import getpass
import requests
from requests.auth import HTTPBasicAuth
from bs4 import BeautifulSoup as BS
headers = {'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0',}

username = input('Username: ')
password = getpass.getpass('Password: ')

s = requests.Session()

rpost = s.post(url='http://192.168.1.1/login_security.html',
                auth=HTTPBasicAuth(username,password),
                headers=headers)

rget = s.get('http://192.168.1.1/rpSys.html',)

soup = BS(rget.text, "lxml")
print(soup.prettify)