diff --git a/Tools/idle/AutoIndent.py b/Tools/idle/AutoIndent.py
index 87f75c1..15b5011 100644
--- a/Tools/idle/AutoIndent.py
+++ b/Tools/idle/AutoIndent.py
@@ -171,7 +171,7 @@
         expand, tabwidth = string.expandtabs, self.tabwidth
         have = len(expand(chars, tabwidth))
         assert have > 0
-        want = int((have - 1) / self.indentwidth) * self.indentwidth
+        want = int((have - 1) // self.indentwidth) * self.indentwidth
         ncharsdeleted = 0
         while 1:
             chars = chars[:-1]
@@ -495,7 +495,7 @@
             effective = effective + 1
         elif ch == '\t':
             raw = raw + 1
-            effective = (int(effective / tabwidth) + 1) * tabwidth
+            effective = (effective // tabwidth + 1) * tabwidth
         else:
             break
     return raw, effective
diff --git a/Tools/idle/EditorWindow.py b/Tools/idle/EditorWindow.py
index bb69a5b..f924c45 100644
--- a/Tools/idle/EditorWindow.py
+++ b/Tools/idle/EditorWindow.py
@@ -465,7 +465,7 @@
         top, bot = self.getwindowlines()
         lineno = self.getlineno(mark)
         height = bot - top
-        newtop = max(1, lineno - height/2)
+        newtop = max(1, lineno - height//2)
         text.yview(float(newtop))
 
     def getwindowlines(self):