from librouteros import connect
from tkinter import *

ROUTER_API_IP = '192.168.1.1'
ROUTER_API_PORT = '8728'
ROUTER_API_USER = 'admin'
ROUTER_API_PASSWORD = 'pwd'
ROUTER_MANGLE_UPLOAD = 'UPLOAD'
ROUTER_MANGLE_DOWNLOAD = 'DOWNLOAD'

api = connect(host=ROUTER_API_IP, username=ROUTER_API_USER, password=ROUTER_API_PASSWORD, port=ROUTER_API_PORT)


def task():
    out = api(cmd='/ip/firewall/mangle/print')
    for value in out:

        if value['comment'] == ROUTER_MANGLE_UPLOAD:
            val = int(value['bytes']) / 1024 / 1024
            upl.set("%.2f MB" % val)

        if value['comment'] == ROUTER_MANGLE_DOWNLOAD:
            val = int(value['bytes']) / 1024 / 1024
            down.set("%.2f MB" % val)

    top.update()
    top.after(400, task)


# GUI definition
top = Tk()

down = StringVar()
upl = StringVar()
text1 = Label(top, textvariable=down, font="Tahoma 120 bold", fg="darkgreen", )
text2 = Label(top, textvariable=upl, font="Tahoma 60 bold", fg="blue")
text1.pack()
text2.pack()

down.set("---")
upl.set("---")

top.after(100, task)
top.mainloop()