QSetting和QWidgets类序列化和反序列化

Question

有一个QComboBox QWidgets class，一个列表包含5次QComboBox QWidgets class。在PyQt5中带有classes of QWidgets的列表如何在以后保存和恢复（序列化和反序列化）？ 如果提供了下面的代码，那么使用QSetting可以实现此类类的序列化和反序列化吗

COMBO.py

from PyQt5 import QtWidgets, QtGui
class combo(QtWidgets.QWidget):
    def __init__(self, parent = None):
        super(combo, self).__init__(parent)
        layout = QtWidgets.QHBoxLayout(self)
        self.cb = QtWidgets.QComboBox()
        self.cb.addItems(["1", "2", "3","4"])
        self.cb.setCurrentIndex(2)
        pal = self.cb.palette()
        pal.setColor(QtGui.QPalette.Button, QtGui.QColor(255,255,255))
        self.cb.setPalette(pal)
        layout.addWidget(self.cb)

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    ex = combo()
    ex.show()
    sys.exit(app.exec_())

序列化和反序列化

from COMBO import combo
from PyQt5 import QtCore, QtWidgets, QtGui

def readSettings():
    settings = QtCore.QSettings('file.ini' ,QtCore.QSettings.IniFormat)
    settings.beginGroup("LIST")
    # Some code to restore classes
    settings.endGroup()

def writeSettings(CLASSLISTS):
    settings = QtCore.QSettings('file.ini' ,QtCore.QSettings.IniFormat)
    settings.beginGroup("LIST")
    # Some code to store classes
    settings.endGroup()   

CLASSLISTS = []

for _ in range(5):
    CLASSLISTS.append(combo())

print(CLASSLISTS)
writeSettings(CLASSLISTS)