[PYTHON 2.7, and 3 maybe] xat mobile login

import requests
import json
import sys
import os
from xml.etree import ElementTree as etree

def login(username, password, force=False):
    folder = "./.data/"
    if not os.path.exists(folder):
        os.makedirs(folder)
    info_file = folder+username.lower()+".json"
    try:
        with open(info_file,"r") as f: f.close() #Create file if not exists
    except:
        with open(info_file,"w") as f: f.close() #Create file if not exists
    with open(info_file,"r+") as f:
        data = f.read()
        f.seek(0)

        if data == "":
            data = "{}"
        data = json.loads(data)

        device_id = data["d"] if "d" in data else ""

        if type(data) != dict:
            if not force:
                return data[1]
            device_id = data[0]

        headers = {
            'Pragma': 'no-cache',
            'Origin': 'https://xat.com',
            'Accept-Encoding': 'gzip, deflate, br',
            'Accept-Language': 'en-US,en;q=0.8',
            'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36',
            'Content-type': 'application/x-www-form-urlencoded',
            'Accept': '*/*',
            'Cache-Control': 'no-cache',
            'Referer': 'https://xat.com/login',
            'Connection': 'keep-alive',
        }

        params = (
            ('v', '1.9.2'),
            ('m', '7'),
            ('sb', '1'),
            ('', ''),
        )

        data = [
            ('json', '{"M": "0", "P": "", "d": "'+device_id+'", "n": "'+username+'", "nfy": "", "oi": "0", "p": "'+password+'", "pt": "3", "t": ""}'),
        ]

        res = requests.post('http://mt.xat.com/web_gear/chat/mlogin2.php?v=1.9.2&m=7&sb=1&', headers=headers, data=data)

        data = json.loads(res.text)

        if type(data) == int:
            print("Error... #"+str(data))
            if data == 1:
                print("Login blocked. Wait a while before trying again lol.")
            print("I actually have no clue what any of the rest mean, good luck.")
            sys.exit(0)

        if "d" in data:
            f.write(json.dumps(data))
            print(data["s"])
            f.truncate()
            sys.exit()
        elif "v" in data:
            data = etree.XML(data["v"])
            if "e" in data.attrib:
                print("Incorrect password.")
                sys.exit()
            f.write(json.dumps([device_id, data.attrib]))
            data = data.attrib

        f.truncate()

        return data

login_data = login("username", "password")

print(login_data)

"""
Should return something like
{
    "d0":"123456789",
    "d3":"1234567",
    "dt":"123456789",
    "i":"123456789",
    "n":"Username",
    "k2":"123456789",
    "k3":"123456789",
    "k1":"6896uteriojtfhsdkl"
}
"""