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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 stats(self):
 """ Database usage statistics. Used by quota. """

        res = {}
        db = self._collection.database
        res['dbstats'] = db.command('dbstats')
        res['data'] = db.command('collstats', self._collection.name)
        res['totals'] = {'count': res['data']['count'],
                         'size': res['data']['size']
                         }
        return res