Stop or pause python script from running or Complete the whole script

Question

import sys
import requests
from PyQt5.uic import loadUi
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QDialog, QApplication


class MainWindow(QDialog):
    def __init__(self):
        super(MainWindow, self).__init__()
        loadUi("tabletutorial.ui",self)
        self.request_function()

    
    def request_function(self):
        for i in range(0,100):
            resp=requests.get("https://www.google.com")
            print(resp.status_code)



# main
app = QApplication(sys.argv)
mainwindow = MainWindow()
widget = QtWidgets.QStackedWidget()
widget.addWidget(mainwindow)
widget.setFixedHeight(850)
widget.setFixedWidth(1120)
widget.show()
try:
    sys.exit(app.exec_())
except:
    print("Exiting")

Now the problem is when i quit the pyqt5 window the script is still running and i am getting the status code .I am running a big application with a bunch of requests.Anyone with relatable solution please ?

I TRIED:

self.close() not worked for me. @QtCore.pyqtSlot() also not worked.