Having a general frozen() system makes a lot of sense. People use tuples for two different things: as a lightweight record type (e.g., (x, y) coordinate pairs), and as an immutable list. The latter is not officially sanctioned but is widely believed to be the purpose for tuples. And the value of an immutable list is obvious: you can use it as a constant or pass it to a function and know it won't be abused. So why not an immutable dictionary too? There are many times I would have preferred this if it were available. frozen() is appealing because it provides a general solution for all container types.
I'm not sure tuple should be eliminated, however. It still has value to show that these things are a group. And it's very lightweight to construct. -- Mike Orr <[EMAIL PROTECTED]> -- http://mail.python.org/mailman/listinfo/python-list
