[issue9731] Add ABCMeta.has_methods and tests that use it

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

I wanted to propose the name check_methods, but then I thought that some people could read too much in that name, for example that arguments and return value are checked for correct type and value (see how Web people misunderstand “HTML validation”). That said, “check” promises less than “validate”, and ABCs being a middle-to-advanced topic, we could trust people using this method to read the docstring and not expect too much.

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<http://bugs.python.org/issue9731>
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