Carl Banks wrote: > On Dec 27, 12:38 pm, [EMAIL PROTECTED] wrote: >> After some tought I must agree that this is a wart more than >> a bug and that it will probably be best not to mess with it. >> However, what do you guys think about the print wart in Py3k >> described >> athttp://filoxus.blogspot.com/2007/12/python-3000-how-mutable-is-immuta... >> (im not trying to advertise my blog, I just don't feel like >> typing the whole problem all over again)? > > > 1. Tuples are immutable. None of the tuples in your example were > modified. > > The behavior you want (which is not immutability of tuples, which > Python already has, but *recursive* immutability of all objects > contained within the tuple) is not an unreasonable thing to ask for, > but the design of Python and common usage of tuples makes it all but > impossible at this point. > > There is no general way to determine whether an object is mutable or > not. (Python would have to add this capability, an extremely > substantial change, to grant your wish. It won't happen.)
like I said, I don't think that this behavior should be changed... therefore, no wish-granting is needed, thank you :) > > Tuples are used internally to represent the arguments of a function, > which are often mutable. > > Tuples are sometimes used to return multiple values from a function, > which could include mutable values. > > Tuples are used to specify multiple arguments to a format string, some > of which could be mutable, though I guess this is going away in Python > 3. > > > 2. The issue with print in your example is a bug, not a wart. It'll > be fixed. > > (This is just a guess, but I think it might have something to do with > the flux of the new bytes type. The behavior manifested itself when > trying to print a self-referencing structure probably only because > that section of code was lagging behind.) > > > 3. You're still top posting, which goes against this group's > conventions and annoys quite a few people. When you reply to a > message, please move your cursor to below the quoted message before > you begin typing. Thank you sorry for top posting... -- http://mail.python.org/mailman/listinfo/python-list
