How to make tableWidget.setItem accept a python list?

[Lord Emperor]

I have a table that I fill with data from a JSON file.
But because one of the values is an array(that gets converted to a python list) I get an error.
How can I make it so that a tableWidget.setItem accepts a python list as a value for the cell of the table?
Previously I simply converted it to a string, and put that string into the QTableWidgetItem.
But I want to be able to later extract that data from a cell as a list, so that then I can convert it to JSON and save it.
I read the documentation, and supposedly this could be related to Subclassing, but I could not understand how it works.

Here is the part of my code:

for r in range(len(db_account_rows)):
    for c in range(len(db_account_columns)):
        self.tableWidget.setItem(r, c, QtWidgets.QTableWidgetItem(
                db_bot_accounts[list(db_account_rows)[r]][list(db_account_columns)[c]]
               # f'{db_bot_accounts[list(db_account_rows)[r]][list(db_account_columns)[c]]}'
                ))

The commented part is how it was previously.
And the uncommented part seems to work right until it encounters a python list in the dict that was created from JSON.

[jsulm]

@Lord-Emperor QTableWidgetItem has no constructor which takes any list/array.
You can use https://doc.qt.io/qt-6/qtablewidgetitem.html#setData to set a QVariant, but the question is: what should the table cell do with your list? How should it be shown?

[Lord Emperor]

@jsulm
Same as I did before, this list ca be represented simply as text.
Because I know this list is always going to be small.
"["item1", "item2", "item3", "item4"]"
But be stored in the background the same way as it was given to the cell.
So that when using self.tableWidget.item(_row, _column) I would get the exact same list I put in, and not a string of text.
How would one achieve that?
If possible can you please provide an example? I'm really new to QT, and a lot of concepts are way too new for me.

[SGaist]

Hi,

There's currently no real benefit with what you ask.

QTableWidgetItem does not handle lists the way you want it. You would also need a custom delegate to render that list which, while not complicated, would mean a lot of list to string operation. This mean burning CPUs for nothing. Doing a join when creating the item and a split when you want to retrieve the data is both simple and cost effective.