Issue #23184: idle tests, remove unused names and imports.

Lib/idlelib/idle_test/test_autocomplete.py

 import unittest
 from test.support import requires
-from tkinter import Tk, Text, TclError
+from tkinter import Tk, Text
 
 import idlelib.AutoComplete as ac
 import idlelib.AutoCompleteWindow as acw
@@ -95,8 +95,8 @@ class AutoCompleteTest(unittest.TestCase):
         del ev.mc_state
 
         # If autocomplete window is open, complete() method is called
-        testwin = self.autocomplete._make_autocomplete_window()
         self.text.insert('1.0', 're.')
+        # This must call autocomplete._make_autocomplete_window()
         Equal(self.autocomplete.autocomplete_event(ev), 'break')
 
         # If autocomplete window is not active or does not exist,

Lib/idlelib/idle_test/test_formatparagraph.py

@@ -2,7 +2,7 @@
 import unittest
 from idlelib import FormatParagraph as fp
 from idlelib.EditorWindow import EditorWindow
-from tkinter import Tk, Text, TclError
+from tkinter import Tk, Text
 from test.support import requires
 
 

Lib/idlelib/idle_test/test_searchdialogbase.py

@@ -6,13 +6,13 @@ testing skipping of suite when self.needwrapbutton is false.
 '''
 import unittest
 from test.support import requires
-from tkinter import Tk, Toplevel, Frame, Label, BooleanVar, StringVar
+from tkinter import Tk, Toplevel, Frame ##, BooleanVar, StringVar
 from idlelib import SearchEngine as se
 from idlelib import SearchDialogBase as sdb
 from idlelib.idle_test.mock_idle import Func
-from idlelib.idle_test.mock_tk import Var, Mbox
+## from idlelib.idle_test.mock_tk import Var
 
-# The following could help make some tests gui-free.
+# The ## imports above & following could help make some tests gui-free.
 # However, they currently make radiobutton tests fail.
 ##def setUpModule():
 ##    # Replace tk objects used to initialize se.SearchEngine.

Lib/idlelib/idle_test/test_searchengine.py

@@ -7,7 +7,7 @@
 
 import re
 import unittest
-from test.support import requires
+# from test.support import requires
 from tkinter import  BooleanVar, StringVar, TclError  # ,Tk, Text
 import tkinter.messagebox as tkMessageBox
 from idlelib import SearchEngine as se

Lib/idlelib/idle_test/test_text.py

@@ -3,7 +3,6 @@ import unittest
 from test.support import requires
 
 from _tkinter import TclError
-import tkinter as tk
 
 class TextTest(object):