Re: What's the use of the else in try/except/else?

[ma]

A really great use for try/except/else would be if an object is
implementing its own __getitem__ method, so you would have something
like this:

class SomeObj(object):
    def __getitem__(self, key):
                try:
                        #sometype of assertion here based on key type
                except AssertionError, e:
                        raise TypeError, e #invalid type
                else:
                        #continue processing, etc.. return some index, which 
will auto throw
                        #an index error if you have some type of indexable 
datastructure
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