[issue18373] implement sys.get/setbyteswarningflag()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Read only access to bytes warning flag already implemented as sys.flags.bytes_warning. How new functions are related to it?

And I concur with David. Why not just run your program with -b or -bb? Besides the testing purpose.

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nosy: +serhiy.storchaka

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<http://bugs.python.org/issue18373>
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