diff --git a/CHANGES.rst b/CHANGES.rst
index 468a711d..0348feff 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -8,6 +8,7 @@
 wxPython Changelog
 ==================
 
+
 4.1.0
 -----
 * (not yet released)
@@ -29,6 +30,27 @@ Other changes in this release:
 
 
 
+4.0.2
+-----
+* (not yet released)
+
+PyPI:   https://pypi.python.org/pypi/wxPython/4.0.2
+Extras: https://extras.wxPython.org/wxPython4/extras/
+Pip:    ``pip install wxPython==4.0.2``
+
+Changes in this release include the following:
+
+* Fixed wx.html2.EVT_WEBVIEW_NAVIGATING event not being sent on some versions
+  of Linux. (#741)
+
+* wx.Sizers can now be used as an iterator to iterate over the items within
+  the sizer. (#738)
+
+* Fix Python3 division in ThumbnailCtrl. (#746)
+
+
+
+
 4.0.1 "Lemonade"
 ----------------
 * 2-Feb-2018
diff --git a/build.py b/build.py
index 41ed39ac..8fc83da4 100755
--- a/build.py
+++ b/build.py
@@ -1731,6 +1731,8 @@ def cmd_clean_vagrant(options, args):
     if os.path.exists(d):
         shutil.rmtree(d)
 
+def cmd_clean_all(options, args):
+    cmd_cleanall(options, args)
 
 def cmd_cleanall(options, args):
     # These take care of all the object, lib, shared lib files created by the
diff --git a/etg/sizer.py b/etg/sizer.py
index 3bee2a4b..bed628b2 100644
--- a/etg/sizer.py
+++ b/etg/sizer.py
@@ -154,8 +154,12 @@ def run():
         import wx.siplib
         return not wx.siplib.isdeleted(self)
         """)
-    c.addPyCode('Sizer.__bool__ = Sizer.__nonzero__') # For Python 3
 
+    c.addPyMethod('__iter__', '(self)',
+        doc = "A Py convenience method that allows Sizers to act as iterables that will yield their wx.SizerItems.",
+        body = "for item in self.GetChildren(): yield item")
+
+    c.addPyCode('Sizer.__bool__ = Sizer.__nonzero__') # For Python 3
 
 
     #---------------------------------------------
diff --git a/unittests/test_sizer.py b/unittests/test_sizer.py
index abd0a36f..7703c972 100644
--- a/unittests/test_sizer.py
+++ b/unittests/test_sizer.py
@@ -71,6 +71,15 @@ class sizer_Tests(wtc.WidgetTestCase):
         self.assertTrue(items[1].IsSpacer())
         self.assertTrue(items[2].Border == 5)
 
+    def test_iter(self):
+        bs = wx.BoxSizer()
+        widgetlist = [wx.Panel(self.frame) for _ in range(5)]
+
+        sizeritems = [x for x in bs]
+        for item in sizeritems:
+            self.assertTrue(isinstance(item, wx.SizerItem))
+
+        self.assertTrue([x.GetWidget() for x in bs] == widgetlist)
 
     def test_sizerSpacers1(self):
         bs = wx.BoxSizer()
diff --git a/wx/lib/agw/thumbnailctrl.py b/wx/lib/agw/thumbnailctrl.py
index 5e950f78..7d97cb05 100644
--- a/wx/lib/agw/thumbnailctrl.py
+++ b/wx/lib/agw/thumbnailctrl.py
@@ -1790,7 +1790,7 @@ class ScrolledThumbnail(wx.ScrolledWindow):
         :param `y`: the mouse `y` position.
         """
 
-        col = (x - self._tBorder)/(self._tWidth + self._tBorder)
+        col = (x - self._tBorder)//(self._tWidth + self._tBorder)
 
         if col >= self._cols:
             col = self._cols - 1
@@ -1942,7 +1942,7 @@ class ScrolledThumbnail(wx.ScrolledWindow):
             return
 
         # get row
-        row = self.GetSelection()/self._cols
+        row = self.GetSelection()//self._cols
         # calc position to scroll view
 
         paintRect = self.GetPaintRect()
@@ -2586,4 +2586,3 @@ class ScrolledThumbnail(wx.ScrolledWindow):
         self.Refresh()
 
 
-