izvestia.py

from urllib.request import urlopen
from concurrent import futures
import pickle

site = "http://izvestia.ru/news/"
last_publication = 646946
start = 500000
answer = []

def get_page(n):
    api_html = urlopen(site+str(n)).read().decode()
    answer.append(api_html)
    print('\r', len(answer), end="")

with futures.ThreadPoolExecutor(50) as executor:
    executor.map(get_page, range(start, last_publication))

pickle.dump(answer, open('izvestya.pck','wb'))