replace has_key with 'in' operator
diff --git a/Lib/lib-tk/tkSimpleDialog.py b/Lib/lib-tk/tkSimpleDialog.py
index 8c583db..24388a5 100644
--- a/Lib/lib-tk/tkSimpleDialog.py
+++ b/Lib/lib-tk/tkSimpleDialog.py
@@ -283,7 +283,7 @@
 
 class _QueryString(_QueryDialog):
     def __init__(self, *args, **kw):
-        if kw.has_key("show"):
+        if "show" in kw:
             self.__show = kw["show"]
             del kw["show"]
         else: