from PyQt5.QtWidgets import (QApplication, QWidget, QPushButton, QHBoxLayout,

                                        QLineEdit)

from PyQt5.QtGui import *

from PyQt5.QtCore import *

import sys  

def clickHandle():

    ##main代表按钮的容器widget的对象

    button = main.sender()

    print(button.objectName())

if __name__ == '__main__':

    app=QApplication(sys.argv)

    main=QWidget()  

    latout = QHBoxLayout()

    main.setLayout(latout)

    but_1 = QPushButton('but_1')

    but_1.setObjectName('but_1')

    but_1.clicked.connect(clickHandle)

    but_2 = QPushButton('but_2')

    but_2.setObjectName('but_2')

    but_2.clicked.connect(clickHandle)

    edit_1 = QLineEdit()

    edit_2 = QLineEdit()

    latout.addWidget(but_1)

    latout.addWidget(but_2)

    latout.addWidget(edit_1)

    latout.addWidget(edit_2)

    main.show()

    app.exec_()