>>>>> Edward Elliott <[EMAIL PROTECTED]> (EE) wrote: >EE> Piet van Oostrum wrote: >>>>>>>> [EMAIL PROTECTED] (T) wrote: >>> >T> As you can see, the "constant" A can be modified this easily. But if >T> there were an intuitive mechanism to declare a symbol to be immutable, >T> then there won't be this problem. >>> >>> Mutability is not a property of symbols but of values. So it doesn't make >>> sense to declare an identifier to be immutable. And mutability is tied to >>> the object's type, not to individual instances.
>EE> I think he meant immutable binding, not immutable symbol. So >EE> rebinding/overshadowing a "constant" A would raise an error, but >EE> mutating the underlying object A refers to would not (unless it too >EE> were immutable). The way I understood it was that he meant both. -- Piet van Oostrum <[EMAIL PROTECTED]> URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4] Private email: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
