paktpub.py

import requests
from bs4 import BeautifulSoup as Soup
import settings


sess = requests.Session()
resp = sess.get('https://www.packtpub.com/packt/offers/free-learning')
soup = Soup(resp.content, 'html.parser')
build_id_input = soup.select_one('#packt-user-login-form input[name=form_build_id]')

sess.post('https://www.packtpub.com/packt/offers/free-learning', data={
    'op': 'Login',
    'form_id': 'packt_user_login_form',
    'form_build_id': build_id_input['value'],
    'email': settings.email,
    'password': settings.password,
})