ZipProvider do not support resource_filename

Originally reported by: moimael (Bitbucket: moimael, GitHub: moimael)

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HI,

I use pkg_resources for a complex install script. This script is packaged as a .pyz. pkg_resources work when i use it to load modules inside my zip but do not work when I want to extract and have access to resource files via resource_filename.

here is the faulty method :

    if not self.egg_name:
        raise NotImplementedError(
            "resource_filename() only supported for .egg, not .zip"
        )

It would be really helpfull to have this, thx !

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• Bitbucket: https://bitbucket.org/pypa/setuptools/issue/402