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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 new(cls, package):
 """Return newly created footer part."""

        partname = package.next_partname("/word/footer%d.xml")
        content_type = CT.WML_FOOTER
        element = parse_xml(cls._default_footer_xml())
        return cls(partname, content_type, element, package)