Why is None returned when parsing?

Question

Python

You need to parse the bitcoin rate in real time. When the code is executed, None is returned, although there is such a class on the page and it is loaded immediately.

import requests
from bs4 import BeautifulSoup

url = 'https://www.tradingview.com/symbols/BTCUSD/?utm_campaign=tickers&utm_medium=widget&utm_source=xn----dtbfdbwspgnceulm.xn--p1ai'

HEADERS = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36 OPR/75.0.3969.259'}

source_code = requests.get(url, headers=HEADERS)
soup = BeautifulSoup(source_code.text, 'html.parser')
bitcoin_curse = soup.find('label', {'class': 'tab-HYHP1WHx tabSelected-HYHP1WHx'})
print(bitcoin_curse)

Answer 1

although there is such a class on the page and it is loaded immediately

It's not there. Even visually it is clear that it does not immediately appear. Data comes via wss

wss://data.tradingview.com/socket.io/websocket?from=symbols%2FBTCUSD%2F&date=2021_05_06-10_12

Once tradingview was parsed by order, it was possible to receive currencies through https://scanner.tradingview.com/crypto/scan of BINANCE :BTCUSDT and BINANCE:BTCRUB pairs . I have no idea how things are going there now, but it's better to look for another site for the course