code: 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._cursorf 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)
docs: open the database