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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 _load(self):
 """ Load the database from its ``dbfile`` if it has one """

        if self.dbfile is not None:
            with open(self.dbfile, 'r') as f:
                self._db = json.loads(f.read())
        else:
            self._db = {}