Mmmmh ... why introduce a new flag ? Can't you just test the presence of the "__error__" method ? This would lift your problem wouldn't it ?
Perhaps - it would require doing something a little tricky with generators to allow the programmer to specify whether the generator should be finalised or not.
Cheers, Nick.
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Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia
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http://boredomandlaziness.skystorm.net
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