from requests import session

# ex) ID = abcd  / PW = 1234

payload = {
'ctl00$ContentPlaceHolder1$tbxLoginID' : 'abcd',
'ctl00$ContentPlaceHolder1$tbxLoginPW' : '1234'
}

with session() as c:
    c.post('http://www.kif.re.kr/kif2/login/login.aspx', data=payload)
    response = c.get('What should I write here?')
    # response = c.get('http://example.com/protected_page.php')
    print(response.headers)
    print(response.text)

payload = {
    '__LASTFOCUS': '',#empty
    '__VIEWSTATE': 'get this value from the login page source',
    '__VIEWSTATEGENERATOR': 'get this value from the login page source',
    '__EVENTTARGET': '',#empty
    '__EVENTARGUMENT': '',#empty
    '__EVENTVALIDATION': 'get this value from the login page source',
    'ctl00$agentPlatform': '1',
    'ctl00$menu_nav1$tbxSearchWord': '',#empty
    'ctl00$ContentPlaceHolder1$radiobutton':    '0',
    'ctl00$ContentPlaceHolder1$tbxLoginID': 'abcd',
    'ctl00$ContentPlaceHolder1$tbxLoginPW': '1234',
    'ctl00$ContentPlaceHolder1$ibtnLogin.x': '36', #i think this is the mouse cursor position
    #when clicked on login, not sure if its necessary
    'ctl00$ContentPlaceHolder1$ibtnLogin.y': '25'
}