Async Theocean Tickers

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

import asyncio
import os
import sys


import ccxt.async_support as ccxt  # noqa: E402


def get_active_symbols(exchange):
   return [symbol for symbol in exchange.symbols if is_active_symbol(exchange, symbol)]


def is_active_symbol(exchange, symbol):
   return ('.' not in symbol) and (('active' not in exchange.markets[symbol]) or (exchange.markets[symbol]['active']))


async def fetch_ticker(exchange, symbol):
   ticker = await exchange.fetchTicker(symbol)
   print(exchange.id, symbol, ticker)
   return ticker


async def fetch_tickers(id):
   exchange = getattr(ccxt, id)()
   await exchange.load_markets()
   print(exchange.id, 'fetching all tickers by simultaneous multiple concurrent requests')
   symbols_to_load = get_active_symbols(exchange)
   input_coroutines = [fetch_ticker(exchange, symbol) for symbol in symbols_to_load]
   tickers = await asyncio.gather(*input_coroutines, return_exceptions=True)
   for ticker, symbol in zip(tickers, symbols_to_load):
       if not isinstance(ticker, dict):
           print(exchange.id, symbol, 'error')
       else:
           print(exchange.id, symbol, 'ok')
   print(exchange.id, 'fetched', len(list(tickers)), 'tickers')
   await exchange.close()


asyncio.run(fetch_tickers('theocean'))