> I think that the names in __all__ should have the same NFKC normalisation applied as the identifiers.
 
Does it make sens to add to this issue : Ensure that all elements of __all__ are str ? (At least emit a warning ?)

I have encounter a small number of libraries where some member of all are the actual objects. Easy mistake to make if you make a public decorator:

    __all__ = []

    def public(o):
        __all__.append(o)
        return o

    @public
    def bar():
        pass

Happy to open a different issue if deemed necessary. Thanks !