"Asun Friere" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] | On Feb 19, 9:44 am, Steven D'Aprano <[EMAIL PROTECTED] | cybersource.com.au> wrote: | | > Except for documented singletons such as modules and None, which objects | > have the same identity is platform dependent, version dependent, and even | > dependent on the execution history of your code. | | The advice not to identity test strings and numbers (since they are | interred in the main implementation),
They may or may not be. But for almost all purposes, that is irrelevant. | or tuples, since they potentially could be, seems sound enough. Ditto for tuples, unless possibly when they have mutable members. | But given the nature of | immutables, is the identity of these even potentially implementation | dependant (ie. they couldn't be interred could they)? The word is 'interned', not 'interred' (buried). | One might | conceivably want to know that a list into which one is about to stuff | something is the same (or perhaps not the same) list as that pointed | to by another name, which operation, hopefully, remains possible | across the range of potential implementations. Lists are mutable, and identity is often important. Id(list) can be used to debug or solve puzzling behavior. tjr -- http://mail.python.org/mailman/listinfo/python-list
