- 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/pyclbr.py b/Lib/pyclbr.py
index a4ec369..fdbfbd4 100644
--- a/Lib/pyclbr.py
+++ b/Lib/pyclbr.py
@@ -329,7 +329,7 @@
     for obj in objs:
         if isinstance(obj, Class):
             print("class", obj.name, obj.super, obj.lineno)
-            methods = sorted(obj.methods.iteritems(), key=itemgetter(1))
+            methods = sorted(obj.methods.items(), key=itemgetter(1))
             for name, lineno in methods:
                 if name != "__path__":
                     print("  def", name, lineno)