diff --git a/src/Mod/Part/App/Geometry.cpp b/src/Mod/Part/App/Geometry.cpp
index 88a6774c01..9e4e5698c9 100644
--- a/src/Mod/Part/App/Geometry.cpp
+++ b/src/Mod/Part/App/Geometry.cpp
@@ -4566,7 +4566,7 @@ void         GeomTrimmedSurface::Restore    (Base::XMLReader &/*reader*/)    {as
 
 PyObject *GeomTrimmedSurface::getPyObject(void)
 {
-    return 0;
+    return new RectangularTrimmedSurfacePy(static_cast<GeomTrimmedSurface*>(this->clone()));
 }
 
 // -------------------------------------------------
diff --git a/src/Mod/Part/App/RectangularTrimmedSurfacePy.xml b/src/Mod/Part/App/RectangularTrimmedSurfacePy.xml
index 0ce372acf5..79fbe99e1a 100644
--- a/src/Mod/Part/App/RectangularTrimmedSurfacePy.xml
+++ b/src/Mod/Part/App/RectangularTrimmedSurfacePy.xml
@@ -25,5 +25,16 @@ The trimmed surface is built from a copy of the basis surface. Therefore, when t
 is modified the trimmed surface is not changed. Consequently, the trimmed surface does not
 necessarily have the same orientation as the basis surface.</UserDocu>
 		</Documentation>
-	</PythonExport>
+        <Methode Name="setTrim">
+          <Documentation>
+            <UserDocu>Modifies this patch by changing the trim values applied to the original surface</UserDocu>
+          </Documentation>
+        </Methode>
+        <Attribute Name="BasisSurface" ReadOnly="true">
+            <Documentation>
+                <UserDocu></UserDocu>
+            </Documentation>
+            <Parameter Name="BasisSurface" Type="Object"/>
+        </Attribute>
+    </PythonExport>
 </GenerateModel>
diff --git a/src/Mod/Part/App/RectangularTrimmedSurfacePyImp.cpp b/src/Mod/Part/App/RectangularTrimmedSurfacePyImp.cpp
index 07e80c8f2d..fba1d6a7ec 100644
--- a/src/Mod/Part/App/RectangularTrimmedSurfacePyImp.cpp
+++ b/src/Mod/Part/App/RectangularTrimmedSurfacePyImp.cpp
@@ -86,6 +86,41 @@ int RectangularTrimmedSurfacePy::PyInit(PyObject* args, PyObject* /*kwd*/)
     return -1;
 }
 
+PyObject* RectangularTrimmedSurfacePy::setTrim(PyObject *args)
+{
+    double u1, u2, v1, v2;
+    if (!PyArg_ParseTuple(args, "dddd", &u1, &u2, &v1, &v2))
+        return nullptr;
+
+    try {
+        Handle(Geom_RectangularTrimmedSurface) surf = Handle(Geom_RectangularTrimmedSurface)::DownCast
+            (getGeometryPtr()->handle());
+        if (surf.IsNull()) {
+            PyErr_SetString(PyExc_TypeError, "geometry is not a surface");
+            return nullptr;
+        }
+
+        surf->SetTrim(u1, u2, v1, v2);
+        Py_Return;
+    }
+    catch (const Standard_Failure& e) {
+        PyErr_SetString(PyExc_RuntimeError, e.GetMessageString());
+        return nullptr;
+    }
+}
+
+Py::Object RectangularTrimmedSurfacePy::getBasisSurface() const
+{
+    Handle(Geom_RectangularTrimmedSurface) surf = Handle(Geom_RectangularTrimmedSurface)::DownCast
+        (getGeometryPtr()->handle());
+    if (surf.IsNull()) {
+        throw Py::TypeError("geometry is not a surface");
+    }
+
+    std::unique_ptr<GeomSurface> geo(makeFromSurface(surf->BasisSurface()));
+    return Py::asObject(geo->getPyObject());
+}
+
 PyObject *RectangularTrimmedSurfacePy::getCustomAttributes(const char* /*attr*/) const
 {
     return 0;