This example will run silent and will return your balance only when the balance is updated.

# -*- coding: utf-8 -*-

from asyncio import run
import ccxt.pro as ccxt
from pprint import pprint


# This example will run silent and will return your balance only when the balance is updated.

# 1. launch the example with your keys and keep it running
# 2. go to the margin trading on the website
# 3. place a margin order on a spot market
# 4. see your balance updated in the example


async def main():
   exchange = ccxt.pro.binance({
       'apiKey': 'YOUR_API_KEY',
       'secret': 'YOUR_SECRET',
       'options': {
           'defaultType': 'margin',
       },
       # comment it out if you don't want debug output
       # this is for the demo purpose only (to show the communication)
       'verbose': True,
   })
   while True:
       try:
           balance = await exchange.watch_balance()
           # it will print the balance update when the balance changes
           # if the balance remains unchanged the exchange will not send it
           pprint(balance)
       except Exception as e:
           print('watch_balance() failed')
           print(e)
           break
   await exchange.close()


run(main())