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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def home_slug():
 """ Returns the slug arg defined for the ``home`` urlpattern, which is the definitive source of the ``url`` field defined for an editable homepage object. """

    prefix = get_script_prefix()
    slug = reverse("home")
    if slug.startswith(prefix):
        slug = '/' + slug[len(prefix):]
    try:
        return resolve(slug).kwargs["slug"]
    except KeyError:
        return slug