Base: implement a lightweight smart pointer for PyObject like Py::Object to reduce includes of Python.h in header files

src/App/DocumentObject.h

@@ -30,6 +30,7 @@
 #include <App/PropertyLinks.h>
 #include <App/PropertyStandard.h>
 #include <Base/Matrix.h>
+#include <Base/SmartPtrPy.h>
 
 #include <bitset>
 #include <unordered_map>
@@ -609,7 +610,7 @@ protected:
 
      /// python object of this class and all descendent
 protected: // attributes
-    Py::Object PythonObject;
+    Py::SmartPtr PythonObject;
     /// pointer to the document this object belongs to
     App::Document* _pDoc;
 

src/App/ObjectIdentifier.cpp

@@ -34,6 +34,7 @@
 #include <Base/Interpreter.h>
 #include <Base/QuantityPy.h>
 #include <Base/Console.h>
+#include <CXX/Objects.hxx>
 
 #include "ObjectIdentifier.h"
 #include "Application.h"

src/App/ObjectIdentifier.h

@@ -30,10 +30,11 @@
 #include <string>
 #include <vector>
 #include <boost/any.hpp>
-#include <CXX/Objects.hxx>
 #include <FCConfig.h>
 
-
+namespace Py {
+class Object;
+}
 namespace App
 {
 

src/App/Property.cpp

@@ -30,6 +30,7 @@
 #include <atomic>
 #include <Base/Tools.h>
 #include <Base/Writer.h>
+#include <CXX/Objects.hxx>
 
 #include "Property.h"
 #include "ObjectIdentifier.h"

src/App/PropertyFile.cpp

@@ -24,6 +24,7 @@
 #include "PreCompiled.h"
 
 #include <Base/Console.h>
+#include <Base/PyObjectBase.h>
 #include <Base/Reader.h>
 #include <Base/Writer.h>
 #include <Base/Uuid.h>