import mechanize


BASE_URL = 'https://racetrac.empowerwfm.com/ESS/'

br = mechanize.Browser()

br.open(BASE_URL)

br.select_form(name='Form1')
form =  br.form

form['txtBadgeNumber'] = '123456'
form['txtPin'] = 'password123!'
r = br.submit()


print(r.read())

from bs4 import BeautifulSoup
import requests


BASE_URL = 'https://racetrac.empowerwfm.com/ESS/'
login_url = 'Login.aspx'
session = requests.Session()
response = session.get(BASE_URL + login_url, verify=False)
soup = BeautifulSoup(response.text)

txtBadgeNumber  = 123456
txtPin = 'password123'

__VIEWSTATE = soup.find(id='__VIEWSTATE')['value']
__EVENTARGUMENT = ''
__EVENTTARGET = 'btnLogin'
__VIEWSTATEGENERATOR = soup.find(id='__VIEWSTATEGENERATOR')['value']

payload = {'__VIEWSTATE' : __VIEWSTATE,
        '__EVENTARGUMENT' : __EVENTARGUMENT ,
        '__EVENTTARGET' : __EVENTTARGET ,
        '__VIEWSTATEGENERATOR' :     __VIEWSTATEGENERATOR ,
        'txtBadgeNumber' : txtBadgeNumber,
        'txtPin' : txtpin
        }

session.post(BASE_URL + login_url, params=payload)
print(session.get(BASE_URL + 'Timesheet.aspx').text)