[issue10437] ThreadPoolExecutor should accept max_workers=None

[Brian Quinlan]

Brian Quinlan <brian at sweetapp.com> added the comment:

I think that using the number of CPUs for max_workers makes sense for you but won't for most users. So I wouldn't make it a default.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10437>
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