dal.py

import requests
import re

regex=re.compile('<em>(\d*?) members total,')
with open('dalpass') as f:
    adminpass = f.read()

s = requests.Session()
d = {'adminpw': adminpass, 'admlogin': 'Let me in...'}
s.post('https://lists.wikimedia.org/mailman/admin/daily-article-l/', data=d)
r = s.get('https://lists.wikimedia.org/mailman/admin/daily-article-l/members')
count = regex.search(r.text).group(1)
print count