Ezio Melotti added the comment:

That won't always work for case 1 (when theclass is e.g. 'date') and for case 4 
(even if it's unlikely).
Technically 2 loops should be enough, but without the sleep I don't think it 
matters much if it does 1 or 3 loops.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue15933>
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