From 3d611cb9f877cfa350528bd95f6e49c7af9c4e14 Mon Sep 17 00:00:00 2001
From: Meinrad Recheis <meinrad.recheis@gmail.com>
Date: Sun, 10 May 2020 12:43:12 +0200
Subject: [PATCH 1/4] added GetPyNone() to Runtime

---
 src/runtime/runtime.cs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/runtime/runtime.cs b/src/runtime/runtime.cs
index 3d1fe2d39..9d6be9277 100644
--- a/src/runtime/runtime.cs
+++ b/src/runtime/runtime.cs
@@ -473,6 +473,19 @@ private static void ResetPyMembers()
         internal static IntPtr PyNone;
         internal static IntPtr Error;
 
+        public static PyObject _none;
+        public static PyObject GetPyNone()
+        {
+            if (_none == null)
+            {
+                var result = Runtime.PyNone;
+                Runtime.XIncref(result);
+                _none= new PyObject(result);
+            }
+
+            return _none;
+        }
+
         /// <summary>
         /// Check if any Python Exceptions occurred.
         /// If any exist throw new PythonException.

From a3066e08d8e42e805ed818575f7be0b8042e2121 Mon Sep 17 00:00:00 2001
From: Meinrad Recheis <meinrad.recheis@gmail.com>
Date: Wed, 22 May 2019 08:48:30 +0200
Subject: [PATCH 2/4] pyobject: added IsNone()

---
 src/runtime/pyobject.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/runtime/pyobject.cs b/src/runtime/pyobject.cs
index 96968e678..491c62e30 100644
--- a/src/runtime/pyobject.cs
+++ b/src/runtime/pyobject.cs
@@ -979,6 +979,10 @@ public bool IsTrue()
             return Runtime.PyObject_IsTrue(obj) != 0;
         }
 
+        /// <summary>
+        /// Return true if the object is None
+        /// </summary>
+        public bool IsNone() => CheckNone(this) == null;
 
         /// <summary>
         /// Dir Method

From a66610aa5e191a94a227427764444b5e75fff872 Mon Sep 17 00:00:00 2001
From: Meinrad Recheis <meinrad.recheis@gmail.com>
Date: Sun, 10 May 2020 12:58:35 +0200
Subject: [PATCH 3/4] Added Runtime.GetPyNone() and PyObject.IsNone()

---
 AUTHORS.md   | 1 +
 CHANGELOG.md | 1 +
 2 files changed, 2 insertions(+)

diff --git a/AUTHORS.md b/AUTHORS.md
index b0d1f0c91..19cd4f5ed 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -45,6 +45,7 @@
 -   Luke Stratman ([@lstratman](https://github.com/lstratman))
 -   Konstantin Posudevskiy ([@konstantin-posudevskiy](https://github.com/konstantin-posudevskiy))
 -   Matthias Dittrich ([@matthid](https://github.com/matthid))
+-   Meinrad Recheis ([@henon](https://github.com/henon))
 -   Mohamed Koubaa ([@koubaa](https://github.com/koubaa))
 -   Patrick Stewart ([@patstew](https://github.com/patstew))
 -   Raphael Nestler ([@rnestler](https://github.com/rnestler))
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f754cbc4e..90d909e00 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
 -   Added support for Jetson Nano.
 -   Added support for __len__ for .NET classes that implement ICollection
 -   Added PythonException.Format method to format exceptions the same as traceback.format_exception
+-   Added GetPyNone() to Runtime and IsNone() to PyObject
 
 ### Changed
 

From f5b32f4e4ac42e97e9b0b402511cea9878572b3b Mon Sep 17 00:00:00 2001
From: Meinrad Recheis <meinrad.recheis@gmail.com>
Date: Sun, 10 May 2020 22:25:59 +0200
Subject: [PATCH 4/4] Added Runtime.None which returns a reference to None to
 be able to pass it into Python from .NET

---
 CHANGELOG.md           |  3 ++-
 src/runtime/runtime.cs | 13 +++++--------
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 90d909e00..13baf557e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,8 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
 -   Added support for Jetson Nano.
 -   Added support for __len__ for .NET classes that implement ICollection
 -   Added PythonException.Format method to format exceptions the same as traceback.format_exception
--   Added GetPyNone() to Runtime and IsNone() to PyObject
+-   Added Runtime.None to be able to pass None as parameter into Python from .NET
+-   Added PyObject.IsNone() to check if a Python object is None in .NET.
 
 ### Changed
 
diff --git a/src/runtime/runtime.cs b/src/runtime/runtime.cs
index 9d6be9277..2e06c9cba 100644
--- a/src/runtime/runtime.cs
+++ b/src/runtime/runtime.cs
@@ -473,17 +473,14 @@ private static void ResetPyMembers()
         internal static IntPtr PyNone;
         internal static IntPtr Error;
 
-        public static PyObject _none;
-        public static PyObject GetPyNone()
+        public static PyObject None
         {
-            if (_none == null)
+            get
             {
-                var result = Runtime.PyNone;
-                Runtime.XIncref(result);
-                _none= new PyObject(result);
+                var none = Runtime.PyNone;
+                Runtime.XIncref(none);
+                return new PyObject(none);
             }
-
-            return _none;
         }
 
         /// <summary>