How to keep track of changes on the site?

Question

beautiful soup

There is a task - you need to be the first to receive a fresh ad on Avito.
I don't know Python as a language. But he still managed to throw something on his own.

I settled on this - how now to keep track of when a new ad appears? (We are talking about seconds, you need to get the data of a newly arrived ad in a few seconds)

In which direction to dig?
Here is the code:

import requests
from bs4 import BeautifulSoup

URL = 'https://www.avito.ru/novosibirsk/kvartiry/prodam-ASgBAgICAUSSA8YQ?cd=1&f=ASgBAQICAUSSA8YQAUCQvg0Ulq41&proprofile=1&s=104'
HEADERS = {'user-agent': 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36', 'accept': '*/*'}
HOST = 'https://www.avito.ru'

def get_html(url, params=None):
    r = requests.get(url, headers=HEADERS, params=params)
    return r

def get_content(html):
    soup = BeautifulSoup(html, 'html.parser')
    item = soup.find('div', class_='item__line')

    aparts = []
    # for item in items:
    M = item.find('span', class_='snippet-link-name').get_text(strip=True).find('м')
    SLASH = item.find('span', class_='snippet-link-name').get_text(strip=True).find('/')
    STREET = item.find('span', class_='item-address__string').get_text(strip=True)
    house = item.find('span', class_='item-address__string').get_text(strip=True).replace('д. ', '').replace('стр. ', '')
    rooms = item.find('span', class_='snippet-link-name').get_text(strip=True)[:1]
    meters = item.find('span', class_='snippet-link-name').get_text(strip=True)

    if rooms == 'К':
        rooms = '1'
        meters = meters[17:M-1]
    else:
        meters = meters[14:M-1]

    if STREET.find('у') == 0:
        street = item.find('span', class_='item-address__string').get_text(strip=True).split(', ')[0].replace('ул. ', '')
    else:
        street = item.find('span', class_='item-address__string').get_text(strip=True).split(', ')[-2].replace(' ул.', '')

    aparts.append({
        'price': item.find('span', class_='snippet-price').get_text(strip=True).replace('  ₽', '').replace(' ', '')[:-3],
        'rooms': rooms,
        'meters': meters,
        'floor': item.find('span', class_='snippet-link-name').get_text(strip=True)[M+4:SLASH],
        'street': street,
        'house': house.split(', ')[-1],
        'link': HOST + item.find('a', class_='snippet-link').get('href'),
    })
    print(aparts)

def parse():
    html = get_html(URL)
    if html.status_code == 200:
        get_content(html.text)
    else:
        print('Error')

parse()

Answer 1

Dig towards learning their API.

Answer 2

I have parsing of any section in php, if I finish it a little - in principle, you can run it at least once a second, but I don’t even know how to help you - drag the whole code here or something