PyQt5 日历控件（QCalendarWidget）

cal = QCalendarWidget(self)

cal.clicked[QDate].connect(self.showDate)

.toString()

from PyQt5.QtWidgets import (QWidget, QCalendarWidget, 
    QLabel, QApplication, QVBoxLayout)
from PyQt5.QtCore import QDate
import sys
class Example(QWidget):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
    def initUI(self):      
        
        vbox = QVBoxLayout(self)
        cal = QCalendarWidget(self)#创建日历控件
        cal.setGridVisible(True)#设置网格可见
        
        #点击日期时会发射.clicked 信号，信号参数类型为PyQt5.QtCore.QDate
        cal.clicked[QDate].connect(self.showDate)#信号参数类型设置
        
        vbox.addWidget(cal)
        
        self.lbl = QLabel(self)
        date = cal.selectedDate()
        self.lbl.setText(date.toString())
        vbox.addWidget(self.lbl)
        self.setLayout(vbox)
        self.setGeometry(300, 300, 350, 300)
        self.setWindowTitle('Calendar')
        self.show()
        
    def showDate(self, date):#date为clicked信号传进来的参数，QDate类型
        self.lbl.setText(date.toString())
        print(date.toString(),"\n",date)
         
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())