Delete Qt Layout manager

[deanhystad]

I cannot find a way to change the layout manager for a Qt widget. In the code below I first set the layout manager to a horizontal box layout and then try to set it to a grid layout. From the output you can see that the layout remains a horizontal box layou

import sys
import PySide6.QtWidgets as QtWidgets

class Test(QtWidgets.QWidget):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.setLayout(QtWidgets.QHBoxLayout())
        self.setLayout(QtWidgets.QGridLayout())
        print(self.layout())

QtWidgets.QApplication(sys.argv)
Test()

Output:
<PySide6.QtWidgets.QHBoxLayout(0x1731138e8a0) at 0x000001731242AA00>

Qt documentation says you have to delete the old layout before setting a new layout. So I tried the code below which gives me a syntax error on line 9 saying "Cannot delete function call".

class Test(QtWidgets.QWidget):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.setLayout(QtWidgets.QHBoxLayout())
        del self.layout()
        print(self.layout())

So I use a local variable to reference the layout widget and tried again.

class Test(QtWidgets.QWidget):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.setLayout(QtWidgets.QHBoxLayout())
        temp = self.layout()
        delete temp
        print(self.layout())

This code runs, but it does not remove the layout widget. I still get the QHBoxLayout when printing self.layout()

Does anyone have an idea how I can replace the existing layout?