SF Patch 643443.  Added dict.fromkeys(iterable, value=None), a class
method for constructing new dictionaries from sequences of keys.
diff --git a/Misc/NEWS b/Misc/NEWS
index 89303ba..066f8a5 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -270,6 +270,11 @@
   an optional argument that specifies the characters to strip.  For
   example, "Foo!!!?!?!?".rstrip("?!") -> "Foo".
 
+- Dictionaries have a new class method, fromkeys(iterable, value=None).
+  It constructs a new dictionary with keys taken from the iterable and
+  all values set to a single value.  It is used for building membership
+  tests and for removing duplicates from sequences.
+
 - Added a new dict method pop(key).  This removes and returns the
   value corresponding to key.  [SF patch #539949]