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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 open(self):
        '''
        open the database
        '''
        self._connection = sqlite3.connect(self._dbname)
        self._cursor = self._connection.cursor()
        self._session_info = SessionInfoTable(self._connection, self._cursor)
        self._reports = ReportsTable(self._connection, self._cursor)