login.py

#!/usr/bin/python2
import subprocess
import requests
import sys
import re

login_url = 'http://....'
login_user = 'foobar'
login_pass = '123123123'

other_url = 'http://......'

with requests.Session() as s:

    print "Login into %s as %s ..." % (login_url, translator_user)
    r1 = s.post(login_url, data={
        'username': login_user,
        'password': login_pass,
        'Login': 'Login'
    })

    print "Doing stuff logged in"
    r2 = s.get(other_url)