import requests, lxml.html

# USERNAME = 'usuariox'
# PASSWORD = 'contraseniax'
# LOGIN_URL = 'http://apps.iplyc.gov.ar/ludopatia/login'
# URL = 'http://apps.iplyc.gov.ar/ludopatia/filter-autoexcluidos'


s = requests.session()

### Here, we're getting the login page and then grabbing hidden form
### fields.  We're probably also getting several session cookies too.
login = s.get('https://apps.iplyc.gov.ar/ludopatia/login', verify = False)
login_html = lxml.html.fromstring(login.text)
hidden_inputs = login_html.xpath(r'//form//input[@type="hidden"]')
form = {x.attrib["name"]: x.attrib["value"] for x in hidden_inputs}
print(form)

### Now that we have the hidden form fields, let's add in our
### username and password.
form['USERNAME'] = 'gaitacar' # Enter an email here.  Not mine.
form['PASSWORD'] = 'JYrjGNlAv334' # I'm definitely not telling you my password.
response = s.post('https://apps.iplyc.gov.ar/ludopatia/login', data=form)

### How can we tell that we logged in?  Well, these worked for me:
response.url
'usuariox' in response.text