PyQt5--EventSender

 # -*- coding:utf-8 -*-
 '''
 Created on Sep 14, 2018

 @author: SaShuangYiBing

 Comment: This example is show which sender was triggered.
 创建了两个按钮。在buttonClicked()方法中通过调用sender()方法来判断当前按下的是哪个按钮
 '''
 import sys
 from PyQt5.QtWidgets import QApplication,QMainWindow,QPushButton

 class New_test(QMainWindow):
     def __init__(self):
         super().__init__()
         self.initUI()

     def initUI(self):
         btn1 = QPushButton('Button1',self)
         btn1.move(30,50)
         btn2 = QPushButton('Button2',self)
         btn2.move(150,50)

         btn1.clicked.connect(self.buttonClicked)
         btn2.clicked.connect(self.buttonClicked)

         self.statusBar()

         self.setGeometry(300,300,290,150)
         self.setWindowTitle('Event Sender')
         self.show()

     def buttonClicked(self):
         sender = self.sender()
         self.statusBar().showMessage(sender.text() + ' was pressed')  # 通过调用sender()方法来判断信号源， 并将其名称显示在窗体的状态栏中

 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = New_test()
     sys.exit(app.exec_())

按下 button1时在status bar的提示语：

按下 button2时在 status bar的提示语：