That's rather vague, isn't it? "Usually contains" isn't nearly as prescriptive as "should be used for".
A co-worker with whom I discussed the matter these days also argued that a language shouldn't prescribe as one uses a data structure, although I do think conventions in semantics helps maintainability. Leandro 2014-04-18 16:59 GMT-03:00 Ezio Melotti <ezio.melo...@gmail.com>: > Hi, > > On Thu, Apr 17, 2014 at 10:23 PM, Guido van Rossum <gu...@python.org> > wrote: > > It's definitely something that should be put in some documentation, > > see http://bugs.python.org/issue14840 and > https://docs.python.org/3/tutorial/datastructures.html#tuples-and-sequences > : > """ > Though tuples may seem similar to lists, they are often used in > different situations and for different purposes. Tuples are immutable, > and usually contain an heterogeneous sequence of elements that are > accessed via unpacking (see later in this section) or indexing (or > even by attribute in the case of namedtuples). Lists are mutable, and > their elements are usually homogeneous and are accessed by iterating > over the list. > """ > > Best Regards, > Ezio Melotti > > > probably > > at the point when people have learned enough to be designing their own > > programs where this issue comes up -- before they're wizards but well > after > > they have learned the semantic differences between lists and tuples. > > > > > > On Thu, Apr 17, 2014 at 11:49 AM, Brett Cannon <bcan...@gmail.com> > wrote: > >> > >> > >> > >> On Thu Apr 17 2014 at 2:43:35 PM, Leandro Pereira de Lima e Silva > >> <leandro...@cpti.cetuc.puc-rio.br> wrote: > >>> > >>> Hello there! > >>> > >>> I've stumbled upon this discussion on python-dev about what the choice > >>> between using a list or a tuple is all about in 2003: > >>> 1. https://mail.python.org/pipermail/python-dev/2003-March/033962.html > >>> 2. https://mail.python.org/pipermail/python-dev/2003-March/034029.html > >>> > >>> There's a vague comment about it on python documentation but afaik > there > >>> the discussion hasn't made into any PEPs. Is there an understanding > about > >>> it? > >> > >> > >> Think of tuples like a struct in C, lists like an array. That's just out > >> of Guido's head so I don't think we have ever bothered to write it down > >> somewhere as an important distinction of the initial design that should > be > >> emphasized. > >> > >> _______________________________________________ > >> Python-Dev mailing list > >> Python-Dev@python.org > >> https://mail.python.org/mailman/listinfo/python-dev > >> Unsubscribe: > >> https://mail.python.org/mailman/options/python-dev/guido%40python.org > >> > > > > > > > > -- > > --Guido van Rossum (python.org/~guido) > > > > _______________________________________________ > > Python-Dev mailing list > > Python-Dev@python.org > > https://mail.python.org/mailman/listinfo/python-dev > > Unsubscribe: > > > https://mail.python.org/mailman/options/python-dev/ezio.melotti%40gmail.com > > > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > https://mail.python.org/mailman/options/python-dev/leandropls%40cpti.cetuc.puc-rio.br >
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