update windows build to Python 3.7

Lib/idlelib/zzdummy.py

@@ -0,0 +1,42 @@
+"Example extension, also used for testing."
+
+from idlelib.config import idleConf
+
+ztext = idleConf.GetOption('extensions', 'ZzDummy', 'z-text')
+
+
+class ZzDummy:
+
+##    menudefs = [
+##        ('format', [
+##            ('Z in', '<<z-in>>'),
+##            ('Z out', '<<z-out>>'),
+##        ] )
+##    ]
+
+    def __init__(self, editwin):
+        self.text = editwin.text
+        z_in = False
+
+    @classmethod
+    def reload(cls):
+        cls.ztext = idleConf.GetOption('extensions', 'ZzDummy', 'z-text')
+
+    def z_in_event(self, event):
+        """
+        """
+        text = self.text
+        text.undo_block_start()
+        for line in range(1, text.index('end')):
+            text.insert('%d.0', ztest)
+        text.undo_block_stop()
+        return "break"
+
+    def z_out_event(self, event): pass
+
+ZzDummy.reload()
+
+##if __name__ == "__main__":
+##    import unittest
+##    unittest.main('idlelib.idle_test.test_zzdummy',
+##            verbosity=2, exit=False)