[issue20566] asyncio as_completed() thrashes adding and removing callbacks

[Guido van Rossum]

Guido van Rossum added the comment:

OK, code is ready for review at http://code.google.com/p/tulip/source/detail?r=674355412f33

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20566>
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