Iteration index

[Aahz Maruch]

In article <3B169FEC.7AACB50E at yahoo.com>,
Paul Winkler  <slinkp23 at yahoo.com> wrote:
>
>I guess you could do it without the variable like this: 
>
>!! WARNING -- this only works if you use a list instead of a tuple
>AND you know that the list contains no duplicate items!!
>
>s = ['a', 'b', 'ala', 'a']
>for el in s:
>    print s.index(el), el

It's also extremely inefficient for large lists, because that's an
O(N^2) algorithm -- it has to scan the list to get the index.
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