Заполнить форму авторизации и залогиниться на сайт (BeautifulSoap)

A = cols[0].input
B = str(A)
C = ' value="мой логин"/>'
 
print(B[:-2] + C) # Login
 
A2 = cols[1].input
B2 = str(A2)
C2 = ' value="мой пароль"/>'
 
print(B2[:-2] + C2) #password

import urllib.request
from lxml import html
import requests
 
def get_html(url):
    page = requests.get('http://mail.ru')
    #response1 = HTMLresponse(url)
 
    print(page)
    #return page.read()
 
 
def main():
    get_html('http://mail.ru')
 
if __name__ == '__main__':
    main()

import requests
import lxml.html
 
from lxml import html
 
 
login = ''
password = ''
 
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.0; rv:14.0) Gecko/20100101 Firefox/14.0.1',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Language': 'ru-ru,ru;q=0.8,en-us;q=0.5,en;q=0.3',
    'Accept-Encoding': 'gzip, deflate',
    'Connection': 'keep-alive',
    'DNT': '1'
}
session = requests.session()
 
page = lxml.html.fromstring(session.get('http://m.vk.com/').content)
form = page.forms[0]
form.fields['email'] = login
form.fields['pass'] = password
r = session.post(form.action, data=form.form_values())
 
 
r2 = session.post('http://vk.com/video.php')
print(r.text)

session.headers = headers

import requests
import lxml.html
 
from lxml import html
 
 
login = ''
password = ''
 
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.0; rv:14.0) Gecko/20100101 Firefox/14.0.1',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Language': 'ru-ru,ru;q=0.8,en-us;q=0.5,en;q=0.3',
    'Accept-Encoding': 'gzip, deflate',
    'Connection': 'keep-alive',
    'DNT': '1'
}
session = requests.session()
 
page = lxml.html.fromstring(session.get('http://m.vk.com/').content)
form = page.forms[0]
form.fields['email'] = login
form.fields['pass'] = password
r = session.post(form.action, data=form.form_values())
 
 
r2 = session.post('http://vk.com/video.php')
print(r.text)