PEP 318

[Skip Montanaro]

    Isaac> I disagree.  It's not just the compile which has to search for
    Isaac> that yield keyword, we human being reading other's uncommented
    Isaac> code (or mis-commented code) also has to do the same.  It would
    Isaac> do much good if the completely different call convention of
    Isaac> generator is made much more explicit in the definition of the
    Isaac> function.

You'll be free to write your generator functions like so:

    def generator(f):
        return f

    def silly_counter(n) [generator]:
        for i in range(10):
            yield n+i

It will just be a convention you adopt though, not a language rule.

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