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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 _permalink(self, absolute=False, expand=True, **kwargs):
 """ Returns a canonical URL for the item """

        return flask.url_for('entry',
                             entry_id=self._record.id,
                             category=self._record.category if expand else None,
                             slug_text=self._record.slug_text if expand else None,
                             _external=absolute,
                             **kwargs)