On Oct 16, 12:40 pm, Tim Chase <python.l...@tim.thechases.com> wrote: > Then I'm fine with sum() being smart enough to recognize this > horrid case and do the "right" thing by returning ''.join() > instead.
You don't want Python to get into this business. Trust me. Just don't go there. If you want sum to call ''.join transparently, then "".join would have to produce identical results to what sum() would have produced in all cases. That does not happen. If an object within the list defines both __str__ and __add__ methods, then "".join will call __str__, whereas sum would call __add__, leading to potentially different results. Therefore, transparently substituting a call to "".join is not an option. It'd be better to just remove the special case. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
