On 2005-12-01, Fredrik Lundh <[EMAIL PROTECTED]> wrote: > Mike Meyer wrote: > >> So why the $*@& (please excuse my Perl) does "for x in 1, 2, 3" work? > > because the syntax says so: > > http://docs.python.org/ref/for.html > >> Seriously. Why doesn't this have to be phrased as "for x in list((1, >> 2, 3))", just like you have to write list((1, 2, 3)).count(1), etc.? > > because anything that supports [] can be iterated over.
This just begs the question. If tuples are supposed to be such heterogenous sequences, one could indeed question why they support []. And even if good arguments are given why tuples shouls support [], the fact that the intention of tuples and list are so different casts doubts on the argument that supporting [] is enough reason to support iteration. One could equally also argue that since iteration is at the heart of methods like index, find and count, that supporting iteration is sufficient reason to support these methods. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
