com.ar>
Date: Wed, 1 May 2019 19:48:30 -0300
Subject: [PATCH 1/3] Added get_tensor_by_name to the Graph class

---
 src/TensorFlowNET.Core/Graphs/Graph.cs | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/TensorFlowNET.Core/Graphs/Graph.cs b/src/TensorFlowNET.Core/Graphs/Graph.cs
index f1a33371..adfbfcb9 100644
--- a/src/TensorFlowNET.Core/Graphs/Graph.cs
+++ b/src/TensorFlowNET.Core/Graphs/Graph.cs
@@ -388,7 +388,7 @@ namespace Tensorflow
                 var handle = return_oper_handle.node + Marshal.SizeOf<TF_Operation>() * i;
                 return_opers[i] = new Operation(*(IntPtr*)handle);
             }
-
+            
             return return_opers;
         }
 
@@ -439,6 +439,18 @@ namespace Tensorflow
             c_api.TF_DeleteGraph(_handle);
         }
 
+        /// <summary>
+        /// Returns the <see cref="Tensor"/> with the given <paramref name="name"/>.
+        /// This method may be called concurrently from multiple threads.
+        /// </summary>
+        /// <param name="name">The name of the `Tensor` to return.</param>
+        /// <exception cref="KeyError">If <paramref name="name"/> does not correspond to a tensor in this graph.</exception>
+        /// <returns>The `Tensor` with the given <paramref name="name"/>.</returns>
+        public ITensorOrOperation get_tensor_by_name(string name)
+        {
+            return this.as_graph_element(name, allow_tensor: true, allow_operation: false);
+        }
+
         public void __enter__()
         {
         }

From c654c6bc61363d22d48d06172a119ba6ab087e05 Mon Sep 17 00:00:00 2001
From: Juanu Haedo <juanu@juanu.com.ar>
Date: Wed, 1 May 2019 21:06:47 -0300
Subject: [PATCH 2/3] - Changed return value of get_tensor_by_name

---
 src/TensorFlowNET.Core/Graphs/Graph.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/TensorFlowNET.Core/Graphs/Graph.cs b/src/TensorFlowNET.Core/Graphs/Graph.cs
index adfbfcb9..ab228c47 100644
--- a/src/TensorFlowNET.Core/Graphs/Graph.cs
+++ b/src/TensorFlowNET.Core/Graphs/Graph.cs
@@ -446,9 +446,9 @@ namespace Tensorflow
         /// <param name="name">The name of the `Tensor` to return.</param>
         /// <exception cref="KeyError">If <paramref name="name"/> does not correspond to a tensor in this graph.</exception>
         /// <returns>The `Tensor` with the given <paramref name="name"/>.</returns>
-        public ITensorOrOperation get_tensor_by_name(string name)
+        public Tensor get_tensor_by_name(string name)
         {
-            return this.as_graph_element(name, allow_tensor: true, allow_operation: false);
+            return (Tensor)this.as_graph_element(name, allow_tensor: true, allow_operation: false);
         }
 
         public void __enter__()

From eb4475c9bc39d2f88d859f292f935e897eaf8c4f Mon Sep 17 00:00:00 2001
From: Juanu Haedo <juanu@juanu.com.ar>
Date: Wed, 1 May 2019 21:09:26 -0300
Subject: [PATCH 3/3] Added GLOBAL_STEP GraphKey

---
 src/TensorFlowNET.Core/ops.GraphKeys.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/TensorFlowNET.Core/ops.GraphKeys.cs b/src/TensorFlowNET.Core/ops.GraphKeys.cs
index 9e1e72f2..7babae11 100644
--- a/src/TensorFlowNET.Core/ops.GraphKeys.cs
+++ b/src/TensorFlowNET.Core/ops.GraphKeys.cs
@@ -35,6 +35,8 @@ namespace Tensorflow
 
             public static string TRAIN_OP = "train_op";
 
+            public static string GLOBAL_STEP = GLOBAL_STEP = "global_step";
+
             public static string[] _VARIABLE_COLLECTIONS = new string[] { "variables", "trainable_variables" }; 
             /// <summary>
             /// Key to collect BaseSaverBuilder.SaveableObject instances for checkpointing.