In article <16272.6895.233187.510629@montanaro.dyndns.org>, Skip Montanaro <skip@pobox.com> wrote:
I'm not in a mood to try and explain anything in more precise terms this morning (for other reasons, it's been a piss poor day so far) and must trust your ability to infer my meaning. I have no idea at this point how to interpret
foo[x*x for x in bar]
That looks like a syntax error to me. You have a probably identifier followed by a list comprehension.
foo[ anything ] does not look like an identifier followed by a list, it looks like an indexing operation. So I would interpret foo[x*x for x in bar] to equal foo.__getitem__(i) where i is an iterator of x*x for x in bar. In particular if iter.__getitem__ works appropriately, then iter[x*x for x in bar] could be a generator comprehension and iter[1:n] could be an xrange. Similarly sum and max could be given appropriate __getitem__ methods. -- David Eppstein http://www.ics.uci.edu/~eppstein/ Univ. of California, Irvine, School of Information & Computer Science