diff --git a/src/Gui/ExpressionBindingPy.cpp b/src/Gui/ExpressionBindingPy.cpp
index 653d7bc75c..548f1e7050 100644
--- a/src/Gui/ExpressionBindingPy.cpp
+++ b/src/Gui/ExpressionBindingPy.cpp
@@ -32,23 +32,27 @@
 
 using namespace Gui;
 
-void ExpressionBindingPy::init_type()
+ExpressionBindingPy::ExpressionBindingPy(Py::PythonClassInstance* self, Py::Tuple& args, Py::Dict& kwds)
+  : Py::PythonClass<ExpressionBindingPy>::PythonClass(self, args, kwds)
 {
-    behaviors().name("ExpressionBinding");
-    behaviors().doc("Python interface class for ExpressionBinding");
-    // you must have overwritten the virtual functions
-    behaviors().supportRepr();
-    behaviors().supportGetattr();
-    behaviors().supportSetattr();
-    behaviors().set_tp_new(PyMake);
-    behaviors().readyType();
+    PyObject* pyObj;
+    if (!PyArg_ParseTuple(args.ptr(), "O", &pyObj)) {
+        throw Py::Exception();
+    }
 
-    add_varargs_method("bind", &ExpressionBindingPy::bind, "Bind with an expression");
-    add_varargs_method("isBound", &ExpressionBindingPy::isBound, "Check if already bound with an expression");
-    add_varargs_method("apply", &ExpressionBindingPy::apply, "apply");
-    add_varargs_method("hasExpression", &ExpressionBindingPy::hasExpression, "hasExpression");
-    add_varargs_method("autoApply", &ExpressionBindingPy::autoApply, "autoApply");
-    add_varargs_method("setAutoApply", &ExpressionBindingPy::setAutoApply, "setAutoApply");
+    PythonWrapper wrap;
+    wrap.loadWidgetsModule();
+
+    QWidget* obj = dynamic_cast<QWidget*>(wrap.toQObject(Py::Object(pyObj)));
+    expr = asBinding(obj);
+
+    if (!expr) {
+        throw Py::Exception(PyExc_TypeError, "Wrong type");
+    }
+}
+
+ExpressionBindingPy::~ExpressionBindingPy()
+{
 }
 
 ExpressionBinding* ExpressionBindingPy::asBinding(QWidget* obj)
@@ -93,35 +97,6 @@ ExpressionBinding* ExpressionBindingPy::asBinding(QWidget* obj)
     return expr;
 }
 
-PyObject *ExpressionBindingPy::PyMake(struct _typeobject *, PyObject * args, PyObject *)
-{
-    PyObject* pyObj;
-    if (!PyArg_ParseTuple(args, "O", &pyObj))
-        return nullptr;
-
-    PythonWrapper wrap;
-    wrap.loadWidgetsModule();
-
-    QWidget* obj = dynamic_cast<QWidget*>(wrap.toQObject(Py::Object(pyObj)));
-    ExpressionBinding* expr = asBinding(obj);
-
-    if (!expr) {
-        PyErr_SetString(PyExc_TypeError, "Wrong type");
-        return nullptr;
-    }
-
-    return new ExpressionBindingPy(expr);
-}
-
-ExpressionBindingPy::ExpressionBindingPy(ExpressionBinding* expr)
-  : expr(expr)
-{
-}
-
-ExpressionBindingPy::~ExpressionBindingPy()
-{
-}
-
 Py::Object ExpressionBindingPy::repr()
 {
     std::stringstream s;
@@ -133,8 +108,9 @@ Py::Object ExpressionBindingPy::bind(const Py::Tuple& args)
 {
     PyObject* py;
     const char* str;
-    if (!PyArg_ParseTuple(args.ptr(), "O!s", &App::DocumentObjectPy::Type, &py, &str))
+    if (!PyArg_ParseTuple(args.ptr(), "O!s", &App::DocumentObjectPy::Type, &py, &str)) {
         throw Py::Exception();
+    }
 
     try {
         App::DocumentObject* obj = static_cast<App::DocumentObjectPy*>(py)->getDocumentObjectPtr();
@@ -154,44 +130,65 @@ Py::Object ExpressionBindingPy::bind(const Py::Tuple& args)
         throw Py::RuntimeError("Cannot bind to object");
     }
 }
+PYCXX_VARARGS_METHOD_DECL(ExpressionBindingPy, bind)
 
-Py::Object ExpressionBindingPy::isBound(const Py::Tuple& args)
+Py::Object ExpressionBindingPy::isBound()
 {
-    if (!PyArg_ParseTuple(args.ptr(), ""))
-        throw Py::Exception();
     return Py::Boolean(expr->isBound());
 }
+PYCXX_NOARGS_METHOD_DECL(ExpressionBindingPy, isBound)
 
 Py::Object ExpressionBindingPy::apply(const Py::Tuple& args)
 {
     const char* str;
-    if (!PyArg_ParseTuple(args.ptr(), "s", &str))
+    if (!PyArg_ParseTuple(args.ptr(), "s", &str)) {
         throw Py::Exception();
+    }
 
     return Py::Boolean(expr->apply(str));
 }
+PYCXX_VARARGS_METHOD_DECL(ExpressionBindingPy, apply)
 
-Py::Object ExpressionBindingPy::hasExpression(const Py::Tuple& args)
+Py::Object ExpressionBindingPy::hasExpression()
 {
-    if (!PyArg_ParseTuple(args.ptr(), ""))
-        throw Py::Exception();
     return Py::Boolean(expr->hasExpression());
 }
+PYCXX_NOARGS_METHOD_DECL(ExpressionBindingPy, hasExpression)
 
-Py::Object ExpressionBindingPy::autoApply(const Py::Tuple& args)
+Py::Object ExpressionBindingPy::autoApply()
 {
-    if (!PyArg_ParseTuple(args.ptr(), ""))
-        throw Py::Exception();
     return Py::Boolean(expr->autoApply());
 }
+PYCXX_NOARGS_METHOD_DECL(ExpressionBindingPy, autoApply)
 
 Py::Object ExpressionBindingPy::setAutoApply(const Py::Tuple& args)
 {
     PyObject* b;
-    if (!PyArg_ParseTuple(args.ptr(), "O!", &PyBool_Type, &b))
+    if (!PyArg_ParseTuple(args.ptr(), "O!", &PyBool_Type, &b)) {
         throw Py::Exception();
+    }
 
     bool value = Base::asBoolean(b);
     expr->setAutoApply(value);
     return Py::None();
 }
+PYCXX_VARARGS_METHOD_DECL(ExpressionBindingPy, setAutoApply)
+
+void ExpressionBindingPy::init_type()
+{
+    behaviors().name("Gui.ExpressionBinding");
+    behaviors().doc("Python interface class for ExpressionBinding");
+    // you must have overwritten the virtual functions
+    behaviors().supportRepr();
+    behaviors().supportGetattro();
+    behaviors().supportSetattro();
+
+    PYCXX_ADD_VARARGS_METHOD(bind, bind, "Bind with an expression");
+    PYCXX_ADD_NOARGS_METHOD(isBound, isBound, "Check if already bound with an expression");
+    PYCXX_ADD_VARARGS_METHOD(apply, apply, "apply");
+    PYCXX_ADD_NOARGS_METHOD(hasExpression, hasExpression, "hasExpression");
+    PYCXX_ADD_NOARGS_METHOD(autoApply, autoApply, "autoApply");
+    PYCXX_ADD_VARARGS_METHOD(setAutoApply, setAutoApply, "setAutoApply");
+
+    behaviors().readyType();
+}
diff --git a/src/Gui/ExpressionBindingPy.h b/src/Gui/ExpressionBindingPy.h
index e25d4e4196..ab19e44f3f 100644
--- a/src/Gui/ExpressionBindingPy.h
+++ b/src/Gui/ExpressionBindingPy.h
@@ -29,25 +29,24 @@ class QWidget;
 namespace Gui {
 class ExpressionBinding;
 
-class ExpressionBindingPy : public Py::PythonExtension<ExpressionBindingPy>
+class ExpressionBindingPy : public Py::PythonClass<ExpressionBindingPy>
 {
 public:
     static void init_type();    // announce properties and methods
 
-    explicit ExpressionBindingPy(ExpressionBinding*);
+    ExpressionBindingPy(Py::PythonClassInstance* self, Py::Tuple& args, Py::Dict& kwds);
     ~ExpressionBindingPy() override;
 
     Py::Object repr() override;
 
     Py::Object bind(const Py::Tuple&);
-    Py::Object isBound(const Py::Tuple&);
+    Py::Object isBound();
     Py::Object apply(const Py::Tuple&);
-    Py::Object hasExpression(const Py::Tuple&);
-    Py::Object autoApply(const Py::Tuple&);
+    Py::Object hasExpression();
+    Py::Object autoApply();
     Py::Object setAutoApply(const Py::Tuple&);
 
 private:
-    static PyObject *PyMake(struct _typeobject *, PyObject *, PyObject *);
     static ExpressionBinding* asBinding(QWidget*);
 
 private: