diff --git a/Lib/idlelib/IOBinding.py b/Lib/idlelib/IOBinding.py
index e7d747c..db6773f 100644
--- a/Lib/idlelib/IOBinding.py
+++ b/Lib/idlelib/IOBinding.py
@@ -6,7 +6,6 @@
 #     which will only understand the local convention.
 
 import os
-import types
 import pipes
 import sys
 import codecs
@@ -391,7 +390,7 @@
             return False
 
     def encode(self, chars):
-        if isinstance(chars, types.StringType):
+        if isinstance(chars, str):
             # This is either plain ASCII, or Tk was returning mixed-encoding
             # text to us. Don't try to guess further.
             return chars
@@ -568,7 +567,7 @@
         "Update recent file list on all editor windows"
         self.editwin.update_recent_files_list(filename)
 
-def _io_binding(parent):
+def _io_binding(parent):  # htest #
     root = Tk()
     root.title("Test IOBinding")
     width, height, x, y = list(map(int, re.split('[x+]', parent.geometry())))
@@ -591,7 +590,7 @@
     text.pack()
     text.focus_set()
     editwin = MyEditWin(text)
-    io = IOBinding(editwin)
+    IOBinding(editwin)
 
 if __name__ == "__main__":
     from idlelib.idle_test.htest import run
diff --git a/Lib/idlelib/RemoteDebugger.py b/Lib/idlelib/RemoteDebugger.py
index 647285f..88efc7c 100644
--- a/Lib/idlelib/RemoteDebugger.py
+++ b/Lib/idlelib/RemoteDebugger.py
@@ -21,7 +21,6 @@
 """
 
 import types
-from idlelib import rpc
 from idlelib import Debugger
 
 debugging = 0
diff --git a/Lib/idlelib/SearchDialog.py b/Lib/idlelib/SearchDialog.py
index 2aadb84..043168a 100644
--- a/Lib/idlelib/SearchDialog.py
+++ b/Lib/idlelib/SearchDialog.py
@@ -23,7 +23,7 @@
 class SearchDialog(SearchDialogBase):
 
     def create_widgets(self):
-        f = SearchDialogBase.create_widgets(self)
+        SearchDialogBase.create_widgets(self)
         self.make_button("Find Next", self.default_command, 1)
 
     def default_command(self, event=None):
diff --git a/Lib/idlelib/TreeWidget.py b/Lib/idlelib/TreeWidget.py
index 1e56e86..88083f0 100644
--- a/Lib/idlelib/TreeWidget.py
+++ b/Lib/idlelib/TreeWidget.py
@@ -246,7 +246,7 @@
         else:
             self.edit_finish()
         try:
-            label = self.label
+            self.label
         except AttributeError:
             # padding carefully selected (on Windows) to match Entry widget:
             self.label = Label(self.canvas, text=text, bd=0, padx=2, pady=2)
diff --git a/Lib/idlelib/configDialog.py b/Lib/idlelib/configDialog.py
index c416151..41b76e8 100644
--- a/Lib/idlelib/configDialog.py
+++ b/Lib/idlelib/configDialog.py
@@ -14,7 +14,6 @@
 
 from idlelib.configHandler import idleConf
 from idlelib.dynOptionMenuWidget import DynOptionMenu
-from idlelib.tabbedpages import TabbedPageSet
 from idlelib.keybindingDialog import GetKeysDialog
 from idlelib.configSectionNameDialog import GetCfgSectionNameDialog
 from idlelib.configHelpSourceEdit import GetHelpSourceDialog