On 2/17/06, Guido van Rossum <[EMAIL PROTECTED]> wrote: > On 2/17/06, Adam Olsen <[EMAIL PROTECTED]> wrote: > > It's also makes it harder to read code. You may expect d[key] to > > raise an exception, but it won't because of a single line up several > > pages (or in another file entierly!) > > Such are the joys of writing polymorphic code. I don't really see how > you can avoid this kind of confusion -- I could have given you some > other mapping object that does weird stuff.
You could pass a float in as well. But if the function is documented as taking a dict, and the programmer expects a dict.. that now has to be changed to "dict without a default". Or they have to code defensively since d[key] may or may not raise KeyError, so they must avoid depending on it either way. -- Adam Olsen, aka Rhamphoryncus _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
