from bs4 import BeautifulSoup
from urllib.request import urlopen

i=1
while i<=26:
	page=urlopen("https://e...content-available-to-author-only...b.ru/category/21/?page="+str(i))
	soup=BeautifulSoup(page, 'html.parser')
	urls_tag=soup.findAll(attrs={'class':'small'})

for element in urls_tag:
		urls.append(element.string)
i=i+1