QCalendarWidget как передать данные выбранные пользователем

# https://www.cyberforum.ru/python-graphics/thread2459799.html#post13601481
import sys
from PyQt5.QtWidgets import *
from datetime import datetime
 
class Example(QDialog):  
    def __init__(self):
        super().__init__()  
 
        self.cal = QCalendarWidget(self)
        self.cal.setGridVisible(True)
        self.cal.move(20, 20)
        self.cal.clicked.connect(self.evt_cal_clicked)
        self.cal.currentPageChanged.connect(self.evt_cal_cur_page_changed)
        self.cal.selectionChanged.connect(self.evt_cal_selection_changed)
 
        self.lbl1 = QLabel(self)
        date = self.cal.selectedDate()
        self.lbl1.setText(date.toString())
        self.lbl1.move(20, 250)
 
        self.lbl2 = QLabel(self)
        month = self.cal.monthShown()
        self.lbl2.setText(str(month))
        self.lbl2.move(150, 250)
        self.lbl2.resize(150, 10)
 
        self.setGeometry(100, 100, 500, 500)
        self.setWindowTitle('Calendar')
        self.show()
 
    dt = datetime.today()
    y = dt.year
    m = dt.month
    d = dt.day
 
    def currDateIsChanged(self):
        self.dt = self.cal.selectedDate()
        self.m = self.cal.monthShown()
        self.y = self.cal.yearShown()
        self.lbl1.setText(self.dt.toString())
        self.lbl2.setText(str(self.m) + ' ' + str(self.y))
        pass
 
    def evt_cal_clicked(self, date): 
        self.currDateIsChanged()
 
    def evt_cal_cur_page_changed(self, year, month): 
        self.currDateIsChanged()
 
    def evt_cal_selection_changed(self): 
        self.currDateIsChanged()
 
def main():
    app = QApplication(sys.argv)  
    ex = Example() 
    sys.exit(app.exec_())
 
 
if __name__ == '__main__': 
    main()