How can i remember the previsiously selected item of a QlistWidget

Is there another way to remember previously selected items of a QlistWidget without making lists? in the example below I tried to do it, only I can't check the items while reading the dictionary list. here is my sample code:

from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtWidgets import (QWidget, QListWidget, QVBoxLayout, QApplication) from datetime import date, timedelta

class Ui_Dialog(object): def setupUi(self, Dialog): Dialog.setObjectName("Dialog") Dialog.resize(532, 292) self.lists={} self.itm=0 self.pushButton_ok = QtWidgets.QPushButton(Dialog) self.pushButton_ok.setGeometry(QtCore.QRect(336, 251, 88, 34)) self.pushButton_ok.setObjectName("pushButton_ok") self.pushButton_anulla = QtWidgets.QPushButton(Dialog) self.pushButton_anulla.setGeometry(QtCore.QRect(426, 251, 88, 34)) self.pushButton_anulla.setObjectName("pushButton_anulla") self.widget = QtWidgets.QWidget(Dialog) self.widget.setGeometry(QtCore.QRect(5, 13, 520, 221)) self.widget.setObjectName("widget") self.gridLayout = QtWidgets.QGridLayout(self.widget) self.gridLayout.setContentsMargins(10, 10, 10, 10) self.gridLayout.setObjectName("gridLayout") self.listWidgetdate = QtWidgets.QListWidget(self.widget) self.listWidgetdate.setObjectName("listWidgetdate") self.gridLayout.addWidget(self.listWidgetdate, 0, 1, 1, 1) self.listWidgetlav = QtWidgets.QListWidget(self.widget) self.listWidgetlav.setObjectName("listWidgetlav") item = QtWidgets.QListWidgetItem() self.listWidgetlav.addItem(item) self.gridLayout.addWidget(self.listWidgetlav, 0, 0, 1, 1)

    self.listWidgetlav.currentItemChanged.connect(self.itemActivated_event)
    self.list1=["B","C","D"]
    for i in range(len(self.list1)):
        item = QtWidgets.QListWidgetItem()
        self.listWidgetlav.addItem(item)
        item.setText(self.list1[i])
    self.listWidgetlav.setCurrentRow(0)
     

    self.retranslateUi(Dialog)
    QtCore.QMetaObject.connectSlotsByName(Dialog)

def retranslateUi(self, Dialog):
    _translate = QtCore.QCoreApplication.translate
    Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
    self.pushButton_ok.setText(_translate("Dialog", "Ok"))
    self.pushButton_anulla.setText(_translate("Dialog", "Anulla"))
    __sortingEnabled = self.listWidgetdate.isSortingEnabled()
    self.listWidgetdate.setSortingEnabled(False)
    self.listWidgetdate.setSortingEnabled(__sortingEnabled)
    __sortingEnabled = self.listWidgetlav.isSortingEnabled()
    self.listWidgetlav.setSortingEnabled(False)
    item = self.listWidgetlav.item(0)
    item.setText(_translate("Dialog", "A"))
    self.listWidgetlav.setSortingEnabled(__sortingEnabled)

     

def load_item(self): 
    self.list2=self.dates(date(2019,5,3),date(2019,5,6))
    self.listWidgetdate.clear()
    for i in range(0,self.listWidgetdate.count()):
        self.listWidgetdate.takeItem(i)
    for i in range(len(self.list2)):
        item1 = QtWidgets.QListWidgetItem()
        self.listWidgetdate.addItem(item1)
        item1.setText(self.list2[i])
        item1.setFlags(QtCore.Qt.ItemIsUserCheckable|QtCore.Qt.ItemIsEnabled)
        item1.setCheckState(QtCore.Qt.Unchecked)
             

def itemActivated_event(self):
    self.make_settigs(self.listWidgetlav.currentRow())
    self.load_item()
    print(self.listWidgetlav.currentRow())

def on_clicked(self):
    self.list_of_imp=[]
    for row in range(0, self.listWidgetdate.count()):
        it = self.listWidgetdate.item(row)
        if it.checkState() == QtCore.Qt.Checked:
            # print(it.text())
            self.list_of_imp.append(True)
        else:self.list_of_imp.append(False)
    return self.list_of_imp

def dates(self,datein,dateout):
    self.list_dates=[]
    # start_date = datein
    # end_date = dateout

    st_date = datein
    ed_date = dateout

    delta = ed_date - st_date

    for i in range(delta.days+1):
        day =st_date + timedelta(days=i)
        e=str(day)
        self.list_dates.append(e)

    return self.list_dates

def make_settigs(self,ind):
    self.tmp=self.on_clicked()
    self.lists['lst'+str(self.itm)]=self.tmp
    self.current=ind
    checked=2
    unchecked=0
-----   The problem is here ------
    try:
        if len(self.lists['lst'+str(self.current)])!=0:
            for i in range(len(self.lists['lst'+str(self.current)])):
                it = self.listWidgetdate.item(i)
                if (self.lists['lst'+str(self.current)][i])==True:
                    if it.checkState() == QtCore.Qt.Unchecked:
                        print(it.checkState, "------checked--------")
                        it.setCheckState(checked)
                    else:
                        it.setCheckState(checked)
                elif (self.lists['lst'+str(self.current)][i])==False:
                    if it.checkState() == QtCore.Qt.Checked:
                        print(it.checkState, "-----unchecked---------")
                        it.setCheckState(unchecked)
                    else:
                        it.setCheckState(unchecked)

    except: print("We don t have the list yet")

    self.lists['lst'+str(self.itm)]=self.tmp
    self.itm=ind


    print(self.lists)

    

if name == "main": import sys app = QtWidgets.QApplication(sys.argv) Dialog = QtWidgets.QWidget() ui = Ui_Dialog() ui.setupUi(Dialog) Dialog.show() sys.exit(app.exec_())