test.py

    def test(self):
        try:
            for row in range(self.orders_table.rowCount()):
                for col in range(self.orders_table.columnCount()):
                    value = self.orders_table.item(row, col).text()
                    self.orders_table_list.append(value)
        except Exception as e:
            print(e)
            
Message in console: 'NoneType' object has no attribute 'text'