Get rid of dict.has_key(). Boy this has a lot of repercussions!
Not all code has been fixed yet; this is just a checkpoint...
The C API still has PyDict_HasKey() and _HasKeyString(); not sure
if I want to change those just yet.
diff --git a/Lib/test/test_scope.py b/Lib/test/test_scope.py
index 239745c..98b7ef3 100644
--- a/Lib/test/test_scope.py
+++ b/Lib/test/test_scope.py
@@ -472,7 +472,7 @@
return g
d = f(2)(4)
-verify(d.has_key('h'))
+verify('h' in d)
del d['h']
vereq(d, {'x': 2, 'y': 7, 'w': 6})