[issue26988] Add AutoNumberedEnum to stdlib

[Barry A. Warsaw]

Barry A. Warsaw added the comment:

Hey, I just realized that you can get pretty darn close with just a little bit
of extra typing, and existing stdlib:

    from enum import Enum
    from itertools import count

    auto = count()

    class Color(Enum):
        red = next(auto)
        green = next(auto)
        blue = next(auto)

Look ma, no magic!

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26988>
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