The view hello.views.index didn't return an HttpResponse object. It returned None instead

from django.http import HttpResponse
from django.shortcuts import render
 
#def index(request):
    #return HttpResponse("Hello METANIT.COM")
 
from PyQt5.QtWidgets import QApplication
from PyQt5.QtCore import QUrl
from PyQt5.QtWebEngineWidgets import QWebEnginePage
import bs4 as bs
import urllib.request
import time
import re
import sys
import requests
 
regex = r"price_85d2b9c\s+\w+\D+(?P<price>\d+\s+\d+)"
 
class Client(QWebEnginePage):
    def __init__(self,url):
        global app
        self.app = QApplication(sys.argv)
        QWebEnginePage.__init__(self)
        self.html = ""
        self.loadFinished.connect(self.on_load_finished)
        self.load(QUrl(url))
       # time.sleep(20)
        self.app.exec_()
 
    def on_load_finished(self):
        self.html = self.toHtml(self.Callable)
        print("Load Finished")
 
    def Callable(self,data):
        self.html = data
        self.app.quit()
 
url = "https://www.aviasales.ru/search/PEE0112MOW23121?request_source=search_form&expected_price_currency=rub&expected_price_source=calendar"
client_response = Client(url)
print(client_response.html)
with open("test.html", "w", encoding="utf-8") as f:
    f.write(client_response.html)
 
 
    def index(request):
        test_str = client_response.html
 
        prices = []
        group = None
        matches = re.finditer(regex, test_str, re.MULTILINE)
#for i in range(1, 45):
    #def index(request):
        for matchNum, match in enumerate(matches, start=1):
            print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))
 
            for groupNum in range(0, len(match.groups())):
                groupNum = groupNum + 1
                #def index(request):
                #return HttpResponse("{group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))
                print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))
                prices.append(group)                                                               
                return render(request, "index.html", context={"prices": prices})
        print("{prices}")