I found an example of using QAbstractItemModel with QTreeView that was written using PyQt4. I have adjusted the code for my need and used the PySide6. Majority of functionality is working apart of one – when I click the button with the name of the project it gives me an error:

I have a script that contains 4 classes: class Node, class TreeViewModel, class Prj_Collection and class Prj.

I need to show a MessageBox to let the user deicide if He wants to overwrite a file.

I need to disable the button until the function is completed.

I need to disable the button until the function is completed.

I have a GUI and I want to connect a slider and a label showing the current slider value.
The QSlider.valueChanged event returns an integer, while QLabel.setText needs a string. Is there a possibility, to connect these both elements in one line instead of writing an extra function?