En Thu, 07 Feb 2008 11:31:44 -0200, Diez B. Roggisch <[EMAIL PROTECTED]> escribió:
>> I see list has index member, but is there an index function that applies >> to any sequence type? >> >> If not, shouldn't there be? > > Looks like an oversight to me as well, yes. The only "difficult" > implementation would be the one for xrange, because you can't search but > must compute the result - but that should be trivial. xrange is iterable, but not a sequence. Tuples are worse: they implement __contains__ but not index. So you can say: py> 2 in (1,2,4,8) True but not: py> (1,2,4,8).index(2) Given that to implement __contains__ it has to scan the values the same way as index would do, it's like a tuple saying: "I know where that item is, and you know that I know that, but I won't tell you!" - rather frustrating. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list