[FIXED] Set table values on pyqt5 in pageload throws AttributeError

Issue

I am trying to set pyqt5 Qtablewidget items on pageload using a helper class and method. This is my code.

#ui - > UI mainwindow class
#examdetails -> a list of dictionaries (table from database)  
def setExamRecords(self,ui,examDetails):
    for rowIndex,exam in enumerate(examDetails):
        for colIndex,key in enumerate(exam):
            print(exam[key])
            item = ui.tableWidget.item(rowIndex, colIndex)
            item.setText(str(exam[key]))
    return True

However this returns error AttributeError: 'NoneType' object has no attribute 'setText'

is it not possible to set the ui elements in a separate class like this? The reason to moving to a separate helper class is mainly to reduce the codes clogging up in the main ui class.

Solution

The existence of an empty cell does not imply that it is associated with a QTableWidgetItem, therefore the item() method returns None. A possible solution is to check if it is None or not, if it is then create the QTableWidgetItem and set it with setItem():

def setExamRecords(self, ui, examDetails):
    for rowIndex, exam in enumerate(examDetails):
        for colIndex, key in enumerate(exam):
            print(exam[key])
            item = ui.tableWidget.item(rowIndex, colIndex)
            if item is None:
                item = QTableWidgetItem()
                ui.tableWidget.setItem(rowIndex, colIndex, item)
            item.setText(str(exam[key]))
    return True

Another possible solution is to use the model where if each cell is associated with a QModelIndex:

def setExamRecords(self, ui, examDetails):
    for rowIndex, exam in enumerate(examDetails):
        for colIndex, key in enumerate(exam):
            index = ui.tableWidget.model().index(rowIndex, colIndex)
            ui.tableWidget.model().setData(index, str(exam[key]))
    return True

Answered By - eyllanesc