Fix tf.reverse.

Author: Oceania2018

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

@@ -162,14 +162,17 @@ public Tensor transpose<T1>(T1 a, Axis perm = null, string name = "transpose", b
         /// Reverses specific dimensions of a tensor.
         /// </summary>
         /// <param name="tensor"></param>
-        /// <param name="axis"></param>
+        /// <param name="axis">The indices of the dimensions to reverse. Must be in the range [-rank(tensor), rank(tensor)).</param>
         /// <param name="name"></param>
         /// <returns></returns>
-        public Tensor reverse(Tensor tensor, int[] axis, string name = null)
-            => gen_array_ops.reverse(tensor, ops.convert_to_tensor(axis), name: name);
-
-        public Tensor reverse(Tensor tensor, Tensor axis, string name = null)
-            => gen_array_ops.reverse(tensor, axis, name: name);
+        public Tensor reverse(Tensor tensor, Axis axis, string name = null)
+        {
+            if (axis.IsScalar)
+            {
+                axis = new Axis(axis.axis);
+            }
+            return array_ops.reverse(tensor, axis, name: name);
+        }
 
         /// <summary>
         /// Returns the rank of a tensor.

src/TensorFlowNET.Core/Operations/array_ops.cs

@@ -413,6 +413,16 @@ public static Tensor reshape(Tensor tensor, object[] shape, string name = null)
             return gen_array_ops.reshape(tensor, dims, name: name);
         }
 
+        public static Tensor reverse(Tensor tensor, Tensor axis, string name = null)
+            => tf.Context.ExecuteOp("ReverseV2", name, new ExecuteOpArgs(tensor, axis)
+            {
+                GetGradientAttrs = (op) => new
+                {
+                    T = op.get_attr<TF_DataType>("T"),
+                    Tidx = op.get_attr<TF_DataType>("Tidx")
+                }
+            });
+
         private static Tensor ones_like_impl<T>(T tensor, TF_DataType dtype, string name, bool optimize = true)
         {
             return tf_with(ops.name_scope(name, "ones_like", new { tensor }), scope =>
@@ -658,19 +668,17 @@ public static Tensor tile(Tensor input, Tensor multiples, string name = null)
                 }
             });
 
-        public static Tensor tile(Tensor input, object[] multiples, string name = null)
+        /*public static Tensor tile(Tensor input, Shape multiples, string name = null)
         {
-            Shape dims = shape_utils.from_object_array(multiples);
-
-            return tf.Context.ExecuteOp("Tile", name, new ExecuteOpArgs(input, dims)
+            return tf.Context.ExecuteOp("Tile", name, new ExecuteOpArgs(input, multiples)
             {
                 GetGradientAttrs = (op) => new
                 {
                     T = op.get_attr<TF_DataType>("T"),
                     Tmultiples = op.get_attr<TF_DataType>("Tmultiples")
                 }
             });
-        }
+        }*/
 
         public static Tensor zeros_like(Tensor tensor, TF_DataType dtype = TF_DataType.DtInvalid, string name = null, bool optimize = true)
         {

test/TensorFlowNET.UnitTest/ManagedAPI/ArrayOpsTest.cs

@@ -2,6 +2,7 @@
 using Tensorflow.NumPy;
 using Tensorflow;
 using static Tensorflow.Binding;
+using System.Linq;
 
 namespace TensorFlowNET.UnitTest.ManagedAPI
 {
@@ -92,5 +93,17 @@ public void TensorArray()
             Assert.AreEqual(ta.read(1).numpy(), 20f);
             Assert.AreEqual(ta.read(2).numpy(), 30f);
         }
+
+        /// <summary>
+        /// https://www.tensorflow.org/api_docs/python/tf/reverse
+        /// </summary>
+        [TestMethod]
+        public void ReverseArray()
+        {
+            var a = tf.random.normal((2, 3));
+            var b = tf.reverse(a, -1);
+            Assert.IsTrue(Equal(a[0].ToArray<float>().Reverse().ToArray(), b[0].ToArray<float>()));
+            Assert.IsTrue(Equal(a[1].ToArray<float>().Reverse().ToArray(), b[1].ToArray<float>()));
+        }
     }
 }