Watch All Symbols

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

import asyncio
import ccxt.pro


async def loop(exchange, symbol, n):
   i = 0
   while True:
       try:
           orderbook = await exchange.watch_order_book(symbol)
           # print every 100th bidask to avoid wasting CPU cycles on printing
           if not i % 100:
               # i = how many updates there were in total
               # n = the number of the pair to count subscriptions
               now = exchange.milliseconds()
               print(exchange.iso8601(now), n, symbol, i, orderbook['asks'][0], orderbook['bids'][0])
           i += 1
       except Exception as e:
           print(str(e))
           # raise e  # uncomment to break all loops in case of an error in any one of them
           # break  # you can also break just this one loop if it fails


async def main():
   exchange = ccxt.pro.kraken()
   await exchange.load_markets()
   markets = list(exchange.markets.values())
   symbols = [market['symbol'] for market in markets if not market['darkpool']]
   await asyncio.gather(*[loop(exchange, symbol, n) for n, symbol in enumerate(symbols)])
   await exchange.close()



asyncio.run(main())