[issue19280] Add a datatype to represent mime types to the email module

[Antoine Pitrou]

Antoine Pitrou added the comment:

I don't know much about the email module, but FWIW I think str subclasses (or any subclass of built-in types) are a delicate thing to expose in an API. I think a namedtuple would be the more idiomatic choice here (perhaps with an appropriate __str__ for convenient conversion / %-formatting / {}-formatting).

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nosy: +pitrou

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<http://bugs.python.org/issue19280>
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