QTableWidgetItem - type

MasterQ

Hi,

I am fiiling a QTableWidget with data while the QTableWidgetItems are generated by two different ways.

self.ui.tableEntries.setItem(0, ABVF.BESCHREIBUNG, QTableWidgetItem("any text"))

and

witem = QTableWidgetItem(locale.format_string("%.2f", 3.14159, True, True))
witem.setTextAlignment(Qt.AlignmentFlag.AlignVCenter | Qt.AlignmentFlag.AlignRight)
self.ui.tableEntries.setItem(0, ABVF.AUSGABE, witem)

When I then want to access the items by another method

self.ui.tableEntries.item(0, ABVF.BESCHREIBUNG).data(Qt.ItemDataRole.DisplayRole)
self.ui.tableEntries.item(0, ABVF.AUSGABE).data(Qt.ItemDataRole.DisplayRole)

I get errors.

For column ABVF.BESCHREIBUNG everything works fine, for column ABVF.AUSGABE I get

AttributeError: 'NoneType' object has no attribute 'data'. This depends not on the column index, since I have more than one column set by each way. If the QTableWidgetItem is created directly in the setItem-method is different as if created separately.

Why is QTableWidgetItem for column ABVF.AUSGABE a NoneType?

All data are shown correctly in the table! No column is missing, all cells are filled!

The constructor of QTableWidgetItem has a default parameter type:int. What is meant by that parameter? Is this one of QTabWidgetItem.ItemType? Trying

witem = QTableWidgetItem(locale.format_string("%.2f", 3.15149, True, True), QTableWidgetItem.ItemType.Type)

changes nothing.

--EDIT:--

it is coming from locale.string_format. I have still no clue why.

MasterQ

OK, I found my mistake.

It is not because of locale.string_format. Two of the columns are to separated positive and negative values. One is holding all positives and the other all negativs.

If a positive value is found I created a QTableWidgetItem for the 'positive' column but forgott the create one for the 'negative' column and vice versa.

Stupid!

JonB

@MasterQ
You will get the NoneType if there is indeed no QTableWidgetItem at the specified row, column. Either of the two methods you show should work fine. Consequently please set up a standalone project and test both in (0, 0) and (0, 1) respectively. If that goes wrong please post your exact, minimal code.

JonB

@MasterQ said in QTableWidgetItem - type:

it is coming from locale.string_format. I have still no clue why.

Start, as ever, by simplifying. Remove the , True, True. Try with a format simpler than %.2f. Maybe set locale.setlocale(locale.LC_ALL, '') before the call.

MasterQ

OK, I found my mistake.

It is not because of locale.string_format. Two of the columns are to separated positive and negative values. One is holding all positives and the other all negativs.

If a positive value is found I created a QTableWidgetItem for the 'positive' column but forgott the create one for the 'negative' column and vice versa.

Stupid!