diff --git a/Lib/idlelib/configDialog.py b/Lib/idlelib/configDialog.py
index bcf39c3..2bf3ac0 100644
--- a/Lib/idlelib/configDialog.py
+++ b/Lib/idlelib/configDialog.py
@@ -29,42 +29,44 @@
         """
         Toplevel.__init__(self, parent)
         self.parent = parent
+        if _htest:
+            parent.instance_dict = {}
         self.wm_withdraw()
 
         self.configure(borderwidth=5)
         self.title('IDLE Preferences')
-        if _htest:
-            parent.instance_dict = {}
-        self.geometry("+%d+%d" % (parent.winfo_rootx()+20,
-                parent.winfo_rooty()+(30 if not _htest else 150)))
+        self.geometry(
+                "+%d+%d" % (parent.winfo_rootx() + 20,
+                parent.winfo_rooty() + (30 if not _htest else 150)))
         #Theme Elements. Each theme element key is its display name.
         #The first value of the tuple is the sample area tag name.
         #The second value is the display name list sort index.
-        self.themeElements={'Normal Text':('normal','00'),
-            'Python Keywords':('keyword','01'),
-            'Python Definitions':('definition','02'),
+        self.themeElements={
+            'Normal Text':('normal', '00'),
+            'Python Keywords':('keyword', '01'),
+            'Python Definitions':('definition', '02'),
             'Python Builtins':('builtin', '03'),
-            'Python Comments':('comment','04'),
-            'Python Strings':('string','05'),
-            'Selected Text':('hilite','06'),
-            'Found Text':('hit','07'),
-            'Cursor':('cursor','08'),
-            'Error Text':('error','09'),
-            'Shell Normal Text':('console','10'),
-            'Shell Stdout Text':('stdout','11'),
-            'Shell Stderr Text':('stderr','12'),
+            'Python Comments':('comment', '04'),
+            'Python Strings':('string', '05'),
+            'Selected Text':('hilite', '06'),
+            'Found Text':('hit', '07'),
+            'Cursor':('cursor', '08'),
+            'Error Text':('error', '09'),
+            'Shell Normal Text':('console', '10'),
+            'Shell Stdout Text':('stdout', '11'),
+            'Shell Stderr Text':('stderr', '12'),
             }
         self.ResetChangedItems() #load initial values in changed items dict
         self.CreateWidgets()
-        self.resizable(height=FALSE,width=FALSE)
+        self.resizable(height=FALSE, width=FALSE)
         self.transient(parent)
         self.grab_set()
         self.protocol("WM_DELETE_WINDOW", self.Cancel)
         self.tabPages.focus_set()
         #key bindings for this dialog
-        #self.bind('<Escape>',self.Cancel) #dismiss dialog, no save
-        #self.bind('<Alt-a>',self.Apply) #apply changes, save
-        #self.bind('<F1>',self.Help) #context help
+        #self.bind('<Escape>', self.Cancel) #dismiss dialog, no save
+        #self.bind('<Alt-a>', self.Apply) #apply changes, save
+        #self.bind('<F1>', self.Help) #context help
         self.LoadConfigs()
         self.AttachVarCallbacks() #avoid callbacks during LoadConfigs
 
@@ -74,40 +76,40 @@
 
     def CreateWidgets(self):
         self.tabPages = TabbedPageSet(self,
-                page_names=['Fonts/Tabs','Highlighting','Keys','General'])
-        frameActionButtons = Frame(self,pady=2)
+                page_names=['Fonts/Tabs', 'Highlighting', 'Keys', 'General'])
+        frameActionButtons = Frame(self, pady=2)
         #action buttons
         if macosxSupport.isAquaTk():
             # Changing the default padding on OSX results in unreadable
             # text in the buttons
-            paddingArgs={}
+            paddingArgs = {}
         else:
-            paddingArgs={'padx':6, 'pady':3}
+            paddingArgs = {'padx':6, 'pady':3}
 
 # Comment out button creation and packing until implement self.Help
-##        self.buttonHelp = Button(frameActionButtons,text='Help',
-##                command=self.Help,takefocus=FALSE,
+##        self.buttonHelp = Button(frameActionButtons, text='Help',
+##                command=self.Help, takefocus=FALSE,
 ##                **paddingArgs)
-        self.buttonOk = Button(frameActionButtons,text='Ok',
-                command=self.Ok,takefocus=FALSE,
-                **paddingArgs)
-        self.buttonApply = Button(frameActionButtons,text='Apply',
-                command=self.Apply,takefocus=FALSE,
-                **paddingArgs)
-        self.buttonCancel = Button(frameActionButtons,text='Cancel',
-                command=self.Cancel,takefocus=FALSE,
-                **paddingArgs)
+        self.buttonOk = Button(
+                frameActionButtons, text='Ok',
+                command=self.Ok, takefocus=FALSE, **paddingArgs)
+        self.buttonApply = Button(
+                frameActionButtons, text='Apply',
+                command=self.Apply, takefocus=FALSE, **paddingArgs)
+        self.buttonCancel = Button(
+                frameActionButtons, text='Cancel',
+                command=self.Cancel, takefocus=FALSE, **paddingArgs)
         self.CreatePageFontTab()
         self.CreatePageHighlight()
         self.CreatePageKeys()
         self.CreatePageGeneral()
-##        self.buttonHelp.pack(side=RIGHT,padx=5)
-        self.buttonOk.pack(side=LEFT,padx=5)
-        self.buttonApply.pack(side=LEFT,padx=5)
-        self.buttonCancel.pack(side=LEFT,padx=5)
+##        self.buttonHelp.pack(side=RIGHT, padx=5)
+        self.buttonOk.pack(side=LEFT, padx=5)
+        self.buttonApply.pack(side=LEFT, padx=5)
+        self.buttonCancel.pack(side=LEFT, padx=5)
         frameActionButtons.pack(side=BOTTOM)
         Frame(self, height=2, borderwidth=0).pack(side=BOTTOM)
-        self.tabPages.pack(side=TOP,expand=TRUE,fill=BOTH)
+        self.tabPages.pack(side=TOP, expand=TRUE, fill=BOTH)
 
     def CreatePageFontTab(self):
         parent = self.parent
@@ -115,63 +117,66 @@
         self.fontBold = BooleanVar(parent)
         self.fontName = StringVar(parent)
         self.spaceNum = IntVar(parent)
-        self.editFont = tkFont.Font(parent,('courier',10,'normal'))
+        self.editFont = tkFont.Font(parent, ('courier', 10, 'normal'))
 
         ##widget creation
         #body frame
-        frame=self.tabPages.pages['Fonts/Tabs'].frame
+        frame = self.tabPages.pages['Fonts/Tabs'].frame
         #body section frames
-        frameFont=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                             text=' Base Editor Font ')
-        frameIndent=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                               text=' Indentation Width ')
+        frameFont = LabelFrame(
+                frame, borderwidth=2, relief=GROOVE, text=' Base Editor Font ')
+        frameIndent = LabelFrame(
+                frame, borderwidth=2, relief=GROOVE, text=' Indentation Width ')
         #frameFont
-        frameFontName=Frame(frameFont)
-        frameFontParam=Frame(frameFont)
-        labelFontNameTitle=Label(frameFontName,justify=LEFT,
-                text='Font Face :')
-        self.listFontName=Listbox(frameFontName,height=5,takefocus=FALSE,
-                exportselection=FALSE)
-        self.listFontName.bind('<ButtonRelease-1>',self.OnListFontButtonRelease)
-        scrollFont=Scrollbar(frameFontName)
+        frameFontName = Frame(frameFont)
+        frameFontParam = Frame(frameFont)
+        labelFontNameTitle = Label(
+                frameFontName, justify=LEFT, text='Font Face :')
+        self.listFontName = Listbox(
+                frameFontName, height=5, takefocus=FALSE, exportselection=FALSE)
+        self.listFontName.bind(
+                '<ButtonRelease-1>', self.OnListFontButtonRelease)
+        scrollFont = Scrollbar(frameFontName)
         scrollFont.config(command=self.listFontName.yview)
         self.listFontName.config(yscrollcommand=scrollFont.set)
-        labelFontSizeTitle=Label(frameFontParam,text='Size :')
-        self.optMenuFontSize=DynOptionMenu(frameFontParam,self.fontSize,None,
-            command=self.SetFontSample)
-        checkFontBold=Checkbutton(frameFontParam,variable=self.fontBold,
-            onvalue=1,offvalue=0,text='Bold',command=self.SetFontSample)
-        frameFontSample=Frame(frameFont,relief=SOLID,borderwidth=1)
-        self.labelFontSample=Label(frameFontSample,
-                text='AaBbCcDdEe\nFfGgHhIiJjK\n1234567890\n#:+=(){}[]',
-                justify=LEFT,font=self.editFont)
+        labelFontSizeTitle = Label(frameFontParam, text='Size :')
+        self.optMenuFontSize = DynOptionMenu(
+                frameFontParam, self.fontSize, None, command=self.SetFontSample)
+        checkFontBold = Checkbutton(
+                frameFontParam, variable=self.fontBold, onvalue=1,
+                offvalue=0, text='Bold', command=self.SetFontSample)
+        frameFontSample = Frame(frameFont, relief=SOLID, borderwidth=1)
+        self.labelFontSample = Label(
+                frameFontSample, justify=LEFT, font=self.editFont,
+                text='AaBbCcDdEe\nFfGgHhIiJjK\n1234567890\n#:+=(){}[]')
         #frameIndent
-        frameIndentSize=Frame(frameIndent)
-        labelSpaceNumTitle=Label(frameIndentSize, justify=LEFT,
-                                 text='Python Standard: 4 Spaces!')
-        self.scaleSpaceNum=Scale(frameIndentSize, variable=self.spaceNum,
-                                 orient='horizontal',
-                                 tickinterval=2, from_=2, to=16)
+        frameIndentSize = Frame(frameIndent)
+        labelSpaceNumTitle = Label(
+                frameIndentSize, justify=LEFT,
+                text='Python Standard: 4 Spaces!')
+        self.scaleSpaceNum = Scale(
+                frameIndentSize, variable=self.spaceNum,
+                orient='horizontal', tickinterval=2, from_=2, to=16)
 
         #widget packing
         #body
-        frameFont.pack(side=LEFT,padx=5,pady=5,expand=TRUE,fill=BOTH)
-        frameIndent.pack(side=LEFT,padx=5,pady=5,fill=Y)
+        frameFont.pack(side=LEFT, padx=5, pady=5, expand=TRUE, fill=BOTH)
+        frameIndent.pack(side=LEFT, padx=5, pady=5, fill=Y)
         #frameFont
-        frameFontName.pack(side=TOP,padx=5,pady=5,fill=X)
-        frameFontParam.pack(side=TOP,padx=5,pady=5,fill=X)
-        labelFontNameTitle.pack(side=TOP,anchor=W)
-        self.listFontName.pack(side=LEFT,expand=TRUE,fill=X)
-        scrollFont.pack(side=LEFT,fill=Y)
-        labelFontSizeTitle.pack(side=LEFT,anchor=W)
-        self.optMenuFontSize.pack(side=LEFT,anchor=W)
-        checkFontBold.pack(side=LEFT,anchor=W,padx=20)
-        frameFontSample.pack(side=TOP,padx=5,pady=5,expand=TRUE,fill=BOTH)
-        self.labelFontSample.pack(expand=TRUE,fill=BOTH)
+        frameFontName.pack(side=TOP, padx=5, pady=5, fill=X)
+        frameFontParam.pack(side=TOP, padx=5, pady=5, fill=X)
+        labelFontNameTitle.pack(side=TOP, anchor=W)
+        self.listFontName.pack(side=LEFT, expand=TRUE, fill=X)
+        scrollFont.pack(side=LEFT, fill=Y)
+        labelFontSizeTitle.pack(side=LEFT, anchor=W)
+        self.optMenuFontSize.pack(side=LEFT, anchor=W)
+        checkFontBold.pack(side=LEFT, anchor=W, padx=20)
+        frameFontSample.pack(side=TOP, padx=5, pady=5, expand=TRUE, fill=BOTH)
+        self.labelFontSample.pack(expand=TRUE, fill=BOTH)
         #frameIndent
-        frameIndentSize.pack(side=TOP,fill=X)
-        labelSpaceNumTitle.pack(side=TOP,anchor=W,padx=5)
-        self.scaleSpaceNum.pack(side=TOP,padx=5,fill=X)
+        frameIndentSize.pack(side=TOP, fill=X)
+        labelSpaceNumTitle.pack(side=TOP, anchor=W, padx=5)
+        self.scaleSpaceNum.pack(side=TOP, padx=5, fill=X)
         return frame
 
     def CreatePageHighlight(self):
@@ -186,84 +191,100 @@
 
         ##widget creation
         #body frame
-        frame=self.tabPages.pages['Highlighting'].frame
+        frame = self.tabPages.pages['Highlighting'].frame
         #body section frames
-        frameCustom=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                               text=' Custom Highlighting ')
-        frameTheme=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                              text=' Highlighting Theme ')
+        frameCustom = LabelFrame(frame, borderwidth=2, relief=GROOVE,
+                                 text=' Custom Highlighting ')
+        frameTheme = LabelFrame(frame, borderwidth=2, relief=GROOVE,
+                                text=' Highlighting Theme ')
         #frameCustom
-        self.textHighlightSample=Text(frameCustom,relief=SOLID,borderwidth=1,
-            font=('courier',12,''),cursor='hand2',width=21,height=11,
-            takefocus=FALSE,highlightthickness=0,wrap=NONE)
+        self.textHighlightSample=Text(
+                frameCustom, relief=SOLID, borderwidth=1,
+                font=('courier', 12, ''), cursor='hand2', width=21, height=11,
+                takefocus=FALSE, highlightthickness=0, wrap=NONE)
         text=self.textHighlightSample
-        text.bind('<Double-Button-1>',lambda e: 'break')
-        text.bind('<B1-Motion>',lambda e: 'break')
-        textAndTags=(('#you can click here','comment'),('\n','normal'),
-            ('#to choose items','comment'),('\n','normal'),('def','keyword'),
-            (' ','normal'),('func','definition'),('(param):','normal'),
-            ('\n  ','normal'),('"""string"""','string'),('\n  var0 = ','normal'),
-            ("'string'",'string'),('\n  var1 = ','normal'),("'selected'",'hilite'),
-            ('\n  var2 = ','normal'),("'found'",'hit'),
-            ('\n  var3 = ','normal'),('list', 'builtin'), ('(','normal'),
-            ('None', 'builtin'),(')\n\n','normal'),
-            (' error ','error'),(' ','normal'),('cursor |','cursor'),
-            ('\n ','normal'),('shell','console'),(' ','normal'),('stdout','stdout'),
-            (' ','normal'),('stderr','stderr'),('\n','normal'))
+        text.bind('<Double-Button-1>', lambda e: 'break')
+        text.bind('<B1-Motion>', lambda e: 'break')
+        textAndTags=(
+            ('#you can click here', 'comment'), ('\n', 'normal'),
+            ('#to choose items', 'comment'), ('\n', 'normal'),
+            ('def', 'keyword'), (' ', 'normal'),
+            ('func', 'definition'), ('(param):\n  ', 'normal'),
+            ('"""string"""', 'string'), ('\n  var0 = ', 'normal'),
+            ("'string'", 'string'), ('\n  var1 = ', 'normal'),
+            ("'selected'", 'hilite'), ('\n  var2 = ', 'normal'),
+            ("'found'", 'hit'), ('\n  var3 = ', 'normal'),
+            ('list', 'builtin'), ('(', 'normal'),
+            ('None', 'builtin'), (')\n\n', 'normal'),
+            (' error ', 'error'), (' ', 'normal'),
+            ('cursor |', 'cursor'), ('\n ', 'normal'),
+            ('shell', 'console'), (' ', 'normal'),
+            ('stdout', 'stdout'), (' ', 'normal'),
+            ('stderr', 'stderr'), ('\n', 'normal'))
         for txTa in textAndTags:
-            text.insert(END,txTa[0],txTa[1])
+            text.insert(END, txTa[0], txTa[1])
         for element in self.themeElements:
-            text.tag_bind(self.themeElements[element][0],'<ButtonPress-1>',
-                lambda event,elem=element: event.widget.winfo_toplevel()
-                .highlightTarget.set(elem))
+            def tem(event, elem=element):
+                event.widget.winfo_toplevel().highlightTarget.set(elem)
+            text.tag_bind(
+                    self.themeElements[element][0], '<ButtonPress-1>', tem)
         text.config(state=DISABLED)
-        self.frameColourSet=Frame(frameCustom,relief=SOLID,borderwidth=1)
-        frameFgBg=Frame(frameCustom)
-        buttonSetColour=Button(self.frameColourSet,text='Choose Colour for :',
-            command=self.GetColour,highlightthickness=0)
-        self.optMenuHighlightTarget=DynOptionMenu(self.frameColourSet,
-            self.highlightTarget,None,highlightthickness=0)#,command=self.SetHighlightTargetBinding
-        self.radioFg=Radiobutton(frameFgBg,variable=self.fgHilite,
-            value=1,text='Foreground',command=self.SetColourSampleBinding)
-        self.radioBg=Radiobutton(frameFgBg,variable=self.fgHilite,
-            value=0,text='Background',command=self.SetColourSampleBinding)
+        self.frameColourSet = Frame(frameCustom, relief=SOLID, borderwidth=1)
+        frameFgBg = Frame(frameCustom)
+        buttonSetColour = Button(
+                self.frameColourSet, text='Choose Colour for :',
+                command=self.GetColour, highlightthickness=0)
+        self.optMenuHighlightTarget = DynOptionMenu(
+                self.frameColourSet, self.highlightTarget, None,
+                highlightthickness=0) #, command=self.SetHighlightTargetBinding
+        self.radioFg = Radiobutton(
+                frameFgBg, variable=self.fgHilite, value=1,
+                text='Foreground', command=self.SetColourSampleBinding)
+        self.radioBg=Radiobutton(
+                frameFgBg, variable=self.fgHilite, value=0,
+                text='Background', command=self.SetColourSampleBinding)
         self.fgHilite.set(1)
-        buttonSaveCustomTheme=Button(frameCustom,
-            text='Save as New Custom Theme',command=self.SaveAsNewTheme)
+        buttonSaveCustomTheme = Button(
+                frameCustom, text='Save as New Custom Theme',
+                command=self.SaveAsNewTheme)
         #frameTheme
-        labelTypeTitle=Label(frameTheme,text='Select : ')
-        self.radioThemeBuiltin=Radiobutton(frameTheme,variable=self.themeIsBuiltin,
-            value=1,command=self.SetThemeType,text='a Built-in Theme')
-        self.radioThemeCustom=Radiobutton(frameTheme,variable=self.themeIsBuiltin,
-            value=0,command=self.SetThemeType,text='a Custom Theme')
-        self.optMenuThemeBuiltin=DynOptionMenu(frameTheme,
-            self.builtinTheme,None,command=None)
-        self.optMenuThemeCustom=DynOptionMenu(frameTheme,
-            self.customTheme,None,command=None)
-        self.buttonDeleteCustomTheme=Button(frameTheme,text='Delete Custom Theme',
+        labelTypeTitle = Label(frameTheme, text='Select : ')
+        self.radioThemeBuiltin = Radiobutton(
+                frameTheme, variable=self.themeIsBuiltin, value=1,
+                command=self.SetThemeType, text='a Built-in Theme')
+        self.radioThemeCustom = Radiobutton(
+                frameTheme, variable=self.themeIsBuiltin, value=0,
+                command=self.SetThemeType, text='a Custom Theme')
+        self.optMenuThemeBuiltin = DynOptionMenu(
+                frameTheme, self.builtinTheme, None, command=None)
+        self.optMenuThemeCustom=DynOptionMenu(
+                frameTheme, self.customTheme, None, command=None)
+        self.buttonDeleteCustomTheme=Button(
+                frameTheme, text='Delete Custom Theme',
                 command=self.DeleteCustomTheme)
 
         ##widget packing
         #body
-        frameCustom.pack(side=LEFT,padx=5,pady=5,expand=TRUE,fill=BOTH)
-        frameTheme.pack(side=LEFT,padx=5,pady=5,fill=Y)
+        frameCustom.pack(side=LEFT, padx=5, pady=5, expand=TRUE, fill=BOTH)
+        frameTheme.pack(side=LEFT, padx=5, pady=5, fill=Y)
         #frameCustom
-        self.frameColourSet.pack(side=TOP,padx=5,pady=5,expand=TRUE,fill=X)
-        frameFgBg.pack(side=TOP,padx=5,pady=0)
-        self.textHighlightSample.pack(side=TOP,padx=5,pady=5,expand=TRUE,
-            fill=BOTH)
-        buttonSetColour.pack(side=TOP,expand=TRUE,fill=X,padx=8,pady=4)
-        self.optMenuHighlightTarget.pack(side=TOP,expand=TRUE,fill=X,padx=8,pady=3)
-        self.radioFg.pack(side=LEFT,anchor=E)
-        self.radioBg.pack(side=RIGHT,anchor=W)
-        buttonSaveCustomTheme.pack(side=BOTTOM,fill=X,padx=5,pady=5)
+        self.frameColourSet.pack(side=TOP, padx=5, pady=5, expand=TRUE, fill=X)
+        frameFgBg.pack(side=TOP, padx=5, pady=0)
+        self.textHighlightSample.pack(
+                side=TOP, padx=5, pady=5, expand=TRUE, fill=BOTH)
+        buttonSetColour.pack(side=TOP, expand=TRUE, fill=X, padx=8, pady=4)
+        self.optMenuHighlightTarget.pack(
+                side=TOP, expand=TRUE, fill=X, padx=8, pady=3)
+        self.radioFg.pack(side=LEFT, anchor=E)
+        self.radioBg.pack(side=RIGHT, anchor=W)
+        buttonSaveCustomTheme.pack(side=BOTTOM, fill=X, padx=5, pady=5)
         #frameTheme
-        labelTypeTitle.pack(side=TOP,anchor=W,padx=5,pady=5)
-        self.radioThemeBuiltin.pack(side=TOP,anchor=W,padx=5)
-        self.radioThemeCustom.pack(side=TOP,anchor=W,padx=5,pady=2)
-        self.optMenuThemeBuiltin.pack(side=TOP,fill=X,padx=5,pady=5)
-        self.optMenuThemeCustom.pack(side=TOP,fill=X,anchor=W,padx=5,pady=5)
-        self.buttonDeleteCustomTheme.pack(side=TOP,fill=X,padx=5,pady=5)
+        labelTypeTitle.pack(side=TOP, anchor=W, padx=5, pady=5)
+        self.radioThemeBuiltin.pack(side=TOP, anchor=W, padx=5)
+        self.radioThemeCustom.pack(side=TOP, anchor=W, padx=5, pady=2)
+        self.optMenuThemeBuiltin.pack(side=TOP, fill=X, padx=5, pady=5)
+        self.optMenuThemeCustom.pack(side=TOP, fill=X, anchor=W, padx=5, pady=5)
+        self.buttonDeleteCustomTheme.pack(side=TOP, fill=X, padx=5, pady=5)
         return frame
 
     def CreatePageKeys(self):
@@ -276,63 +297,69 @@
 
         ##widget creation
         #body frame
-        frame=self.tabPages.pages['Keys'].frame
+        frame = self.tabPages.pages['Keys'].frame
         #body section frames
-        frameCustom=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                               text=' Custom Key Bindings ')
-        frameKeySets=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                           text=' Key Set ')
+        frameCustom = LabelFrame(
+                frame, borderwidth=2, relief=GROOVE,
+                text=' Custom Key Bindings ')
+        frameKeySets = LabelFrame(
+                frame, borderwidth=2, relief=GROOVE, text=' Key Set ')
         #frameCustom
-        frameTarget=Frame(frameCustom)
-        labelTargetTitle=Label(frameTarget,text='Action - Key(s)')
-        scrollTargetY=Scrollbar(frameTarget)
-        scrollTargetX=Scrollbar(frameTarget,orient=HORIZONTAL)
-        self.listBindings=Listbox(frameTarget,takefocus=FALSE,
-                exportselection=FALSE)
-        self.listBindings.bind('<ButtonRelease-1>',self.KeyBindingSelected)
+        frameTarget = Frame(frameCustom)
+        labelTargetTitle = Label(frameTarget, text='Action - Key(s)')
+        scrollTargetY = Scrollbar(frameTarget)
+        scrollTargetX = Scrollbar(frameTarget, orient=HORIZONTAL)
+        self.listBindings = Listbox(
+                frameTarget, takefocus=FALSE, exportselection=FALSE)
+        self.listBindings.bind('<ButtonRelease-1>', self.KeyBindingSelected)
         scrollTargetY.config(command=self.listBindings.yview)
         scrollTargetX.config(command=self.listBindings.xview)
         self.listBindings.config(yscrollcommand=scrollTargetY.set)
         self.listBindings.config(xscrollcommand=scrollTargetX.set)
-        self.buttonNewKeys=Button(frameCustom,text='Get New Keys for Selection',
-            command=self.GetNewKeys,state=DISABLED)
+        self.buttonNewKeys = Button(
+                frameCustom, text='Get New Keys for Selection',
+                command=self.GetNewKeys, state=DISABLED)
         #frameKeySets
         frames = [Frame(frameKeySets, padx=2, pady=2, borderwidth=0)
                   for i in range(2)]
-        self.radioKeysBuiltin=Radiobutton(frames[0],variable=self.keysAreBuiltin,
-            value=1,command=self.SetKeysType,text='Use a Built-in Key Set')
-        self.radioKeysCustom=Radiobutton(frames[0],variable=self.keysAreBuiltin,
-            value=0,command=self.SetKeysType,text='Use a Custom Key Set')
-        self.optMenuKeysBuiltin=DynOptionMenu(frames[0],
-            self.builtinKeys,None,command=None)
-        self.optMenuKeysCustom=DynOptionMenu(frames[0],
-            self.customKeys,None,command=None)
-        self.buttonDeleteCustomKeys=Button(frames[1],text='Delete Custom Key Set',
+        self.radioKeysBuiltin = Radiobutton(
+                frames[0], variable=self.keysAreBuiltin, value=1,
+                command=self.SetKeysType, text='Use a Built-in Key Set')
+        self.radioKeysCustom = Radiobutton(
+                frames[0], variable=self.keysAreBuiltin,  value=0,
+                command=self.SetKeysType, text='Use a Custom Key Set')
+        self.optMenuKeysBuiltin = DynOptionMenu(
+                frames[0], self.builtinKeys, None, command=None)
+        self.optMenuKeysCustom = DynOptionMenu(
+                frames[0], self.customKeys, None, command=None)
+        self.buttonDeleteCustomKeys = Button(
+                frames[1], text='Delete Custom Key Set',
                 command=self.DeleteCustomKeys)
-        buttonSaveCustomKeys=Button(frames[1],
-                text='Save as New Custom Key Set',command=self.SaveAsNewKeySet)
+        buttonSaveCustomKeys = Button(
+                frames[1], text='Save as New Custom Key Set',
+                command=self.SaveAsNewKeySet)
 
         ##widget packing
         #body
-        frameCustom.pack(side=BOTTOM,padx=5,pady=5,expand=TRUE,fill=BOTH)
-        frameKeySets.pack(side=BOTTOM,padx=5,pady=5,fill=BOTH)
+        frameCustom.pack(side=BOTTOM, padx=5, pady=5, expand=TRUE, fill=BOTH)
+        frameKeySets.pack(side=BOTTOM, padx=5, pady=5, fill=BOTH)
         #frameCustom
-        self.buttonNewKeys.pack(side=BOTTOM,fill=X,padx=5,pady=5)
-        frameTarget.pack(side=LEFT,padx=5,pady=5,expand=TRUE,fill=BOTH)
+        self.buttonNewKeys.pack(side=BOTTOM, fill=X, padx=5, pady=5)
+        frameTarget.pack(side=LEFT, padx=5, pady=5, expand=TRUE, fill=BOTH)
         #frame target
-        frameTarget.columnconfigure(0,weight=1)
-        frameTarget.rowconfigure(1,weight=1)
-        labelTargetTitle.grid(row=0,column=0,columnspan=2,sticky=W)
-        self.listBindings.grid(row=1,column=0,sticky=NSEW)
-        scrollTargetY.grid(row=1,column=1,sticky=NS)
-        scrollTargetX.grid(row=2,column=0,sticky=EW)
+        frameTarget.columnconfigure(0, weight=1)
+        frameTarget.rowconfigure(1, weight=1)
+        labelTargetTitle.grid(row=0, column=0, columnspan=2, sticky=W)
+        self.listBindings.grid(row=1, column=0, sticky=NSEW)
+        scrollTargetY.grid(row=1, column=1, sticky=NS)
+        scrollTargetX.grid(row=2, column=0, sticky=EW)
         #frameKeySets
         self.radioKeysBuiltin.grid(row=0, column=0, sticky=W+NS)
         self.radioKeysCustom.grid(row=1, column=0, sticky=W+NS)
         self.optMenuKeysBuiltin.grid(row=0, column=1, sticky=NSEW)
         self.optMenuKeysCustom.grid(row=1, column=1, sticky=NSEW)
-        self.buttonDeleteCustomKeys.pack(side=LEFT,fill=X,expand=True,padx=2)
-        buttonSaveCustomKeys.pack(side=LEFT,fill=X,expand=True,padx=2)
+        self.buttonDeleteCustomKeys.pack(side=LEFT, fill=X, expand=True, padx=2)
+        buttonSaveCustomKeys.pack(side=LEFT, fill=X, expand=True, padx=2)
         frames[0].pack(side=TOP, fill=BOTH, expand=True)
         frames[1].pack(side=TOP, fill=X, expand=True, pady=2)
         return frame
@@ -350,223 +377,235 @@
 
         #widget creation
         #body
-        frame=self.tabPages.pages['General'].frame
+        frame = self.tabPages.pages['General'].frame
         #body section frames
-        frameRun=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                            text=' Startup Preferences ')
-        frameSave=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                             text=' Autosave Preferences ')
-        frameWinSize=Frame(frame,borderwidth=2,relief=GROOVE)
-        frameParaSize=Frame(frame,borderwidth=2,relief=GROOVE)
-        frameEncoding=Frame(frame,borderwidth=2,relief=GROOVE)
-        frameHelp=LabelFrame(frame,borderwidth=2,relief=GROOVE,
-                             text=' Additional Help Sources ')
+        frameRun = LabelFrame(frame, borderwidth=2, relief=GROOVE,
+                              text=' Startup Preferences ')
+        frameSave = LabelFrame(frame, borderwidth=2, relief=GROOVE,
+                               text=' Autosave Preferences ')
+        frameWinSize = Frame(frame, borderwidth=2, relief=GROOVE)
+        frameParaSize = Frame(frame, borderwidth=2, relief=GROOVE)
+        frameEncoding = Frame(frame, borderwidth=2, relief=GROOVE)
+        frameHelp = LabelFrame(frame, borderwidth=2, relief=GROOVE,
+                               text=' Additional Help Sources ')
         #frameRun
-        labelRunChoiceTitle=Label(frameRun,text='At Startup')
-        radioStartupEdit=Radiobutton(frameRun,variable=self.startupEdit,
-            value=1,command=self.SetKeysType,text="Open Edit Window")
-        radioStartupShell=Radiobutton(frameRun,variable=self.startupEdit,
-            value=0,command=self.SetKeysType,text='Open Shell Window')
+        labelRunChoiceTitle = Label(frameRun, text='At Startup')
+        radioStartupEdit = Radiobutton(
+                frameRun, variable=self.startupEdit, value=1,
+                command=self.SetKeysType, text="Open Edit Window")
+        radioStartupShell = Radiobutton(
+                frameRun, variable=self.startupEdit, value=0,
+                command=self.SetKeysType, text='Open Shell Window')
         #frameSave
-        labelRunSaveTitle=Label(frameSave,text='At Start of Run (F5)  ')
-        radioSaveAsk=Radiobutton(frameSave,variable=self.autoSave,
-            value=0,command=self.SetKeysType,text="Prompt to Save")
-        radioSaveAuto=Radiobutton(frameSave,variable=self.autoSave,
-            value=1,command=self.SetKeysType,text='No Prompt')
+        labelRunSaveTitle = Label(frameSave, text='At Start of Run (F5)  ')
+        radioSaveAsk = Radiobutton(
+                frameSave, variable=self.autoSave, value=0,
+                command=self.SetKeysType, text="Prompt to Save")
+        radioSaveAuto = Radiobutton(
+                frameSave, variable=self.autoSave, value=1,
+                command=self.SetKeysType, text='No Prompt')
         #frameWinSize
-        labelWinSizeTitle=Label(frameWinSize,text='Initial Window Size'+
-                '  (in characters)')
-        labelWinWidthTitle=Label(frameWinSize,text='Width')
-        entryWinWidth=Entry(frameWinSize,textvariable=self.winWidth,
-                width=3)
-        labelWinHeightTitle=Label(frameWinSize,text='Height')
-        entryWinHeight=Entry(frameWinSize,textvariable=self.winHeight,
-                width=3)
+        labelWinSizeTitle = Label(
+                frameWinSize, text='Initial Window Size  (in characters)')
+        labelWinWidthTitle = Label(frameWinSize, text='Width')
+        entryWinWidth = Entry(
+                frameWinSize, textvariable=self.winWidth, width=3)
+        labelWinHeightTitle = Label(frameWinSize, text='Height')
+        entryWinHeight = Entry(
+                frameWinSize, textvariable=self.winHeight, width=3)
         #paragraphFormatWidth
-        labelParaWidthTitle=Label(frameParaSize,text='Paragraph reformat'+
-                ' width (in characters)')
-        entryParaWidth=Entry(frameParaSize,textvariable=self.paraWidth,
-                width=3)
+        labelParaWidthTitle = Label(
+                frameParaSize, text='Paragraph reformat width (in characters)')
+        entryParaWidth = Entry(
+                frameParaSize, textvariable=self.paraWidth, width=3)
         #frameEncoding
-        labelEncodingTitle=Label(frameEncoding,text="Default Source Encoding")
-        radioEncLocale=Radiobutton(frameEncoding,variable=self.encoding,
-            value="locale",text="Locale-defined")
-        radioEncUTF8=Radiobutton(frameEncoding,variable=self.encoding,
-            value="utf-8",text="UTF-8")
-        radioEncNone=Radiobutton(frameEncoding,variable=self.encoding,
-            value="none",text="None")
+        labelEncodingTitle = Label(
+                frameEncoding, text="Default Source Encoding")
+        radioEncLocale = Radiobutton(
+                frameEncoding, variable=self.encoding,
+                value="locale", text="Locale-defined")
+        radioEncUTF8 = Radiobutton(
+                frameEncoding, variable=self.encoding,
+                value="utf-8", text="UTF-8")
+        radioEncNone = Radiobutton(
+                frameEncoding, variable=self.encoding,
+                value="none", text="None")
         #frameHelp
-        frameHelpList=Frame(frameHelp)
-        frameHelpListButtons=Frame(frameHelpList)
-        scrollHelpList=Scrollbar(frameHelpList)
-        self.listHelp=Listbox(frameHelpList,height=5,takefocus=FALSE,
+        frameHelpList = Frame(frameHelp)
+        frameHelpListButtons = Frame(frameHelpList)
+        scrollHelpList = Scrollbar(frameHelpList)
+        self.listHelp = Listbox(
+                frameHelpList, height=5, takefocus=FALSE,
                 exportselection=FALSE)
         scrollHelpList.config(command=self.listHelp.yview)
         self.listHelp.config(yscrollcommand=scrollHelpList.set)
-        self.listHelp.bind('<ButtonRelease-1>',self.HelpSourceSelected)
-        self.buttonHelpListEdit=Button(frameHelpListButtons,text='Edit',
-                state=DISABLED,width=8,command=self.HelpListItemEdit)
-        self.buttonHelpListAdd=Button(frameHelpListButtons,text='Add',
-                width=8,command=self.HelpListItemAdd)
-        self.buttonHelpListRemove=Button(frameHelpListButtons,text='Remove',
-                state=DISABLED,width=8,command=self.HelpListItemRemove)
+        self.listHelp.bind('<ButtonRelease-1>', self.HelpSourceSelected)
+        self.buttonHelpListEdit = Button(
+                frameHelpListButtons, text='Edit', state=DISABLED,
+                width=8, command=self.HelpListItemEdit)
+        self.buttonHelpListAdd = Button(
+                frameHelpListButtons, text='Add',
+                width=8, command=self.HelpListItemAdd)
+        self.buttonHelpListRemove = Button(
+                frameHelpListButtons, text='Remove', state=DISABLED,
+                width=8, command=self.HelpListItemRemove)
 
         #widget packing
         #body
-        frameRun.pack(side=TOP,padx=5,pady=5,fill=X)
-        frameSave.pack(side=TOP,padx=5,pady=5,fill=X)
-        frameWinSize.pack(side=TOP,padx=5,pady=5,fill=X)
-        frameParaSize.pack(side=TOP,padx=5,pady=5,fill=X)
-        frameEncoding.pack(side=TOP,padx=5,pady=5,fill=X)
-        frameHelp.pack(side=TOP,padx=5,pady=5,expand=TRUE,fill=BOTH)
+        frameRun.pack(side=TOP, padx=5, pady=5, fill=X)
+        frameSave.pack(side=TOP, padx=5, pady=5, fill=X)
+        frameWinSize.pack(side=TOP, padx=5, pady=5, fill=X)
+        frameParaSize.pack(side=TOP, padx=5, pady=5, fill=X)
+        frameEncoding.pack(side=TOP, padx=5, pady=5, fill=X)
+        frameHelp.pack(side=TOP, padx=5, pady=5, expand=TRUE, fill=BOTH)
         #frameRun
-        labelRunChoiceTitle.pack(side=LEFT,anchor=W,padx=5,pady=5)
-        radioStartupShell.pack(side=RIGHT,anchor=W,padx=5,pady=5)
-        radioStartupEdit.pack(side=RIGHT,anchor=W,padx=5,pady=5)
+        labelRunChoiceTitle.pack(side=LEFT, anchor=W, padx=5, pady=5)
+        radioStartupShell.pack(side=RIGHT, anchor=W, padx=5, pady=5)
+        radioStartupEdit.pack(side=RIGHT, anchor=W, padx=5, pady=5)
         #frameSave
-        labelRunSaveTitle.pack(side=LEFT,anchor=W,padx=5,pady=5)
-        radioSaveAuto.pack(side=RIGHT,anchor=W,padx=5,pady=5)
-        radioSaveAsk.pack(side=RIGHT,anchor=W,padx=5,pady=5)
+        labelRunSaveTitle.pack(side=LEFT, anchor=W, padx=5, pady=5)
+        radioSaveAuto.pack(side=RIGHT, anchor=W, padx=5, pady=5)
+        radioSaveAsk.pack(side=RIGHT, anchor=W, padx=5, pady=5)
         #frameWinSize
-        labelWinSizeTitle.pack(side=LEFT,anchor=W,padx=5,pady=5)
-        entryWinHeight.pack(side=RIGHT,anchor=E,padx=10,pady=5)
-        labelWinHeightTitle.pack(side=RIGHT,anchor=E,pady=5)
-        entryWinWidth.pack(side=RIGHT,anchor=E,padx=10,pady=5)
-        labelWinWidthTitle.pack(side=RIGHT,anchor=E,pady=5)
+        labelWinSizeTitle.pack(side=LEFT, anchor=W, padx=5, pady=5)
+        entryWinHeight.pack(side=RIGHT, anchor=E, padx=10, pady=5)
+        labelWinHeightTitle.pack(side=RIGHT, anchor=E, pady=5)
+        entryWinWidth.pack(side=RIGHT, anchor=E, padx=10, pady=5)
+        labelWinWidthTitle.pack(side=RIGHT, anchor=E, pady=5)
         #paragraphFormatWidth
-        labelParaWidthTitle.pack(side=LEFT,anchor=W,padx=5,pady=5)
-        entryParaWidth.pack(side=RIGHT,anchor=E,padx=10,pady=5)
+        labelParaWidthTitle.pack(side=LEFT, anchor=W, padx=5, pady=5)
+        entryParaWidth.pack(side=RIGHT, anchor=E, padx=10, pady=5)
         #frameEncoding
-        labelEncodingTitle.pack(side=LEFT,anchor=W,padx=5,pady=5)
-        radioEncNone.pack(side=RIGHT,anchor=E,pady=5)
-        radioEncUTF8.pack(side=RIGHT,anchor=E,pady=5)
-        radioEncLocale.pack(side=RIGHT,anchor=E,pady=5)
+        labelEncodingTitle.pack(side=LEFT, anchor=W, padx=5, pady=5)
+        radioEncNone.pack(side=RIGHT, anchor=E, pady=5)
+        radioEncUTF8.pack(side=RIGHT, anchor=E, pady=5)
+        radioEncLocale.pack(side=RIGHT, anchor=E, pady=5)
         #frameHelp
-        frameHelpListButtons.pack(side=RIGHT,padx=5,pady=5,fill=Y)
-        frameHelpList.pack(side=TOP,padx=5,pady=5,expand=TRUE,fill=BOTH)
-        scrollHelpList.pack(side=RIGHT,anchor=W,fill=Y)
-        self.listHelp.pack(side=LEFT,anchor=E,expand=TRUE,fill=BOTH)
-        self.buttonHelpListEdit.pack(side=TOP,anchor=W,pady=5)
-        self.buttonHelpListAdd.pack(side=TOP,anchor=W)
-        self.buttonHelpListRemove.pack(side=TOP,anchor=W,pady=5)
+        frameHelpListButtons.pack(side=RIGHT, padx=5, pady=5, fill=Y)
+        frameHelpList.pack(side=TOP, padx=5, pady=5, expand=TRUE, fill=BOTH)
+        scrollHelpList.pack(side=RIGHT, anchor=W, fill=Y)
+        self.listHelp.pack(side=LEFT, anchor=E, expand=TRUE, fill=BOTH)
+        self.buttonHelpListEdit.pack(side=TOP, anchor=W, pady=5)
+        self.buttonHelpListAdd.pack(side=TOP, anchor=W)
+        self.buttonHelpListRemove.pack(side=TOP, anchor=W, pady=5)
         return frame
 
     def AttachVarCallbacks(self):
-        self.fontSize.trace_variable('w',self.VarChanged_fontSize)
-        self.fontName.trace_variable('w',self.VarChanged_fontName)
-        self.fontBold.trace_variable('w',self.VarChanged_fontBold)
-        self.spaceNum.trace_variable('w',self.VarChanged_spaceNum)
-        self.colour.trace_variable('w',self.VarChanged_colour)
-        self.builtinTheme.trace_variable('w',self.VarChanged_builtinTheme)
-        self.customTheme.trace_variable('w',self.VarChanged_customTheme)
-        self.themeIsBuiltin.trace_variable('w',self.VarChanged_themeIsBuiltin)
-        self.highlightTarget.trace_variable('w',self.VarChanged_highlightTarget)
-        self.keyBinding.trace_variable('w',self.VarChanged_keyBinding)
-        self.builtinKeys.trace_variable('w',self.VarChanged_builtinKeys)
-        self.customKeys.trace_variable('w',self.VarChanged_customKeys)
-        self.keysAreBuiltin.trace_variable('w',self.VarChanged_keysAreBuiltin)
-        self.winWidth.trace_variable('w',self.VarChanged_winWidth)
-        self.winHeight.trace_variable('w',self.VarChanged_winHeight)
-        self.paraWidth.trace_variable('w',self.VarChanged_paraWidth)
-        self.startupEdit.trace_variable('w',self.VarChanged_startupEdit)
-        self.autoSave.trace_variable('w',self.VarChanged_autoSave)
-        self.encoding.trace_variable('w',self.VarChanged_encoding)
+        self.fontSize.trace_variable('w', self.VarChanged_fontSize)
+        self.fontName.trace_variable('w', self.VarChanged_fontName)
+        self.fontBold.trace_variable('w', self.VarChanged_fontBold)
+        self.spaceNum.trace_variable('w', self.VarChanged_spaceNum)
+        self.colour.trace_variable('w', self.VarChanged_colour)
+        self.builtinTheme.trace_variable('w', self.VarChanged_builtinTheme)
+        self.customTheme.trace_variable('w', self.VarChanged_customTheme)
+        self.themeIsBuiltin.trace_variable('w', self.VarChanged_themeIsBuiltin)
+        self.highlightTarget.trace_variable('w', self.VarChanged_highlightTarget)
+        self.keyBinding.trace_variable('w', self.VarChanged_keyBinding)
+        self.builtinKeys.trace_variable('w', self.VarChanged_builtinKeys)
+        self.customKeys.trace_variable('w', self.VarChanged_customKeys)
+        self.keysAreBuiltin.trace_variable('w', self.VarChanged_keysAreBuiltin)
+        self.winWidth.trace_variable('w', self.VarChanged_winWidth)
+        self.winHeight.trace_variable('w', self.VarChanged_winHeight)
+        self.paraWidth.trace_variable('w', self.VarChanged_paraWidth)
+        self.startupEdit.trace_variable('w', self.VarChanged_startupEdit)
+        self.autoSave.trace_variable('w', self.VarChanged_autoSave)
+        self.encoding.trace_variable('w', self.VarChanged_encoding)
 
-    def VarChanged_fontSize(self,*params):
-        value=self.fontSize.get()
-        self.AddChangedItem('main','EditorWindow','font-size',value)
+    def VarChanged_fontSize(self, *params):
+        value = self.fontSize.get()
+        self.AddChangedItem('main', 'EditorWindow', 'font-size', value)
 
-    def VarChanged_fontName(self,*params):
-        value=self.fontName.get()
-        self.AddChangedItem('main','EditorWindow','font',value)
+    def VarChanged_fontName(self, *params):
+        value = self.fontName.get()
+        self.AddChangedItem('main', 'EditorWindow', 'font', value)
 
-    def VarChanged_fontBold(self,*params):
-        value=self.fontBold.get()
-        self.AddChangedItem('main','EditorWindow','font-bold',value)
+    def VarChanged_fontBold(self, *params):
+        value = self.fontBold.get()
+        self.AddChangedItem('main', 'EditorWindow', 'font-bold', value)
 
-    def VarChanged_spaceNum(self,*params):
-        value=self.spaceNum.get()
-        self.AddChangedItem('main','Indent','num-spaces',value)
+    def VarChanged_spaceNum(self, *params):
+        value = self.spaceNum.get()
+        self.AddChangedItem('main', 'Indent', 'num-spaces', value)
 
-    def VarChanged_colour(self,*params):
+    def VarChanged_colour(self, *params):
         self.OnNewColourSet()
 
-    def VarChanged_builtinTheme(self,*params):
-        value=self.builtinTheme.get()
-        self.AddChangedItem('main','Theme','name',value)
+    def VarChanged_builtinTheme(self, *params):
+        value = self.builtinTheme.get()
+        self.AddChangedItem('main', 'Theme', 'name', value)
         self.PaintThemeSample()
 
-    def VarChanged_customTheme(self,*params):
-        value=self.customTheme.get()
+    def VarChanged_customTheme(self, *params):
+        value = self.customTheme.get()
         if value != '- no custom themes -':
-            self.AddChangedItem('main','Theme','name',value)
+            self.AddChangedItem('main', 'Theme', 'name', value)
             self.PaintThemeSample()
 
-    def VarChanged_themeIsBuiltin(self,*params):
-        value=self.themeIsBuiltin.get()
-        self.AddChangedItem('main','Theme','default',value)
+    def VarChanged_themeIsBuiltin(self, *params):
+        value = self.themeIsBuiltin.get()
+        self.AddChangedItem('main', 'Theme', 'default', value)
         if value:
             self.VarChanged_builtinTheme()
         else:
             self.VarChanged_customTheme()
 
-    def VarChanged_highlightTarget(self,*params):
+    def VarChanged_highlightTarget(self, *params):
         self.SetHighlightTarget()
 
-    def VarChanged_keyBinding(self,*params):
-        value=self.keyBinding.get()
-        keySet=self.customKeys.get()
-        event=self.listBindings.get(ANCHOR).split()[0]
+    def VarChanged_keyBinding(self, *params):
+        value = self.keyBinding.get()
+        keySet = self.customKeys.get()
+        event = self.listBindings.get(ANCHOR).split()[0]
         if idleConf.IsCoreBinding(event):
             #this is a core keybinding
-            self.AddChangedItem('keys',keySet,event,value)
+            self.AddChangedItem('keys', keySet, event, value)
         else: #this is an extension key binding
-            extName=idleConf.GetExtnNameForEvent(event)
-            extKeybindSection=extName+'_cfgBindings'
-            self.AddChangedItem('extensions',extKeybindSection,event,value)
+            extName = idleConf.GetExtnNameForEvent(event)
+            extKeybindSection = extName + '_cfgBindings'
+            self.AddChangedItem('extensions', extKeybindSection, event, value)
 
-    def VarChanged_builtinKeys(self,*params):
-        value=self.builtinKeys.get()
-        self.AddChangedItem('main','Keys','name',value)
+    def VarChanged_builtinKeys(self, *params):
+        value = self.builtinKeys.get()
+        self.AddChangedItem('main', 'Keys', 'name', value)
         self.LoadKeysList(value)
 
-    def VarChanged_customKeys(self,*params):
-        value=self.customKeys.get()
+    def VarChanged_customKeys(self, *params):
+        value = self.customKeys.get()
         if value != '- no custom keys -':
-            self.AddChangedItem('main','Keys','name',value)
+            self.AddChangedItem('main', 'Keys', 'name', value)
             self.LoadKeysList(value)
 
-    def VarChanged_keysAreBuiltin(self,*params):
-        value=self.keysAreBuiltin.get()
-        self.AddChangedItem('main','Keys','default',value)
+    def VarChanged_keysAreBuiltin(self, *params):
+        value = self.keysAreBuiltin.get()
+        self.AddChangedItem('main', 'Keys', 'default', value)
         if value:
             self.VarChanged_builtinKeys()
         else:
             self.VarChanged_customKeys()
 
-    def VarChanged_winWidth(self,*params):
-        value=self.winWidth.get()
-        self.AddChangedItem('main','EditorWindow','width',value)
+    def VarChanged_winWidth(self, *params):
+        value = self.winWidth.get()
+        self.AddChangedItem('main', 'EditorWindow', 'width', value)
 
-    def VarChanged_winHeight(self,*params):
-        value=self.winHeight.get()
-        self.AddChangedItem('main','EditorWindow','height',value)
+    def VarChanged_winHeight(self, *params):
+        value = self.winHeight.get()
+        self.AddChangedItem('main', 'EditorWindow', 'height', value)
 
-    def VarChanged_paraWidth(self,*params):
-        value=self.paraWidth.get()
-        self.AddChangedItem('main','FormatParagraph','paragraph',value)
+    def VarChanged_paraWidth(self, *params):
+        value = self.paraWidth.get()
+        self.AddChangedItem('main', 'FormatParagraph', 'paragraph', value)
 
-    def VarChanged_startupEdit(self,*params):
-        value=self.startupEdit.get()
-        self.AddChangedItem('main','General','editor-on-startup',value)
+    def VarChanged_startupEdit(self, *params):
+        value = self.startupEdit.get()
+        self.AddChangedItem('main', 'General', 'editor-on-startup', value)
 
-    def VarChanged_autoSave(self,*params):
-        value=self.autoSave.get()
-        self.AddChangedItem('main','General','autosave',value)
+    def VarChanged_autoSave(self, *params):
+        value = self.autoSave.get()
+        self.AddChangedItem('main', 'General', 'autosave', value)
 
-    def VarChanged_encoding(self,*params):
-        value=self.encoding.get()
-        self.AddChangedItem('main','EditorWindow','encoding',value)
+    def VarChanged_encoding(self, *params):
+        value = self.encoding.get()
+        self.AddChangedItem('main', 'EditorWindow', 'encoding', value)
 
     def ResetChangedItems(self):
         #When any config item is changed in this dialog, an entry
@@ -574,24 +613,25 @@
         #dictionary. The key should be the config file section name and the
         #value a dictionary, whose key:value pairs are item=value pairs for
         #that config file section.
-        self.changedItems={'main':{},'highlight':{},'keys':{},'extensions':{}}
+        self.changedItems = {'main':{}, 'highlight':{}, 'keys':{},
+                             'extensions':{}}
 
-    def AddChangedItem(self,type,section,item,value):
-        value=str(value) #make sure we use a string
-        if section not in self.changedItems[type]:
-            self.changedItems[type][section]={}
-        self.changedItems[type][section][item]=value
+    def AddChangedItem(self, typ, section, item, value):
+        value = str(value) #make sure we use a string
+        if section not in self.changedItems[typ]:
+            self.changedItems[typ][section] = {}
+        self.changedItems[typ][section][item] = value
 
     def GetDefaultItems(self):
-        dItems={'main':{},'highlight':{},'keys':{},'extensions':{}}
+        dItems={'main':{}, 'highlight':{}, 'keys':{}, 'extensions':{}}
         for configType in dItems:
-            sections=idleConf.GetSectionList('default',configType)
+            sections = idleConf.GetSectionList('default', configType)
             for section in sections:
-                dItems[configType][section]={}
-                options=idleConf.defaultCfg[configType].GetOptionList(section)
+                dItems[configType][section] = {}
+                options = idleConf.defaultCfg[configType].GetOptionList(section)
                 for option in options:
-                    dItems[configType][section][option]=(
-                            idleConf.defaultCfg[configType].Get(section,option))
+                    dItems[configType][section][option] = (
+                            idleConf.defaultCfg[configType].Get(section, option))
         return dItems
 
     def SetThemeType(self):
@@ -617,26 +657,26 @@
             self.buttonDeleteCustomKeys.config(state=NORMAL)
 
     def GetNewKeys(self):
-        listIndex=self.listBindings.index(ANCHOR)
-        binding=self.listBindings.get(listIndex)
-        bindName=binding.split()[0] #first part, up to first space
+        listIndex = self.listBindings.index(ANCHOR)
+        binding = self.listBindings.get(listIndex)
+        bindName = binding.split()[0] #first part, up to first space
         if self.keysAreBuiltin.get():
-            currentKeySetName=self.builtinKeys.get()
+            currentKeySetName = self.builtinKeys.get()
         else:
-            currentKeySetName=self.customKeys.get()
-        currentBindings=idleConf.GetCurrentKeySet()
+            currentKeySetName = self.customKeys.get()
+        currentBindings = idleConf.GetCurrentKeySet()
         if currentKeySetName in self.changedItems['keys']: #unsaved changes
-            keySetChanges=self.changedItems['keys'][currentKeySetName]
+            keySetChanges = self.changedItems['keys'][currentKeySetName]
             for event in keySetChanges:
-                currentBindings[event]=keySetChanges[event].split()
-        currentKeySequences=currentBindings.values()
-        newKeys=GetKeysDialog(self,'Get New Keys',bindName,
+                currentBindings[event] = keySetChanges[event].split()
+        currentKeySequences = currentBindings.values()
+        newKeys = GetKeysDialog(self, 'Get New Keys', bindName,
                 currentKeySequences).result
         if newKeys: #new keys were specified
             if self.keysAreBuiltin.get(): #current key set is a built-in
-                message=('Your changes will be saved as a new Custom Key Set. '+
-                        'Enter a name for your new Custom Key Set below.')
-                newKeySet=self.GetNewKeysName(message)
+                message = ('Your changes will be saved as a new Custom Key Set.'
+                           ' Enter a name for your new Custom Key Set below.')
+                newKeySet = self.GetNewKeysName(message)
                 if not newKeySet: #user cancelled custom key set creation
                     self.listBindings.select_set(listIndex)
                     self.listBindings.select_anchor(listIndex)
@@ -644,7 +684,7 @@
                 else: #create new custom key set based on previously active key set
                     self.CreateNewKeySet(newKeySet)
             self.listBindings.delete(listIndex)
-            self.listBindings.insert(listIndex,bindName+' - '+newKeys)
+            self.listBindings.insert(listIndex, bindName+' - '+newKeys)
             self.listBindings.select_set(listIndex)
             self.listBindings.select_anchor(listIndex)
             self.keyBinding.set(newKeys)
@@ -652,65 +692,65 @@
             self.listBindings.select_set(listIndex)
             self.listBindings.select_anchor(listIndex)
 
-    def GetNewKeysName(self,message):
-        usedNames=(idleConf.GetSectionList('user','keys')+
-                idleConf.GetSectionList('default','keys'))
-        newKeySet=GetCfgSectionNameDialog(self,'New Custom Key Set',
-                message,usedNames).result
+    def GetNewKeysName(self, message):
+        usedNames = (idleConf.GetSectionList('user', 'keys') +
+                idleConf.GetSectionList('default', 'keys'))
+        newKeySet = GetCfgSectionNameDialog(
+                self, 'New Custom Key Set', message, usedNames).result
         return newKeySet
 
     def SaveAsNewKeySet(self):
-        newKeysName=self.GetNewKeysName('New Key Set Name:')
+        newKeysName = self.GetNewKeysName('New Key Set Name:')
         if newKeysName:
             self.CreateNewKeySet(newKeysName)
 
-    def KeyBindingSelected(self,event):
+    def KeyBindingSelected(self, event):
         self.buttonNewKeys.config(state=NORMAL)
 
-    def CreateNewKeySet(self,newKeySetName):
+    def CreateNewKeySet(self, newKeySetName):
         #creates new custom key set based on the previously active key set,
         #and makes the new key set active
         if self.keysAreBuiltin.get():
-            prevKeySetName=self.builtinKeys.get()
+            prevKeySetName = self.builtinKeys.get()
         else:
-            prevKeySetName=self.customKeys.get()
-        prevKeys=idleConf.GetCoreKeys(prevKeySetName)
-        newKeys={}
+            prevKeySetName = self.customKeys.get()
+        prevKeys = idleConf.GetCoreKeys(prevKeySetName)
+        newKeys = {}
         for event in prevKeys: #add key set to changed items
-            eventName=event[2:-2] #trim off the angle brackets
-            binding=' '.join(prevKeys[event])
-            newKeys[eventName]=binding
+            eventName = event[2:-2] #trim off the angle brackets
+            binding = ' '.join(prevKeys[event])
+            newKeys[eventName] = binding
         #handle any unsaved changes to prev key set
         if prevKeySetName in self.changedItems['keys']:
-            keySetChanges=self.changedItems['keys'][prevKeySetName]
+            keySetChanges = self.changedItems['keys'][prevKeySetName]
             for event in keySetChanges:
-                newKeys[event]=keySetChanges[event]
+                newKeys[event] = keySetChanges[event]
         #save the new theme
-        self.SaveNewKeySet(newKeySetName,newKeys)
+        self.SaveNewKeySet(newKeySetName, newKeys)
         #change gui over to the new key set
-        customKeyList=idleConf.GetSectionList('user','keys')
+        customKeyList = idleConf.GetSectionList('user', 'keys')
         customKeyList.sort()
-        self.optMenuKeysCustom.SetMenu(customKeyList,newKeySetName)
+        self.optMenuKeysCustom.SetMenu(customKeyList, newKeySetName)
         self.keysAreBuiltin.set(0)
         self.SetKeysType()
 
-    def LoadKeysList(self,keySetName):
-        reselect=0
-        newKeySet=0
+    def LoadKeysList(self, keySetName):
+        reselect = 0
+        newKeySet = 0
         if self.listBindings.curselection():
-            reselect=1
-            listIndex=self.listBindings.index(ANCHOR)
-        keySet=idleConf.GetKeySet(keySetName)
-        bindNames=keySet.keys()
+            reselect = 1
+            listIndex = self.listBindings.index(ANCHOR)
+        keySet = idleConf.GetKeySet(keySetName)
+        bindNames = keySet.keys()
         bindNames.sort()
-        self.listBindings.delete(0,END)
+        self.listBindings.delete(0, END)
         for bindName in bindNames:
-            key=' '.join(keySet[bindName]) #make key(s) into a string
-            bindName=bindName[2:-2] #trim off the angle brackets
+            key = ' '.join(keySet[bindName]) #make key(s) into a string
+            bindName = bindName[2:-2] #trim off the angle brackets
             if keySetName in self.changedItems['keys']:
                 #handle any unsaved changes to this key set
                 if bindName in self.changedItems['keys'][keySetName]:
-                    key=self.changedItems['keys'][keySetName][bindName]
+                    key = self.changedItems['keys'][keySetName][bindName]
             self.listBindings.insert(END, bindName+' - '+key)
         if reselect:
             self.listBindings.see(listIndex)
@@ -719,9 +759,9 @@
 
     def DeleteCustomKeys(self):
         keySetName=self.customKeys.get()
-        if not tkMessageBox.askyesno('Delete Key Set','Are you sure you wish '+
-                                     'to delete the key set %r ?' % (keySetName),
-                                     parent=self):
+        delmsg = 'Are you sure you wish to delete the key set %r ?'
+        if not tkMessageBox.askyesno(
+                'Delete Key Set',  delmsg % keySetName, parent=self):
             return
         #remove key set from config
         idleConf.userCfg['keys'].remove_section(keySetName)
@@ -730,25 +770,25 @@
         #write changes
         idleConf.userCfg['keys'].Save()
         #reload user key set list
-        itemList=idleConf.GetSectionList('user','keys')
+        itemList = idleConf.GetSectionList('user', 'keys')
         itemList.sort()
         if not itemList:
             self.radioKeysCustom.config(state=DISABLED)
-            self.optMenuKeysCustom.SetMenu(itemList,'- no custom keys -')
+            self.optMenuKeysCustom.SetMenu(itemList, '- no custom keys -')
         else:
-            self.optMenuKeysCustom.SetMenu(itemList,itemList[0])
+            self.optMenuKeysCustom.SetMenu(itemList, itemList[0])
         #revert to default key set
-        self.keysAreBuiltin.set(idleConf.defaultCfg['main'].Get('Keys','default'))
-        self.builtinKeys.set(idleConf.defaultCfg['main'].Get('Keys','name'))
+        self.keysAreBuiltin.set(idleConf.defaultCfg['main'].Get('Keys', 'default'))
+        self.builtinKeys.set(idleConf.defaultCfg['main'].Get('Keys', 'name'))
         #user can't back out of these changes, they must be applied now
         self.Apply()
         self.SetKeysType()
 
     def DeleteCustomTheme(self):
-        themeName=self.customTheme.get()
-        if not tkMessageBox.askyesno('Delete Theme','Are you sure you wish '+
-                                     'to delete the theme %r ?' % (themeName,),
-                                     parent=self):
+        themeName = self.customTheme.get()
+        delmsg = 'Are you sure you wish to delete the theme %r ?'
+        if not tkMessageBox.askyesno(
+                'Delete Theme',  delmsg % themeName, parent=self):
             return
         #remove theme from config
         idleConf.userCfg['highlight'].remove_section(themeName)
@@ -757,153 +797,149 @@
         #write changes
         idleConf.userCfg['highlight'].Save()
         #reload user theme list
-        itemList=idleConf.GetSectionList('user','highlight')
+        itemList = idleConf.GetSectionList('user', 'highlight')
         itemList.sort()
         if not itemList:
             self.radioThemeCustom.config(state=DISABLED)
-            self.optMenuThemeCustom.SetMenu(itemList,'- no custom themes -')
+            self.optMenuThemeCustom.SetMenu(itemList, '- no custom themes -')
         else:
-            self.optMenuThemeCustom.SetMenu(itemList,itemList[0])
+            self.optMenuThemeCustom.SetMenu(itemList, itemList[0])
         #revert to default theme
-        self.themeIsBuiltin.set(idleConf.defaultCfg['main'].Get('Theme','default'))
-        self.builtinTheme.set(idleConf.defaultCfg['main'].Get('Theme','name'))
+        self.themeIsBuiltin.set(idleConf.defaultCfg['main'].Get('Theme', 'default'))
+        self.builtinTheme.set(idleConf.defaultCfg['main'].Get('Theme', 'name'))
         #user can't back out of these changes, they must be applied now
         self.Apply()
         self.SetThemeType()
 
     def GetColour(self):
-        target=self.highlightTarget.get()
-        prevColour=self.frameColourSet.cget('bg')
-        rgbTuplet, colourString = tkColorChooser.askcolor(parent=self,
-            title='Pick new colour for : '+target,initialcolor=prevColour)
-        if colourString and (colourString!=prevColour):
+        target = self.highlightTarget.get()
+        prevColour = self.frameColourSet.cget('bg')
+        rgbTuplet, colourString = tkColorChooser.askcolor(
+                parent=self, title='Pick new colour for : '+target,
+                initialcolor=prevColour)
+        if colourString and (colourString != prevColour):
             #user didn't cancel, and they chose a new colour
-            if self.themeIsBuiltin.get(): #current theme is a built-in
-                message=('Your changes will be saved as a new Custom Theme. '+
-                        'Enter a name for your new Custom Theme below.')
-                newTheme=self.GetNewThemeName(message)
-                if not newTheme: #user cancelled custom theme creation
+            if self.themeIsBuiltin.get():  #current theme is a built-in
+                message = ('Your changes will be saved as a new Custom Theme. '
+                           'Enter a name for your new Custom Theme below.')
+                newTheme = self.GetNewThemeName(message)
+                if not newTheme:  #user cancelled custom theme creation
                     return
-                else: #create new custom theme based on previously active theme
+                else:  #create new custom theme based on previously active theme
                     self.CreateNewTheme(newTheme)
                     self.colour.set(colourString)
-            else: #current theme is user defined
+            else:  #current theme is user defined
                 self.colour.set(colourString)
 
     def OnNewColourSet(self):
         newColour=self.colour.get()
-        self.frameColourSet.config(bg=newColour)#set sample
-        if self.fgHilite.get(): plane='foreground'
-        else: plane='background'
-        sampleElement=self.themeElements[self.highlightTarget.get()][0]
+        self.frameColourSet.config(bg=newColour)  #set sample
+        plane ='foreground' if self.fgHilite.get() else 'background'
+        sampleElement = self.themeElements[self.highlightTarget.get()][0]
         self.textHighlightSample.tag_config(sampleElement, **{plane:newColour})
-        theme=self.customTheme.get()
-        themeElement=sampleElement+'-'+plane
-        self.AddChangedItem('highlight',theme,themeElement,newColour)
+        theme = self.customTheme.get()
+        themeElement = sampleElement + '-' + plane
+        self.AddChangedItem('highlight', theme, themeElement, newColour)
 
-    def GetNewThemeName(self,message):
-        usedNames=(idleConf.GetSectionList('user','highlight')+
-                idleConf.GetSectionList('default','highlight'))
-        newTheme=GetCfgSectionNameDialog(self,'New Custom Theme',
-                message,usedNames).result
+    def GetNewThemeName(self, message):
+        usedNames = (idleConf.GetSectionList('user', 'highlight') +
+                idleConf.GetSectionList('default', 'highlight'))
+        newTheme = GetCfgSectionNameDialog(
+                self, 'New Custom Theme', message, usedNames).result
         return newTheme
 
     def SaveAsNewTheme(self):
-        newThemeName=self.GetNewThemeName('New Theme Name:')
+        newThemeName = self.GetNewThemeName('New Theme Name:')
         if newThemeName:
             self.CreateNewTheme(newThemeName)
 
-    def CreateNewTheme(self,newThemeName):
+    def CreateNewTheme(self, newThemeName):
         #creates new custom theme based on the previously active theme,
         #and makes the new theme active
         if self.themeIsBuiltin.get():
-            themeType='default'
-            themeName=self.builtinTheme.get()
+            themeType = 'default'
+            themeName = self.builtinTheme.get()
         else:
-            themeType='user'
-            themeName=self.customTheme.get()
-        newTheme=idleConf.GetThemeDict(themeType,themeName)
+            themeType = 'user'
+            themeName = self.customTheme.get()
+        newTheme = idleConf.GetThemeDict(themeType, themeName)
         #apply any of the old theme's unsaved changes to the new theme
         if themeName in self.changedItems['highlight']:
-            themeChanges=self.changedItems['highlight'][themeName]
+            themeChanges = self.changedItems['highlight'][themeName]
             for element in themeChanges:
-                newTheme[element]=themeChanges[element]
+                newTheme[element] = themeChanges[element]
         #save the new theme
-        self.SaveNewTheme(newThemeName,newTheme)
+        self.SaveNewTheme(newThemeName, newTheme)
         #change gui over to the new theme
-        customThemeList=idleConf.GetSectionList('user','highlight')
+        customThemeList = idleConf.GetSectionList('user', 'highlight')
         customThemeList.sort()
-        self.optMenuThemeCustom.SetMenu(customThemeList,newThemeName)
+        self.optMenuThemeCustom.SetMenu(customThemeList, newThemeName)
         self.themeIsBuiltin.set(0)
         self.SetThemeType()
 
-    def OnListFontButtonRelease(self,event):
+    def OnListFontButtonRelease(self, event):
         font = self.listFontName.get(ANCHOR)
         self.fontName.set(font.lower())
         self.SetFontSample()
 
-    def SetFontSample(self,event=None):
-        fontName=self.fontName.get()
-        if self.fontBold.get():
-            fontWeight=tkFont.BOLD
-        else:
-            fontWeight=tkFont.NORMAL
+    def SetFontSample(self, event=None):
+        fontName = self.fontName.get()
+        fontWeight = tkFont.BOLD if self.fontBold.get() else tkFont.NORMAL
         newFont = (fontName, self.fontSize.get(), fontWeight)
         self.labelFontSample.config(font=newFont)
         self.textHighlightSample.configure(font=newFont)
 
     def SetHighlightTarget(self):
-        if self.highlightTarget.get()=='Cursor': #bg not possible
+        if self.highlightTarget.get() == 'Cursor':  #bg not possible
             self.radioFg.config(state=DISABLED)
             self.radioBg.config(state=DISABLED)
             self.fgHilite.set(1)
-        else: #both fg and bg can be set
+        else:  #both fg and bg can be set
             self.radioFg.config(state=NORMAL)
             self.radioBg.config(state=NORMAL)
             self.fgHilite.set(1)
         self.SetColourSample()
 
-    def SetColourSampleBinding(self,*args):
+    def SetColourSampleBinding(self, *args):
         self.SetColourSample()
 
     def SetColourSample(self):
         #set the colour smaple area
-        tag=self.themeElements[self.highlightTarget.get()][0]
-        if self.fgHilite.get(): plane='foreground'
-        else: plane='background'
-        colour=self.textHighlightSample.tag_cget(tag,plane)
+        tag = self.themeElements[self.highlightTarget.get()][0]
+        plane = 'foreground' if self.fgHilite.get() else 'background'
+        colour = self.textHighlightSample.tag_cget(tag, plane)
         self.frameColourSet.config(bg=colour)
 
     def PaintThemeSample(self):
-        if self.themeIsBuiltin.get(): #a default theme
-            theme=self.builtinTheme.get()
-        else: #a user theme
-            theme=self.customTheme.get()
+        if self.themeIsBuiltin.get():  #a default theme
+            theme = self.builtinTheme.get()
+        else:  #a user theme
+            theme = self.customTheme.get()
         for elementTitle in self.themeElements:
-            element=self.themeElements[elementTitle][0]
-            colours=idleConf.GetHighlight(theme,element)
-            if element=='cursor': #cursor sample needs special painting
-                colours['background']=idleConf.GetHighlight(theme,
-                        'normal', fgBg='bg')
+            element = self.themeElements[elementTitle][0]
+            colours = idleConf.GetHighlight(theme, element)
+            if element == 'cursor': #cursor sample needs special painting
+                colours['background'] = idleConf.GetHighlight(
+                        theme, 'normal', fgBg='bg')
             #handle any unsaved changes to this theme
             if theme in self.changedItems['highlight']:
-                themeDict=self.changedItems['highlight'][theme]
-                if element+'-foreground' in themeDict:
-                    colours['foreground']=themeDict[element+'-foreground']
-                if element+'-background' in themeDict:
-                    colours['background']=themeDict[element+'-background']
+                themeDict = self.changedItems['highlight'][theme]
+                if element + '-foreground' in themeDict:
+                    colours['foreground'] = themeDict[element + '-foreground']
+                if element + '-background' in themeDict:
+                    colours['background'] = themeDict[element + '-background']
             self.textHighlightSample.tag_config(element, **colours)
         self.SetColourSample()
 
-    def HelpSourceSelected(self,event):
+    def HelpSourceSelected(self, event):
         self.SetHelpListButtonStates()
 
     def SetHelpListButtonStates(self):
-        if self.listHelp.size()<1: #no entries in list
+        if self.listHelp.size() < 1:  #no entries in list
             self.buttonHelpListEdit.config(state=DISABLED)
             self.buttonHelpListRemove.config(state=DISABLED)
         else: #there are some entries
-            if self.listHelp.curselection(): #there currently is a selection
+            if self.listHelp.curselection():  #there currently is a selection
                 self.buttonHelpListEdit.config(state=NORMAL)
                 self.buttonHelpListRemove.config(state=NORMAL)
             else:  #there currently is not a selection
@@ -911,28 +947,29 @@
                 self.buttonHelpListRemove.config(state=DISABLED)
 
     def HelpListItemAdd(self):
-        helpSource=GetHelpSourceDialog(self,'New Help Source').result
+        helpSource = GetHelpSourceDialog(self, 'New Help Source').result
         if helpSource:
-            self.userHelpList.append( (helpSource[0],helpSource[1]) )
-            self.listHelp.insert(END,helpSource[0])
+            self.userHelpList.append((helpSource[0], helpSource[1]))
+            self.listHelp.insert(END, helpSource[0])
             self.UpdateUserHelpChangedItems()
         self.SetHelpListButtonStates()
 
     def HelpListItemEdit(self):
-        itemIndex=self.listHelp.index(ANCHOR)
-        helpSource=self.userHelpList[itemIndex]
-        newHelpSource=GetHelpSourceDialog(self,'Edit Help Source',
-                menuItem=helpSource[0],filePath=helpSource[1]).result
-        if (not newHelpSource) or (newHelpSource==helpSource):
+        itemIndex = self.listHelp.index(ANCHOR)
+        helpSource = self.userHelpList[itemIndex]
+        newHelpSource = GetHelpSourceDialog(
+                self, 'Edit Help Source', menuItem=helpSource[0],
+                filePath=helpSource[1]).result
+        if (not newHelpSource) or (newHelpSource == helpSource):
             return #no changes
-        self.userHelpList[itemIndex]=newHelpSource
+        self.userHelpList[itemIndex] = newHelpSource
         self.listHelp.delete(itemIndex)
-        self.listHelp.insert(itemIndex,newHelpSource[0])
+        self.listHelp.insert(itemIndex, newHelpSource[0])
         self.UpdateUserHelpChangedItems()
         self.SetHelpListButtonStates()
 
     def HelpListItemRemove(self):
-        itemIndex=self.listHelp.index(ANCHOR)
+        itemIndex = self.listHelp.index(ANCHOR)
         del(self.userHelpList[itemIndex])
         self.listHelp.delete(itemIndex)
         self.UpdateUserHelpChangedItems()
@@ -941,18 +978,19 @@
     def UpdateUserHelpChangedItems(self):
         "Clear and rebuild the HelpFiles section in self.changedItems"
         self.changedItems['main']['HelpFiles'] = {}
-        for num in range(1,len(self.userHelpList)+1):
-            self.AddChangedItem('main','HelpFiles',str(num),
+        for num in range(1, len(self.userHelpList) + 1):
+            self.AddChangedItem(
+                    'main', 'HelpFiles', str(num),
                     ';'.join(self.userHelpList[num-1][:2]))
 
     def LoadFontCfg(self):
         ##base editor font selection list
-        fonts=list(tkFont.families(self))
+        fonts = list(tkFont.families(self))
         fonts.sort()
         for font in fonts:
-            self.listFontName.insert(END,font)
-        configuredFont=idleConf.GetOption('main','EditorWindow','font',
-                                          default='courier')
+            self.listFontName.insert(END, font)
+        configuredFont = idleConf.GetOption(
+                'main', 'EditorWindow', 'font', default='courier')
         lc_configuredFont = configuredFont.lower()
         self.fontName.set(lc_configuredFont)
         lc_fonts = [s.lower() for s in fonts]
@@ -962,107 +1000,107 @@
             self.listFontName.select_set(currentFontIndex)
             self.listFontName.select_anchor(currentFontIndex)
         ##font size dropdown
-        fontSize=idleConf.GetOption('main', 'EditorWindow', 'font-size',
-                                    type='int', default='10')
-        self.optMenuFontSize.SetMenu(('7','8','9','10','11','12','13','14',
-                                      '16','18','20','22'), fontSize )
+        fontSize = idleConf.GetOption(
+                'main', 'EditorWindow', 'font-size', type='int', default='10')
+        self.optMenuFontSize.SetMenu(('7', '8', '9', '10', '11', '12', '13',
+                                      '14', '16', '18', '20', '22'), fontSize )
         ##fontWeight
-        self.fontBold.set(idleConf.GetOption('main','EditorWindow',
-                                             'font-bold',default=0,type='bool'))
+        self.fontBold.set(idleConf.GetOption(
+                'main', 'EditorWindow', 'font-bold', default=0, type='bool'))
         ##font sample
         self.SetFontSample()
 
     def LoadTabCfg(self):
         ##indent sizes
-        spaceNum=idleConf.GetOption('main','Indent','num-spaces',
-                default=4,type='int')
+        spaceNum = idleConf.GetOption(
+            'main', 'Indent', 'num-spaces', default=4, type='int')
         self.spaceNum.set(spaceNum)
 
     def LoadThemeCfg(self):
         ##current theme type radiobutton
-        self.themeIsBuiltin.set(idleConf.GetOption('main','Theme','default',
-            type='bool',default=1))
+        self.themeIsBuiltin.set(idleConf.GetOption(
+                'main', 'Theme', 'default', type='bool', default=1))
         ##currently set theme
-        currentOption=idleConf.CurrentTheme()
+        currentOption = idleConf.CurrentTheme()
         ##load available theme option menus
         if self.themeIsBuiltin.get(): #default theme selected
-            itemList=idleConf.GetSectionList('default','highlight')
+            itemList = idleConf.GetSectionList('default', 'highlight')
             itemList.sort()
-            self.optMenuThemeBuiltin.SetMenu(itemList,currentOption)
-            itemList=idleConf.GetSectionList('user','highlight')
+            self.optMenuThemeBuiltin.SetMenu(itemList, currentOption)
+            itemList = idleConf.GetSectionList('user', 'highlight')
             itemList.sort()
             if not itemList:
                 self.radioThemeCustom.config(state=DISABLED)
                 self.customTheme.set('- no custom themes -')
             else:
-                self.optMenuThemeCustom.SetMenu(itemList,itemList[0])
+                self.optMenuThemeCustom.SetMenu(itemList, itemList[0])
         else: #user theme selected
-            itemList=idleConf.GetSectionList('user','highlight')
+            itemList = idleConf.GetSectionList('user', 'highlight')
             itemList.sort()
-            self.optMenuThemeCustom.SetMenu(itemList,currentOption)
-            itemList=idleConf.GetSectionList('default','highlight')
+            self.optMenuThemeCustom.SetMenu(itemList, currentOption)
+            itemList = idleConf.GetSectionList('default', 'highlight')
             itemList.sort()
-            self.optMenuThemeBuiltin.SetMenu(itemList,itemList[0])
+            self.optMenuThemeBuiltin.SetMenu(itemList, itemList[0])
         self.SetThemeType()
         ##load theme element option menu
-        themeNames=self.themeElements.keys()
+        themeNames = self.themeElements.keys()
         themeNames.sort(key=lambda x: self.themeElements[x][1])
-        self.optMenuHighlightTarget.SetMenu(themeNames,themeNames[0])
+        self.optMenuHighlightTarget.SetMenu(themeNames, themeNames[0])
         self.PaintThemeSample()
         self.SetHighlightTarget()
 
     def LoadKeyCfg(self):
         ##current keys type radiobutton
-        self.keysAreBuiltin.set(idleConf.GetOption('main','Keys','default',
-            type='bool',default=1))
+        self.keysAreBuiltin.set(idleConf.GetOption(
+                'main', 'Keys', 'default', type='bool', default=1))
         ##currently set keys
-        currentOption=idleConf.CurrentKeys()
+        currentOption = idleConf.CurrentKeys()
         ##load available keyset option menus
         if self.keysAreBuiltin.get(): #default theme selected
-            itemList=idleConf.GetSectionList('default','keys')
+            itemList = idleConf.GetSectionList('default', 'keys')
             itemList.sort()
-            self.optMenuKeysBuiltin.SetMenu(itemList,currentOption)
-            itemList=idleConf.GetSectionList('user','keys')
+            self.optMenuKeysBuiltin.SetMenu(itemList, currentOption)
+            itemList = idleConf.GetSectionList('user', 'keys')
             itemList.sort()
             if not itemList:
                 self.radioKeysCustom.config(state=DISABLED)
                 self.customKeys.set('- no custom keys -')
             else:
-                self.optMenuKeysCustom.SetMenu(itemList,itemList[0])
+                self.optMenuKeysCustom.SetMenu(itemList, itemList[0])
         else: #user key set selected
-            itemList=idleConf.GetSectionList('user','keys')
+            itemList = idleConf.GetSectionList('user', 'keys')
             itemList.sort()
-            self.optMenuKeysCustom.SetMenu(itemList,currentOption)
-            itemList=idleConf.GetSectionList('default','keys')
+            self.optMenuKeysCustom.SetMenu(itemList, currentOption)
+            itemList = idleConf.GetSectionList('default', 'keys')
             itemList.sort()
-            self.optMenuKeysBuiltin.SetMenu(itemList,itemList[0])
+            self.optMenuKeysBuiltin.SetMenu(itemList, itemList[0])
         self.SetKeysType()
         ##load keyset element list
-        keySetName=idleConf.CurrentKeys()
+        keySetName = idleConf.CurrentKeys()
         self.LoadKeysList(keySetName)
 
     def LoadGeneralCfg(self):
         #startup state
-        self.startupEdit.set(idleConf.GetOption('main','General',
-                'editor-on-startup',default=1,type='bool'))
+        self.startupEdit.set(idleConf.GetOption(
+                'main', 'General', 'editor-on-startup', default=1, type='bool'))
         #autosave state
-        self.autoSave.set(idleConf.GetOption('main', 'General', 'autosave',
-                                             default=0, type='bool'))
+        self.autoSave.set(idleConf.GetOption(
+                'main', 'General', 'autosave', default=0, type='bool'))
         #initial window size
-        self.winWidth.set(idleConf.GetOption('main','EditorWindow','width',
-                                             type='int'))
-        self.winHeight.set(idleConf.GetOption('main','EditorWindow','height',
-                                              type='int'))
+        self.winWidth.set(idleConf.GetOption(
+                'main', 'EditorWindow', 'width', type='int'))
+        self.winHeight.set(idleConf.GetOption(
+                'main', 'EditorWindow', 'height', type='int'))
         #initial paragraph reformat size
-        self.paraWidth.set(idleConf.GetOption('main','FormatParagraph','paragraph',
-                                              type='int'))
+        self.paraWidth.set(idleConf.GetOption(
+                'main', 'FormatParagraph', 'paragraph', type='int'))
         # default source encoding
-        self.encoding.set(idleConf.GetOption('main', 'EditorWindow',
-                                             'encoding', default='none'))
+        self.encoding.set(idleConf.GetOption(
+                'main', 'EditorWindow', 'encoding', default='none'))
         # additional help sources
         self.userHelpList = idleConf.GetAllExtraHelpSourcesList()
         for helpItem in self.userHelpList:
-            self.listHelp.insert(END,helpItem[0])
+            self.listHelp.insert(END, helpItem[0])
         self.SetHelpListButtonStates()
 
     def LoadConfigs(self):
@@ -1080,7 +1118,7 @@
         ### general page
         self.LoadGeneralCfg()
 
-    def SaveNewKeySet(self,keySetName,keySet):
+    def SaveNewKeySet(self, keySetName, keySet):
         """
         save a newly created core key set.
         keySetName - string, the name of the new key set
@@ -1089,10 +1127,10 @@
         if not idleConf.userCfg['keys'].has_section(keySetName):
             idleConf.userCfg['keys'].add_section(keySetName)
         for event in keySet:
-            value=keySet[event]
-            idleConf.userCfg['keys'].SetOption(keySetName,event,value)
+            value = keySet[event]
+            idleConf.userCfg['keys'].SetOption(keySetName, event, value)
 
-    def SaveNewTheme(self,themeName,theme):
+    def SaveNewTheme(self, themeName, theme):
         """
         save a newly created theme.
         themeName - string, the name of the new theme
@@ -1101,16 +1139,16 @@
         if not idleConf.userCfg['highlight'].has_section(themeName):
             idleConf.userCfg['highlight'].add_section(themeName)
         for element in theme:
-            value=theme[element]
-            idleConf.userCfg['highlight'].SetOption(themeName,element,value)
+            value = theme[element]
+            idleConf.userCfg['highlight'].SetOption(themeName, element, value)
 
-    def SetUserValue(self,configType,section,item,value):
-        if idleConf.defaultCfg[configType].has_option(section,item):
-            if idleConf.defaultCfg[configType].Get(section,item)==value:
+    def SetUserValue(self, configType, section, item, value):
+        if idleConf.defaultCfg[configType].has_option(section, item):
+            if idleConf.defaultCfg[configType].Get(section, item) == value:
                 #the setting equals a default setting, remove it from user cfg
-                return idleConf.userCfg[configType].RemoveOption(section,item)
+                return idleConf.userCfg[configType].RemoveOption(section, item)
         #if we got here set the option
-        return idleConf.userCfg[configType].SetOption(section,item,value)
+        return idleConf.userCfg[configType].SetOption(section, item, value)
 
     def SaveAllChangedConfigs(self):
         "Save configuration changes to the user config file."
@@ -1124,7 +1162,7 @@
                     cfgTypeHasChanges = True
                 for item in self.changedItems[configType][section]:
                     value = self.changedItems[configType][section][item]
-                    if self.SetUserValue(configType,section,item,value):
+                    if self.SetUserValue(configType, section, item, value):
                         cfgTypeHasChanges = True
             if cfgTypeHasChanges:
                 idleConf.userCfg[configType].Save()
@@ -1136,7 +1174,7 @@
     def DeactivateCurrentConfig(self):
         #Before a config is saved, some cleanup of current
         #config must be done - remove the previous keybindings
-        winInstances=self.parent.instance_dict
+        winInstances = self.parent.instance_dict
         for instance in winInstances:
             instance.RemoveKeybindings()