[issue27984] singledispatch is wonky with enums

[Ethan Furman]

Ethan Furman added the comment:

> IS = Enum("IS", "a, b")

functools is meant to work with types, but the enum member "IS.a" is not a type -- however, the enum "IS" is a type.

Use "foo.register(IS)" instead.

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nosy: +ncoghlan, rhettinger

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27984>
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