setMargin() 方法不适用于 Qt Python 中的 QVBoxLayout

Question

I use PySide instead, therefore in my program, instead

from PySide.QtGui import QVBoxLayout

Normally it works for importing but then when I called method .setMargin() as the tutorial : https://doc.qt.io/qtforpython/tutorials/expenses/expenses.html#right-side-layout , I got an error:

self.right = QVBoxLayout()
self.right.setMargin(10)

AttributeError: 'PySide.QtGui.QVBoxLayout' object has no attribute 'setMargin'

I tried to find the setMargin() in the library and it appear here: https://doc.qt.io/qtforpython/PySide2/QtWidgets/QLayout.html#PySide2.QtWidgets.PySide2.QtWidgets.QLayout.setMargin . That means I can call it by importing QLayout from Pyside.QtGui but that doesn't work. The cmd say:

NotImplementedError: 'QLayout' represents a C++ abstract class and cannot be instantiated

Could you please show me how to use setMargin() by an alternative way in my case?

Answer 1

setMargin() does not exist in Qt4 (PySide), it existed in initial versions of Qt5 but is currently deprecated, instead you must use the setContentsMargins() method:

self.right = QVBoxLayout()