[Python-Dev] Add a frozendict builtin type

[Victor Stinner]

>> I challenge anyone to try to break pysandbox!
>
> Can you explain precisely how a frozendict will help pysandbox? Then
> I'll be able to beat this challenge :-)

See this email:
http://mail.python.org/pipermail/python-dev/2012-February/117011.html

The issue #14162 has also two patches: one to make it possible to use
frozendict for __builtins__, and another one to create read-only types
(which is more a proof-of-concept).
http://bugs.python.org/issue14162

Victor