[EMAIL PROTECTED] wrote: >> How could it not be an exception, in the plain English sense of the >> word? Most certainly you're asking for the index because you want to do >> something with the index. If the item is not found, you have no index, >> so that's a special case that must be handled separately. There is no >> logical difference between handling that special case in an except >> clause versus handling it with an if-branch. > > In my case of have done os.listdir() on two directories. I want to see > what files are in directory A that are not in directory B. > I have used exceptions in other languages and only do so on logic that > should never happen.
Python is different than those languages. Exceptions are used much more frequently in Python and often for things that will *definitely* happen not just those things that shouldn't. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
