- 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.

Lib/shelve.py

@@ -144,7 +144,7 @@ class Shelf(UserDict.DictMixin):
     def sync(self):
         if self.writeback and self.cache:
             self.writeback = False
-            for key, entry in self.cache.iteritems():
+            for key, entry in self.cache.items():
                 self[key] = entry
             self.writeback = True
             self.cache = {}