from requests import get
from bs4 import BeautifulSoup as Bs

header = {
    'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:74.0) Gecko/20100101 Firefox/74.0',
    'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
    'Accept-Encoding':'gzip, deflate, br',
    'Accept-Language':'ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3'
}

soup = Bs(get('https://finance.yahoo.com/quote/AFLT.ME?p=AFLT.ME&.tsrc=fin-srch', headers = header).text, 'lxml')
print(soup.find('span', {'data-reactid':'134'}).text)