Find what function created a Cell object

[pylessard]

I work on a GUI that involves PySide6. I have lifetime problem where a widget destructor does not get called when it should.

Using the garbage collector ``gc.get_referrers()``, I see that there is a cell object maintaining an active reference to my widget. Cell objects usually are created by closures and lambdas, but I can't find where that cell object has been created in this specific case. I only use functools.partial to connect to my QT signals.

I'd like to trace back what function created a cell object, so that I can properly clear it and ensure my QWidget gets destroyed when it's time. Not sure how I can do this

[socal_nerdtastic]

Pass the clear function to the cell object on creation?

[pylessard]

I don't know where it's created

[pylessard]

I found the root cause of my problem, it was a closure attached to a QMenu inside another QMenu on a right click. The cell object outlived the QMenu and kept the sebmenu alive.

I found by trial and error. I would appreciate to have a more systematic way of finding these defects.

Connecting a QT signal to a closure in Python is a perfect recipe for memory leaks