python中多个QPushButton响应同一个事件

python中多个QPushButton响应同一个事件
注：在python2 的环境下运行

#! -*- coding:utf-8 -*-
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QHBoxLayout, QPushButton
import sys
class WindowDemo(QWidget):
    def __init__(self):
        super(WindowDemo, self).__init__()
        btn1 = QPushButton(u'单一保存', self)
        btn2 = QPushButton(u'连续保存', self)
        btn3 = QPushButton(u'暂停连续保存', self)
        btn1.clicked.connect(self.handle_camsave)
        btn2.clicked.connect(self.handle_camsave)
        btn3.clicked.connect(self.handle_camsave)
        hbox = QHBoxLayout()
        hbox.addWidget(btn1)
        hbox.addWidget(btn2)
        hbox.addWidget(btn3)
        hbox.addStretch(0)
        self.setLayout(hbox)
        self.setWindowTitle("addStretch 例子")
    def handle_camsave(self):

        sender = self.sender()
        clickevent = sender.text()
        if clickevent == u'单一保存':
            print(u'单击了第一个按钮')
        elif clickevent == u'连续保存':
            print(u'单击了第二个按钮')
        else:
            print(u'单击了第三个按钮')

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = WindowDemo()
    win.show()
    sys.exit(app.exec_())

效果图如下所示：