diff --git a/etg/colour.py b/etg/colour.py
index 21da8581..25110c79 100644
--- a/etg/colour.py
+++ b/etg/colour.py
@@ -163,6 +163,8 @@ def run():
         briefDoc="""\
         Returns the RGB intensity values as a tuple, optionally the alpha value as well.""")
 
+    tools.addGetIMMethodTemplate(module, c, ['red', 'green', 'blue', 'alpha'])
+
 
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
diff --git a/etg/gbsizer.py b/etg/gbsizer.py
index 0827058d..23c66307 100644
--- a/etg/gbsizer.py
+++ b/etg/gbsizer.py
@@ -51,6 +51,9 @@ def run():
         """,
         briefDoc="Set both the row and column properties.")
 
+    tools.addGetIMMethodTemplate(module, c, ['row', 'col'])
+
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.GBPosition"+str(self.Get())')
@@ -92,6 +95,8 @@ def run():
         """,
         briefDoc="Set both the rowspan and colspan properties.")
 
+    tools.addGetIMMethodTemplate(module, c, ['rowspan', 'colspan'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.GBSpan"+str(self.Get())')
diff --git a/etg/gdicmn.py b/etg/gdicmn.py
index 00c8e63e..10dfe976 100644
--- a/etg/gdicmn.py
+++ b/etg/gdicmn.py
@@ -109,6 +109,9 @@ def run():
         pyArgsString="() -> (x,y)",
         briefDoc="Return the x and y properties as a tuple.")
 
+    tools.addGetIMMethodTemplate(module, c, ['x', 'y'])
+
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.Point"+str(self.Get())')
@@ -180,6 +183,8 @@ def run():
         pyArgsString="() -> (width, height)",
         briefDoc="Return the width and height properties as a tuple.")
 
+    tools.addGetIMMethodTemplate(module, c, ['width', 'height'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.Size"+str(self.Get())')
@@ -258,6 +263,8 @@ def run():
         pyArgsString="() -> (x, y, width, height)",
         briefDoc="Return the rectangle's properties as a tuple.")
 
+    tools.addGetIMMethodTemplate(module, c, ['x', 'y', 'width', 'height'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.Rect"+str(self.Get())')
@@ -310,6 +317,8 @@ def run():
         pyArgsString="() -> (x, y)",
         briefDoc="Return the point's properties as a tuple.")
 
+    tools.addGetIMMethodTemplate(module, c, ['x', 'y'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.RealPoint"+str(self.Get())')
diff --git a/etg/geometry.py b/etg/geometry.py
index 531472f4..f198c07d 100644
--- a/etg/geometry.py
+++ b/etg/geometry.py
@@ -65,6 +65,8 @@ def run():
         Get() -> (x,y)\n
         Return the x and y properties as a tuple.""")
 
+    tools.addGetIMMethodTemplate(module, c, ['x', 'y'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.Point2D"+str(self.Get())')
@@ -110,6 +112,8 @@ def run():
         Get() -> (x, y, width, height)\n
         Return the rectangle's properties as a tuple.""")
 
+    tools.addGetIMMethodTemplate(module, c, ['x', 'y', 'width', 'height'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.Rect2D"+str(self.Get())')
diff --git a/etg/grid.py b/etg/grid.py
index c4115b0a..591d2ec3 100644
--- a/etg/grid.py
+++ b/etg/grid.py
@@ -103,6 +103,8 @@ def run():
         pyArgsString="() -> (row,col)",
         briefDoc="Return the row and col properties as a tuple.")
 
+    tools.addGetIMMethodTemplate(module, c, ['Row', 'Col'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "GridCellCoords"+str(self.Get())')
diff --git a/etg/position.py b/etg/position.py
index 0127223d..dc2b5519 100644
--- a/etg/position.py
+++ b/etg/position.py
@@ -42,6 +42,8 @@ def run():
         pyArgsString="() -> (row,col)",
         briefDoc="Return the row and col properties as a tuple.")
 
+    tools.addGetIMMethodTemplate(module, c, ['Row', 'Col'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "wx.Position"+str(self.Get())')
diff --git a/etg/richtextbuffer.py b/etg/richtextbuffer.py
index 994054e8..ee231369 100644
--- a/etg/richtextbuffer.py
+++ b/etg/richtextbuffer.py
@@ -171,6 +171,8 @@ def run():
         pyArgsString="() -> (start, end)",
         briefDoc="Return the start and end properties as a tuple.")
 
+    tools.addGetIMMethodTemplate(module, c, ['Start', 'End'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "RichTextRange"+str(self.Get())')
diff --git a/etgtools/tweaker_tools.py b/etgtools/tweaker_tools.py
index 999ce63f..e9140482 100644
--- a/etgtools/tweaker_tools.py
+++ b/etgtools/tweaker_tools.py
@@ -616,6 +616,33 @@ def checkForUnitTestModule(module):
 
 #---------------------------------------------------------------------------
 
+def addGetIMMethodTemplate(module, klass, fields):
+    """
+    Add a bit of code to the module, and add a GetIM method to the klass which
+    returns an immutable representation self.
+    """
+    name = klass.pyName or klass.name
+    if name.startswith('wx'):
+        name = name[2:]
+
+    module.addPyCode("""\
+        from collections import namedtuple
+        _im_{name} = namedtuple('_im_{name}', {fields})
+        del namedtuple
+        """.format(name=name, fields=str(fields)))
+
+    klass.addPyMethod('GetIM', '(self)',
+        doc="""\
+            Returns an immutable representation of the ``wx.{name}`` object, based on ``namedtuple``.
+            
+            This new object is hashable and can be used as a dictionary key,
+            be added to sets, etc.  It can be converted back into a real ``wx.{name}``
+            with a simple statement like this: ``obj = wx.{name}(imObj)``.
+            """.format(name=name),
+        body="return _im_{name}(*self.Get())".format(name=name)
+        )
+
+#---------------------------------------------------------------------------
 
 def convertTwoIntegersTemplate(CLASS):
     # Note: The GIL is already acquired where this code is used.
diff --git a/unittests/test_colour.py b/unittests/test_colour.py
index 89456e7f..8526a56f 100644
--- a/unittests/test_colour.py
+++ b/unittests/test_colour.py
@@ -42,6 +42,19 @@ class Colour(wtc.WidgetTestCase):
             p = wx.Colour(wx.Rect(1,2,3,4))
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.Colour(1,2,3,4)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.red == obj.red
+        assert im.green == obj.green
+        assert im.blue == obj.blue
+        assert im.alpha == obj.alpha
+        obj2 = wx.Colour(im)
+        assert obj == obj2
+
+
     if hasattr(wx, 'testColourTypeMap'):
         def test_ColourTypemaps(self):
             c = wx.testColourTypeMap('red')
diff --git a/unittests/test_gbsizer.py b/unittests/test_gbsizer.py
index 113c544c..d76aea26 100644
--- a/unittests/test_gbsizer.py
+++ b/unittests/test_gbsizer.py
@@ -106,6 +106,29 @@ class gbsizer_Tests(wtc.WidgetTestCase):
         self.assertTrue(items[2].IsSpacer())
         self.assertTrue(items[0].Border == 5)
 
+
+    def test_GetIM_position(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.GBPosition(1,2)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.row == obj.row
+        assert im.col == obj.col
+        obj2 = wx.GBPosition(im)
+        assert obj == obj2
+
+    def test_GetIM_span(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.GBSpan(1,2)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.rowspan == obj.rowspan
+        assert im.colspan == obj.colspan
+        obj2 = wx.GBSpan(im)
+        assert obj == obj2
+
+
+
 #---------------------------------------------------------------------------
 
 
diff --git a/unittests/test_gdicmn.py b/unittests/test_gdicmn.py
index e1838a5b..7116ac75 100644
--- a/unittests/test_gdicmn.py
+++ b/unittests/test_gdicmn.py
@@ -117,6 +117,17 @@ class Point(unittest.TestCase):
         self.assertEqual(p6, (-4,-6))
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.Point(1,2)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.x == obj.x
+        assert im.y == obj.y
+        obj2 = wx.Point(im)
+        assert obj == obj2
+
+
     def test_converters(self):
         # Ensure that other types that are sequence-like can't be
         # auto-converted, the copy constructor is good-enough for testing this
@@ -241,6 +252,17 @@ class Size(unittest.TestCase):
             s[2]
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.Size(1,2)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.width == obj.width
+        assert im.height == obj.height
+        obj2 = wx.Size(im)
+        assert obj == obj2
+
+
     def test_converters(self):
         # Ensure that other types that are sequence-like can't be
         # auto-converted, the copy constructor is good-enough for testing this
@@ -273,6 +295,18 @@ class RealPoint(unittest.TestCase):
         p.y += 2
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.RealPoint(1,2)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.x == obj.x
+        assert im.y == obj.y
+        obj2 = wx.RealPoint(im)
+        assert obj == obj2
+
+
+
 
 #---------------------------------------------------------------------------
 
@@ -312,6 +346,19 @@ class Rect(unittest.TestCase):
         self.assertTrue(r.x == 0 and r.y == 0)
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.Rect(1,2,3,4)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.x == obj.x
+        assert im.y == obj.y
+        assert im.width == obj.width
+        assert im.height == obj.height
+        obj2 = wx.Rect(im)
+        assert obj == obj2
+
+
     def test_converters(self):
         # Ensure that other types that are sequence-like can't be
         # auto-converted, the copy constructor is good-enough for testing this
diff --git a/unittests/test_geometry.py b/unittests/test_geometry.py
index 8433fb2d..6bd9ab65 100644
--- a/unittests/test_geometry.py
+++ b/unittests/test_geometry.py
@@ -20,6 +20,16 @@ class Point2D(unittest.TestCase):
         self.assertTrue(p1 == (1.23, 4.56))
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.Point2D(1.23,2.34)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.x == obj.x
+        assert im.y == obj.y
+        obj2 = wx.Point2D(im)
+        assert obj == obj2
+
 
 class Rect2D(unittest.TestCase):
 
@@ -36,6 +46,19 @@ class Rect2D(unittest.TestCase):
         self.assertTrue(r1 is not r2)
         self.assertTrue(r1 == (.5, .5, 100.1, 99.2))
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.Rect2D(1.5, 2.5, 3.5, 4.5)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.x == obj.x
+        assert im.y == obj.y
+        assert im.width == obj.width
+        assert im.height == obj.height
+        obj2 = wx.Rect2D(im)
+        assert obj == obj2
+
+
 
 
 #---------------------------------------------------------------------------
diff --git a/unittests/test_grid.py b/unittests/test_grid.py
index 84a36bea..3a99907c 100644
--- a/unittests/test_grid.py
+++ b/unittests/test_grid.py
@@ -303,6 +303,17 @@ class grid_Tests(wtc.WidgetTestCase):
         wx.grid.Grid.SetCellHighlightPenWidth  # Does it exist
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.grid.GridCellCoords(1,2)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.Row == obj.Row
+        assert im.Col == obj.Col
+        obj2 = wx.grid.GridCellCoords(im)
+        assert obj == obj2
+
+
 #---------------------------------------------------------------------------
 
 if __name__ == '__main__':
diff --git a/unittests/test_position.py b/unittests/test_position.py
index e5f49616..c1b2395c 100644
--- a/unittests/test_position.py
+++ b/unittests/test_position.py
@@ -48,6 +48,19 @@ class position_Tests(wtc.WidgetTestCase):
         self.assertTrue(p4 == p1)
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.Position(1,2)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.Row == obj.Row
+        assert im.Col == obj.Col
+        obj2 = wx.Position(im)
+        assert obj == obj2
+
+
+
+
 #---------------------------------------------------------------------------
 
 
diff --git a/unittests/test_richtextbuffer.py b/unittests/test_richtextbuffer.py
index 9171ed52..fb7e2b05 100644
--- a/unittests/test_richtextbuffer.py
+++ b/unittests/test_richtextbuffer.py
@@ -287,6 +287,17 @@ class richtextbuffer_Tests(wtc.WidgetTestCase):
 
 
 
+    def test_GetIM(self):
+        # Test the immutable version returned by GetIM
+        obj = wx.richtext.RichTextRange(1,2)
+        im = obj.GetIM()
+        assert isinstance(im, tuple)
+        assert im.Start == obj.Start
+        assert im.End == obj.End
+        obj2 = wx.richtext.RichTextRange(im)
+        assert obj == obj2
+
+