Index: Lib/tkinter/scrolledtext.py
===================================================================
--- Lib/tkinter/scrolledtext.py	(revision 63801)
+++ Lib/tkinter/scrolledtext.py	(working copy)
@@ -19,11 +19,10 @@
             cnf = {}
         if kw:
             cnf = _cnfmerge((cnf, kw))
-        fcnf = {}
-        for k in cnf.keys():
-            if isinstance(k, type) or k == 'name':
-                fcnf[k] = cnf[k]
-                del cnf[k]
+        fcnf = {k:v for k,v in cnf.items() if isinstance(k,type) or k=='name'}
+        for k in fcnf.keys():
+            del cnf[k]
+
         self.frame = Frame(master, **fcnf)
         self.vbar = Scrollbar(self.frame, name='vbar')
         self.vbar.pack(side=RIGHT, fill=Y)
Index: Lib/tkinter/__init__.py
===================================================================
--- Lib/tkinter/__init__.py	(revision 63801)
+++ Lib/tkinter/__init__.py	(working copy)
@@ -1918,11 +1918,9 @@
             cnf = _cnfmerge((cnf, kw))
         self.widgetName = widgetName
         BaseWidget._setup(self, master, cnf)
-        classes = []
-        for k in cnf.keys():
-            if isinstance(k, type):
-                classes.append((k, cnf[k]))
-                del cnf[k]
+        classes = [(k, v) for k, v in cnf.items() if isinstance(k, type)]
+        for c in classes:
+            del cnf[c[0]]
         self.tk.call(
             (widgetName, self._w) + extra + self._options(cnf))
         for k, v in classes: