Andrew McNabb wrote: > On Fri, Jun 22, 2007 at 01:32:42PM -0600, Neil Toronto wrote: > >>> (imap is faster in this case because the built-in name 'abs' is looked >>> up only once -- in the genexp, it's looked up each time, sigh -- >>> possibly the biggest "we should REALLY tweak the language to let this >>> be optimized sensibly" gotcha in Python, IMHO). >>> >> What is it about the language as it stands that requires abs() to be >> looked up each iteration? >> > > Calling abs() could change locals()['abs'], in which case a different > function would be called the next time through. You lookup 'abs' each > time just in case it's changed. >
I can't think of a reason to allow that outside of something like an obfuscated Python code contest. I'm sure there exists someone who thinks differently... Neil _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
