- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
  and .keys(), .items(), .values() return dict views.

The dict views aren't fully functional yet; in particular, they can't
be compared to sets yet.  but they are useful as "iterator wells".

There are still 27 failing unit tests; I expect that many of these
have fairly trivial fixes, but there are so many, I could use help.
diff --git a/Lib/symbol.py b/Lib/symbol.py
index d2cee12..86aa2d0 100755
--- a/Lib/symbol.py
+++ b/Lib/symbol.py
@@ -100,7 +100,7 @@
 #--end constants--
 
 sym_name = {}
-for _name, _value in globals().items():
+for _name, _value in list(globals().items()):
     if type(_value) is type(0):
         sym_name[_value] = _name