SF patch #520382: Expand shelve.py to have a full dictionary interface
and add a mixin to UserDict.py to make it easier to implement a full
dictionary interface.
diff --git a/Misc/NEWS b/Misc/NEWS
index 34f70b7..7a6b780 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -381,6 +381,15 @@
Library
-------
+- UserDict.py now defines a DictMixin class which defines all dictionary
+ methods for classes that already have a minimum mapping interface.
+ This greatly simplifies writing classes that need to be substitutable
+ for dictionaries (such as the shelve module).
+
+- shelve.py now subclasses from UserDict.DictMixin. Now shelve supports
+ all dictionary methods. This eases the transition to persistent
+ storage for scripts originally written with dictionaries in mind.
+
- A new package, logging, implements the logging API defined by PEP
282. The code is written by Vinay Sajip.