Steven Bethard wrote: > On 5/5/07, M.-A. Lemburg <[EMAIL PROTECTED]> wrote: >> On 2007-05-04 19:51, Guido van Rossum wrote: >>> [-python-dev] >>> >>> On 5/4/07, Fred L. Drake, Jr. <[EMAIL PROTECTED]> wrote: >>>> On Friday 04 May 2007, M.-A. Lemburg wrote: >>>> > I also suggest making all bytes literals immutable to avoid running >>>> > into any issues like the above. >>>> >>>> +1 from me. >>> Rather than adding immutability to bytes objects (which has big >>> implementation and type checking implications), consider using >>> buffer(b"123") as an immutable bytes literal. You can freely >>> concatenate and compare buffer objects with bytes objects. >> I like Georg's idea of having an immutable bytes subclass. >> b"abc" could then be a shortcut constructor for this subclass. >> >> In general, I don't think it's a good idea to have literals >> turn into mutable objects, since literals are normally perceived >> as being constant. > > Does that mean you want list literals to be immutable too? > > lst = ['a', 'b', 'c'] > lst.append('d') # raises an error? > > STeVe
I think the point is rather that changes to the list linked by lst after the initial assignment shouldn't result in the assignemtn of a different value to lst if the statement is executed again (as part of a function body or in a loop, for example). regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden ------------------ Asciimercial --------------------- Get on the web: Blog, lens and tag your way to fame!! holdenweb.blogspot.com squidoo.com/pythonology tagged items: del.icio.us/steve.holden/python All these services currently offer free registration! -------------- Thank You for Reading ---------------- _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com