- 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/xml/etree/ElementTree.py

@@ -645,7 +645,7 @@ class ElementTree:
         elif tag is ProcessingInstruction:
             file.write("<?%s?>" % _escape_cdata(node.text, encoding))
         else:
-            items = node.items()
+            items = list(node.items())
             xmlns_items = [] # new namespaces in this scope
             try:
                 if isinstance(tag, QName) or tag[:1] == "{":