[2.7] bpo-30855: Trying to fix test_use on Windows. (#2586)

* bpo-30855: Trying to fix test_use on Windows.

Avoid possible weird behavior of WideInt convertion.
"winfo id" always returns string hexadecimal representation.

(cherry picked from commit b9d67249)

* bpo-30855: Trying to fix test_use on Windows.

(cherry picked from commit 29a2f7c6)
(subTest() removed since it was introduced in Python 3)

Lib/lib-tk/Tkinter.py

@@ -844,8 +844,7 @@ class Misc:
             self.tk.call('winfo', 'height', self._w))
     def winfo_id(self):
         """Return identifier ID for this widget."""
-        return self.tk.getint(
-            self.tk.call('winfo', 'id', self._w))
+        return int(self.tk.call('winfo', 'id', self._w), 0)
     def winfo_interps(self, displayof=0):
         """Return the name of all Tcl interpreters for this display."""
         args = ('winfo', 'interps') + self._displayof(displayof)

Lib/lib-tk/test/test_tkinter/test_widgets.py

@@ -88,9 +88,9 @@ class ToplevelTest(AbstractToplevelTest, unittest.TestCase):
         widget = self.create()
         self.assertEqual(widget['use'], '')
         parent = self.create(container=True)
-        wid = parent.winfo_id()
+        wid = hex(parent.winfo_id())
         widget2 = self.create(use=wid)
-        self.assertEqual(int(widget2['use']), wid)
+        self.assertEqual(widget2['use'], wid)
 
 
 @add_standard_options(StandardOptionsTests)