Inserting DateTime in a label when cliking a button in PyQt5

Question

I am experiencing some problems with my code whit PyQt5 interfaces (which I'm learning how it works yet). Here is my issue: I create a button and an empty label. This button, when clicked, should insert the current date and time inside the label. However it didn't work. What should I do? Here is my code:

from PyQt5 import uic, QtWidgets
from PyQt5.QtCore import QDateTime

def pagina_1():
    hoje = QDateTime.currentDateTime()
    heute = ponto_1.pushButton_3.clicked(hoje)

    linha1 = ponto_1.lineEdit_1.text()
    linha2 = ponto_1.lineEdit_2.text()
    linha3 = ponto_1.label_8.setText(heute)
    linha4 = ponto_1.timeEdit_4.text()
    linha5 = ponto_1.timeEdit_5.text()

    print('Nome: ', linha1)
    print('Número: ', linha2)
    print('Data: ', linha3)
    print('Entrada: ', linha4)
    print('Saída: ', linha5)

app = QtWidgets.QApplication([])
ponto_1 = uic.loadUi("ponto_1.ui")
ponto_1.pushButton_1.clicked.connect(pagina_1)
ponto_1.show()
app.exec()

below there is a printscreen of my app:

PyQt5_firstpage