An alternative that solves this would be to give __next__() a second argument, which is a bool that should be true when the first argument is an exception that should be raised. What do people think?
I'll add this to the PEP as an alternative for now.
An optional third argument (raise=False) seems a lot friendlier (and more flexible) than a typecheck.
Yet another alternative would be for the default behaviour to be to raise Exceptions, and continue with anything else, and have the third argument be "raise_exc=True" and set it to False to pass an exception in without raising it.
Cheers, Nick.
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Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia
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http://boredomandlaziness.skystorm.net
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