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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 _buildElementTree(self,):
 """Turn object into an Element Tree """


        t_paging = ctree.Element('paging')
        t_paging.set('model', self.model)
        for key in self.__dict__.keys():
            if key != 'model':
                t_tag = ctree.SubElement(t_paging, key)
                for item in self.__dict__[key].items():
                    t_tag.set(*item)

        self.etree = t_paging
        return  t_paging