grab session id from edX cookie

grab-sessionid.py

def login(email, password, base_url='https://courses.edx.org'):
    """Login via HTTP and parse sessionid from the cookie."""
    r = requests.get('{}/login'.format(base_url))
    csrf = r.cookies['csrftoken']
    payload = {'email': email, 'password': password}
    cookies = {'csrftoken': csrf}
    headers = {'referer': '{}/login'.format(base_url), 'X-CSRFToken': csrf}
    r = requests.post('{}/user_api/v1/account/login_session/'.format(base_url),
                      data=payload, cookies=cookies, headers=headers)
    try:
        session_id = r.cookies['prod-edx-sessionid']  # production
    except KeyError:
        session_id = r.cookies['sessionid']  # sandbox
    if r.status_code != 200:
        raise RuntimeError('failed login')
    else:
        return session_id