Python 以编程方式调用复选框上的切换会破坏pyqt5中的gui

我正在创建一个设置小部件，用户在其中单击复选框以选择其首选设置。我希望有一个“放弃更改”按钮，按下该按钮时，复选框选择将恢复到上次保存

为此，我在字典中保存了上次保存时复选框的状态，当调用discard changes时，它将在字典中循环，如果复选框的值为True，我将切换，如果为False，我将不切换。执行此操作时，gui中断，复选框消失

我已经做过实验，发现如果我调用x.setChecked（True）一次，它就会工作，但如果在另一个复选框上再次调用toggle，它就会崩溃。任何帮助都将不胜感激

class GlobalSettings(QtWidgets.QWidget, Ui_Form):

    def __init__(self, parent=None):
        QtWidgets.QWidget.__init__(self, parent)
        self.parent = parent
        self.setupUi(self)
        self.descList = [] #list that holds tire description elements in order
        self.metaHeader = []
        self.savedSettings = {}
        self.tempSettings = {}



    def __guiSetup__(self):
        self.metaCustomLine.setReadOnly(True)
        self.metaConstructionCode.toggle()

        self.tempSettings[self.metaCommandFileName] = False
        self.tempSettings[self.metaConstructionCode] = True
        self.tempSettings[self.metaDescription] = False
        self.tempSettings[self.metaDiameter] = False
        self.tempSettings[self.metaManufacturerDesc] = False
        self.tempSettings[self.metaRimDescription] = False
        self.tempSettings[self.metaRimMaterialDesc] = False
        self.tempSettings[self.metaSerialNumber] = False
        self.tempSettings[self.metaSize] = False
        self.tempSettings[self.metaTestTypeDesc] = False
        self.tempSettings[self.metaTestTypeID] = False
        self.tempSettings[self.metaTitle] = False
        self.tempSettings[self.metaWidth] = False

        for x in self.tempSettings:
            self.savedSettings[x] = self.tempSettings[x]


    def discardChanges(self):
        for x in self.savedSettings:
            if self.savedSettings[x]:
                x.setChecked(True)
            else:
                x.setChecked(False)


    def refresh(self):
        return 1

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在循环中处理信号时，调用qtwidts.QApplication.processEvents（）似乎是必要的

def discardChanges(self):
    for x in self.savedSettings:
        if self.savedSettings[x]:
            x.setChecked(True)
            QtWidgets.QApplication.processEvents()
        else:
            x.setChecked(False)
            QtWidgets.QApplication.processEvents()