diff --git a/Lib/idlelib/AutoCompleteWindow.py b/Lib/idlelib/AutoCompleteWindow.py
index 298177f..1ad8d15 100644
--- a/Lib/idlelib/AutoCompleteWindow.py
+++ b/Lib/idlelib/AutoCompleteWindow.py
@@ -1,7 +1,7 @@
 """
 An auto-completion window for IDLE, used by the AutoComplete extension
 """
-from Tkinter import *
+from tkinter import *
 from idlelib.MultiCall import MC_SHIFT
 from idlelib.AutoComplete import COMPLETE_FILES, COMPLETE_ATTRIBUTES
 
diff --git a/Lib/idlelib/CallTipWindow.py b/Lib/idlelib/CallTipWindow.py
index 2223885..27ed085 100644
--- a/Lib/idlelib/CallTipWindow.py
+++ b/Lib/idlelib/CallTipWindow.py
@@ -4,7 +4,7 @@
 Used by the CallTips IDLE extension.
 
 """
-from Tkinter import *
+from tkinter import *
 
 HIDE_VIRTUAL_EVENT_NAME = "<<calltipwindow-hide>>"
 HIDE_SEQUENCES = ("<Key-Escape>", "<FocusOut>")
diff --git a/Lib/idlelib/CodeContext.py b/Lib/idlelib/CodeContext.py
index 3ab6e47..84491d5 100644
--- a/Lib/idlelib/CodeContext.py
+++ b/Lib/idlelib/CodeContext.py
@@ -9,8 +9,8 @@
 not open blocks are not shown in the context hints pane.
 
 """
-import Tkinter
-from Tkconstants import TOP, LEFT, X, W, SUNKEN
+import tkinter
+from tkinter.constants import TOP, LEFT, X, W, SUNKEN
 import re
 from sys import maxsize as INFINITY
 from idlelib.configHandler import idleConf
@@ -69,7 +69,7 @@
             border = 0
             for widget in widgets:
                 border += int(str( widget.cget('border') ))
-            self.label = Tkinter.Label(self.editwin.top,
+            self.label = tkinter.Label(self.editwin.top,
                                        text="\n" * (self.context_depth - 1),
                                        anchor=W, justify=LEFT,
                                        font=self.textfont,
diff --git a/Lib/idlelib/ColorDelegator.py b/Lib/idlelib/ColorDelegator.py
index e7112c9..ab69b8a 100644
--- a/Lib/idlelib/ColorDelegator.py
+++ b/Lib/idlelib/ColorDelegator.py
@@ -2,7 +2,7 @@
 import re
 import keyword
 import builtins
-from Tkinter import *
+from tkinter import *
 from idlelib.Delegator import Delegator
 from idlelib.configHandler import idleConf
 
diff --git a/Lib/idlelib/Debugger.py b/Lib/idlelib/Debugger.py
index 00aa4bb..ed66084 100644
--- a/Lib/idlelib/Debugger.py
+++ b/Lib/idlelib/Debugger.py
@@ -1,7 +1,7 @@
 import os
 import bdb
 import types
-from Tkinter import *
+from tkinter import *
 from idlelib.WindowList import ListedToplevel
 from idlelib.ScrolledList import ScrolledList
 from idlelib import macosxSupport
diff --git a/Lib/idlelib/EditorWindow.py b/Lib/idlelib/EditorWindow.py
index e049b66..a7970ba 100644
--- a/Lib/idlelib/EditorWindow.py
+++ b/Lib/idlelib/EditorWindow.py
@@ -4,9 +4,9 @@
 import string
 import imp
 from itertools import count
-from Tkinter import *
-import tkSimpleDialog
-import tkMessageBox
+from tkinter import *
+import tkinter.simpledialog as tkSimpleDialog
+import tkinter.messagebox as tkMessageBox
 import traceback
 import webbrowser
 
diff --git a/Lib/idlelib/FileList.py b/Lib/idlelib/FileList.py
index 53e30b4..4c0076d 100644
--- a/Lib/idlelib/FileList.py
+++ b/Lib/idlelib/FileList.py
@@ -1,6 +1,6 @@
 import os
-from Tkinter import *
-import tkMessageBox
+from tkinter import *
+import tkinter.messagebox as tkMessageBox
 
 
 class FileList:
diff --git a/Lib/idlelib/GrepDialog.py b/Lib/idlelib/GrepDialog.py
index 51affef..01e0483 100644
--- a/Lib/idlelib/GrepDialog.py
+++ b/Lib/idlelib/GrepDialog.py
@@ -1,7 +1,7 @@
 import os
 import fnmatch
 import sys
-from Tkinter import *
+from tkinter import *
 from idlelib import SearchEngine
 from idlelib.SearchDialogBase import SearchDialogBase
 
diff --git a/Lib/idlelib/IOBinding.py b/Lib/idlelib/IOBinding.py
index b4de84e..a6559ab 100644
--- a/Lib/idlelib/IOBinding.py
+++ b/Lib/idlelib/IOBinding.py
@@ -3,11 +3,11 @@
 import sys
 import codecs
 import tempfile
-import tkFileDialog
-import tkMessageBox
+import tkinter.filedialog as tkFileDialog
+import tkinter.messagebox as tkMessageBox
 import re
-from Tkinter import *
-from SimpleDialog import SimpleDialog
+from tkinter import *
+from tkinter.simpledialog import SimpleDialog
 
 from idlelib.configHandler import idleConf
 
diff --git a/Lib/idlelib/MultiCall.py b/Lib/idlelib/MultiCall.py
index f2e3887..1c40638 100644
--- a/Lib/idlelib/MultiCall.py
+++ b/Lib/idlelib/MultiCall.py
@@ -31,7 +31,7 @@
 
 import sys
 import re
-import Tkinter
+import tkinter
 
 # the event type constants, which define the meaning of mc_type
 MC_KEYPRESS=0; MC_KEYRELEASE=1; MC_BUTTONPRESS=2; MC_BUTTONRELEASE=3;
@@ -304,7 +304,7 @@
         return _multicall_dict[widget]
 
     class MultiCall (widget):
-        assert issubclass(widget, Tkinter.Misc)
+        assert issubclass(widget, tkinter.Misc)
 
         def __init__(self, *args, **kwargs):
             widget.__init__(self, *args, **kwargs)
@@ -396,8 +396,8 @@
 
 if __name__ == "__main__":
     # Test
-    root = Tkinter.Tk()
-    text = MultiCallCreator(Tkinter.Text)(root)
+    root = tkinter.Tk()
+    text = MultiCallCreator(tkinter.Text)(root)
     text.pack()
     def bindseq(seq, n=[0]):
         def handler(event):
diff --git a/Lib/idlelib/MultiStatusBar.py b/Lib/idlelib/MultiStatusBar.py
index 8ee2d03..4fc8dcf 100644
--- a/Lib/idlelib/MultiStatusBar.py
+++ b/Lib/idlelib/MultiStatusBar.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 class MultiStatusBar(Frame):
 
diff --git a/Lib/idlelib/ObjectBrowser.py b/Lib/idlelib/ObjectBrowser.py
index 4cb432f..b359efc 100644
--- a/Lib/idlelib/ObjectBrowser.py
+++ b/Lib/idlelib/ObjectBrowser.py
@@ -123,7 +123,7 @@
 
 def _test():
     import sys
-    from Tkinter import Tk
+    from tkinter import Tk
     root = Tk()
     root.configure(bd=0, bg="yellow")
     root.focus_set()
diff --git a/Lib/idlelib/OutputWindow.py b/Lib/idlelib/OutputWindow.py
index 42aa77e..0782eaf 100644
--- a/Lib/idlelib/OutputWindow.py
+++ b/Lib/idlelib/OutputWindow.py
@@ -1,7 +1,7 @@
-from Tkinter import *
+from tkinter import *
 from idlelib.EditorWindow import EditorWindow
 import re
-import tkMessageBox
+import tkinter.messagebox as tkMessageBox
 from idlelib import IOBinding
 
 class OutputWindow(EditorWindow):
diff --git a/Lib/idlelib/Percolator.py b/Lib/idlelib/Percolator.py
index 80140d0..c91de38 100644
--- a/Lib/idlelib/Percolator.py
+++ b/Lib/idlelib/Percolator.py
@@ -52,7 +52,7 @@
             filter.setdelegate(None)
 
 def main():
-    import Tkinter as Tk
+    import tkinter as Tk
     class Tracer(Delegator):
         def __init__(self, name):
             self.name = name
diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py
index 16f9ccf..a7fd928 100644
--- a/Lib/idlelib/PyShell.py
+++ b/Lib/idlelib/PyShell.py
@@ -15,12 +15,12 @@
 from code import InteractiveInterpreter
 
 try:
-    from Tkinter import *
+    from tkinter import *
 except ImportError:
     print("** IDLE can't import Tkinter.  " \
           "Your Python may not be configured for Tk. **", file=sys.__stderr__)
     sys.exit(1)
-import tkMessageBox
+import tkinter.messagebox as tkMessageBox
 
 from idlelib.EditorWindow import EditorWindow, fixwordbreaks
 from idlelib.FileList import FileList
@@ -983,8 +983,8 @@
                    (sys.version, sys.platform, self.COPYRIGHT,
                     self.firewallmessage, idlever.IDLE_VERSION, nosub))
         self.showprompt()
-        import Tkinter
-        Tkinter._default_root = None # 03Jan04 KBK What's this?
+        import tkinter
+        tkinter._default_root = None # 03Jan04 KBK What's this?
         return True
 
     def readline(self):
diff --git a/Lib/idlelib/ReplaceDialog.py b/Lib/idlelib/ReplaceDialog.py
index 2d6c802..d713e61 100644
--- a/Lib/idlelib/ReplaceDialog.py
+++ b/Lib/idlelib/ReplaceDialog.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 from idlelib import SearchEngine
 from idlelib.SearchDialogBase import SearchDialogBase
diff --git a/Lib/idlelib/ScriptBinding.py b/Lib/idlelib/ScriptBinding.py
index 226c66c..1e98f1e 100644
--- a/Lib/idlelib/ScriptBinding.py
+++ b/Lib/idlelib/ScriptBinding.py
@@ -22,7 +22,7 @@
 import string
 import tabnanny
 import tokenize
-import tkMessageBox
+import tkinter.messagebox as tkMessageBox
 from idlelib.EditorWindow import EditorWindow
 from idlelib import PyShell
 
diff --git a/Lib/idlelib/ScrolledList.py b/Lib/idlelib/ScrolledList.py
index 350fdbd..0255a0a 100644
--- a/Lib/idlelib/ScrolledList.py
+++ b/Lib/idlelib/ScrolledList.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 class ScrolledList:
 
diff --git a/Lib/idlelib/SearchDialog.py b/Lib/idlelib/SearchDialog.py
index 7c70b84..76c444c 100644
--- a/Lib/idlelib/SearchDialog.py
+++ b/Lib/idlelib/SearchDialog.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 from idlelib import SearchEngine
 from idlelib.SearchDialogBase import SearchDialogBase
diff --git a/Lib/idlelib/SearchDialogBase.py b/Lib/idlelib/SearchDialogBase.py
index f63e7ae..65914ac 100644
--- a/Lib/idlelib/SearchDialogBase.py
+++ b/Lib/idlelib/SearchDialogBase.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 class SearchDialogBase:
 
diff --git a/Lib/idlelib/SearchEngine.py b/Lib/idlelib/SearchEngine.py
index 6745faf..13a6a6b 100644
--- a/Lib/idlelib/SearchEngine.py
+++ b/Lib/idlelib/SearchEngine.py
@@ -1,6 +1,6 @@
 import re
-from Tkinter import *
-import tkMessageBox
+from tkinter import *
+import tkinter.messagebox as tkMessageBox
 
 def get(root):
     if not hasattr(root, "_searchengine"):
diff --git a/Lib/idlelib/StackViewer.py b/Lib/idlelib/StackViewer.py
index 9ca1ff5..4ef2d31 100644
--- a/Lib/idlelib/StackViewer.py
+++ b/Lib/idlelib/StackViewer.py
@@ -7,7 +7,7 @@
 
 def StackBrowser(root, flist=None, tb=None, top=None):
     if top is None:
-        from Tkinter import Toplevel
+        from tkinter import Toplevel
         top = Toplevel(root)
     sc = ScrolledCanvas(top, bg="white", highlightthickness=0)
     sc.frame.pack(expand=1, fill="both")
diff --git a/Lib/idlelib/ToolTip.py b/Lib/idlelib/ToolTip.py
index ce7a3d3..b178803 100644
--- a/Lib/idlelib/ToolTip.py
+++ b/Lib/idlelib/ToolTip.py
@@ -3,7 +3,7 @@
 # may be useful for some purposes in (or almost in ;) the current project scope
 # Ideas gleaned from PySol
 
-from Tkinter import *
+from tkinter import *
 
 class ToolTipBase:
 
diff --git a/Lib/idlelib/TreeWidget.py b/Lib/idlelib/TreeWidget.py
index 04e16a2..d4e524b 100644
--- a/Lib/idlelib/TreeWidget.py
+++ b/Lib/idlelib/TreeWidget.py
@@ -15,7 +15,7 @@
 # - optimize tree redraw after expand of subnode
 
 import os
-from Tkinter import *
+from tkinter import *
 import imp
 
 from idlelib import ZoomHeight
diff --git a/Lib/idlelib/UndoDelegator.py b/Lib/idlelib/UndoDelegator.py
index 57b02df..d2ef638 100644
--- a/Lib/idlelib/UndoDelegator.py
+++ b/Lib/idlelib/UndoDelegator.py
@@ -1,5 +1,5 @@
 import string
-from Tkinter import *
+from tkinter import *
 
 from idlelib.Delegator import Delegator
 
diff --git a/Lib/idlelib/WidgetRedirector.py b/Lib/idlelib/WidgetRedirector.py
index 3df5a9a..ba5251f 100644
--- a/Lib/idlelib/WidgetRedirector.py
+++ b/Lib/idlelib/WidgetRedirector.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 class WidgetRedirector:
 
diff --git a/Lib/idlelib/WindowList.py b/Lib/idlelib/WindowList.py
index 28b55b8..761e015 100644
--- a/Lib/idlelib/WindowList.py
+++ b/Lib/idlelib/WindowList.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 class WindowList:
 
diff --git a/Lib/idlelib/aboutDialog.py b/Lib/idlelib/aboutDialog.py
index 43a1313..cfccc0f 100644
--- a/Lib/idlelib/aboutDialog.py
+++ b/Lib/idlelib/aboutDialog.py
@@ -2,7 +2,7 @@
 
 """
 
-from Tkinter import *
+from tkinter import *
 import os
 
 from idlelib import textView
diff --git a/Lib/idlelib/configDialog.py b/Lib/idlelib/configDialog.py
index b750dcd..db6d541 100644
--- a/Lib/idlelib/configDialog.py
+++ b/Lib/idlelib/configDialog.py
@@ -9,8 +9,10 @@
 Refer to comments in EditorWindow autoindent code for details.
 
 """
-from Tkinter import *
-import tkMessageBox, tkColorChooser, tkFont
+from tkinter import *
+import tkinter.messagebox as tkMessageBox
+import tkinter.colorchooser as tkColorChooser
+import tkinter.font as tkFont
 import copy
 
 from idlelib.configHandler import idleConf
diff --git a/Lib/idlelib/configHelpSourceEdit.py b/Lib/idlelib/configHelpSourceEdit.py
index 912a441..2ccb400 100644
--- a/Lib/idlelib/configHelpSourceEdit.py
+++ b/Lib/idlelib/configHelpSourceEdit.py
@@ -3,9 +3,9 @@
 import os
 import sys
 
-from Tkinter import *
-import tkMessageBox
-import tkFileDialog
+from tkinter import *
+import tkinter.messagebox as tkMessageBox
+import tkinter.filedialog as tkFileDialog
 
 class GetHelpSourceDialog(Toplevel):
     def __init__(self, parent, title, menuItem='', filePath=''):
diff --git a/Lib/idlelib/configSectionNameDialog.py b/Lib/idlelib/configSectionNameDialog.py
index 21dfab1..4378d6f 100644
--- a/Lib/idlelib/configSectionNameDialog.py
+++ b/Lib/idlelib/configSectionNameDialog.py
@@ -2,8 +2,8 @@
 Dialog that allows user to specify a new config file section name.
 Used to get new highlight theme and keybinding set names.
 """
-from Tkinter import *
-import tkMessageBox
+from tkinter import *
+import tkinter.messagebox as tkMessageBox
 
 class GetCfgSectionNameDialog(Toplevel):
     def __init__(self,parent,title,message,usedNames):
diff --git a/Lib/idlelib/dynOptionMenuWidget.py b/Lib/idlelib/dynOptionMenuWidget.py
index 78406d7..922de96 100644
--- a/Lib/idlelib/dynOptionMenuWidget.py
+++ b/Lib/idlelib/dynOptionMenuWidget.py
@@ -2,8 +2,8 @@
 OptionMenu widget modified to allow dynamic menu reconfiguration
 and setting of highlightthickness
 """
-from Tkinter import OptionMenu
-from Tkinter import _setit
+from tkinter import OptionMenu
+from tkinter import _setit
 import copy
 
 class DynOptionMenu(OptionMenu):
diff --git a/Lib/idlelib/keybindingDialog.py b/Lib/idlelib/keybindingDialog.py
index f326b6f..f5d32ef 100644
--- a/Lib/idlelib/keybindingDialog.py
+++ b/Lib/idlelib/keybindingDialog.py
@@ -1,8 +1,8 @@
 """
 Dialog for building Tkinter accelerator key bindings
 """
-from Tkinter import *
-import tkMessageBox
+from tkinter import *
+import tkinter.messagebox as tkMessageBox
 import string
 
 class GetKeysDialog(Toplevel):
diff --git a/Lib/idlelib/macosxSupport.py b/Lib/idlelib/macosxSupport.py
index 20c8e23..5e249e2 100644
--- a/Lib/idlelib/macosxSupport.py
+++ b/Lib/idlelib/macosxSupport.py
@@ -3,7 +3,7 @@
 GUI application (as opposed to an X11 application).
 """
 import sys
-import Tkinter
+import tkinter
 
 def runningAsOSXApp():
     """ Returns True iff running from the IDLE.app bundle on OSX """
@@ -26,7 +26,7 @@
 def hideTkConsole(root):
     try:
         root.tk.call('console', 'hide')
-    except Tkinter.TclError:
+    except tkinter.TclError:
         # Some versions of the Tk framework don't have a console object
         pass
 
@@ -46,7 +46,7 @@
     #
     # Due to a (mis-)feature of TkAqua the user will also see an empty Help
     # menu.
-    from Tkinter import Menu, Text, Text
+    from tkinter import Menu, Text, Text
     from idlelib.EditorWindow import prepstr, get_accelerator
     from idlelib import Bindings
     from idlelib import WindowList
diff --git a/Lib/idlelib/run.py b/Lib/idlelib/run.py
index b731310..355f853 100644
--- a/Lib/idlelib/run.py
+++ b/Lib/idlelib/run.py
@@ -127,9 +127,9 @@
     server.handle_request() # A single request only
 
 def show_socket_error(err, address):
-    import Tkinter
-    import tkMessageBox
-    root = Tkinter.Tk()
+    import tkinter
+    import tkinter.messagebox as tkMessageBox
+    root = tkinter.Tk()
     root.withdraw()
     if err.args[0] == 61: # connection refused
         msg = "IDLE's subprocess can't connect to %s:%d.  This may be due "\
diff --git a/Lib/idlelib/tabbedpages.py b/Lib/idlelib/tabbedpages.py
index f8d89a4..f791702 100644
--- a/Lib/idlelib/tabbedpages.py
+++ b/Lib/idlelib/tabbedpages.py
@@ -7,7 +7,7 @@
 TabSet -- A widget containing tabs (buttons) in one or more rows.
 
 """
-from Tkinter import *
+from tkinter import *
 
 class InvalidNameError(Exception): pass
 class AlreadyExistsError(Exception): pass
diff --git a/Lib/idlelib/textView.py b/Lib/idlelib/textView.py
index 0e7e663..3f3c247 100644
--- a/Lib/idlelib/textView.py
+++ b/Lib/idlelib/textView.py
@@ -2,8 +2,8 @@
 
 """
 
-from Tkinter import *
-import tkMessageBox
+from tkinter import *
+import tkinter.messagebox as tkMessageBox
 
 class TextViewer(Toplevel):
     """A simple text viewer dialog for IDLE
@@ -68,7 +68,7 @@
         else:
             textFile = open(filename, 'r')
     except IOError:
-        import tkMessageBox
+        import tkinter.messagebox as tkMessageBox
         tkMessageBox.showerror(title='File Load Error',
                                message='Unable to load file %r .' % filename,
                                parent=parent)