def _platform_tags():
    # type: () -> Iterator[str]
    """
    Provides the platform tags for this installation.
    """
    if platform.system() == "Darwin":
        return mac_platforms()
    elif platform.system() == "Linux":
        return _linux_platforms()
    else:
        return _generic_platforms()

    Provides the platform tags for this installation.
    
src/pkg_resources/_vendor/packaging/tags.py