client_session: <aiohttp.client.ClientSession object at 0x000001B7CD7F9B70>

[zhoujinhai]

I can get the ticker when I use the first code, but when I use async , the code run wrong, how to slove it ! can you help me? I am use python 3.6 on windows 10 .

the first code:

import ccxt
exchange = ccxt.binance()
symbol = 'BTC/USDT'
ticker = exchange.fetch_ticker(symbol)
print(ticker)

the sencond code:

import asyncio
import ccxt.async as ccxt

async def getticker():
    binance = ccxt.binance()
    print(await binance.fetch_ticker('BTC/USDT'))

asyncio.get_event_loop().run_until_complete(getticker())

Traceback (most recent call last):
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\ccxt\async\base\exchange.py", line 124, in fetch
    proxy=self.aiohttp_proxy) as response:
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\aiohttp\client.py", line 690, in __aenter__
    self._resp = yield from self._coro
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\aiohttp\client.py", line 341, in _request
    break
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\aiohttp\helpers.py", line 727, in __exit__
    raise asyncio.TimeoutError from None
concurrent.futures._base.TimeoutError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "E:/python3/test/test.py", line 10, in <module>
    asyncio.get_event_loop().run_until_complete(getticker())
  File "C:\Users\SXY004\Anaconda3\lib\asyncio\base_events.py", line 466, in run_until_complete
    return future.result()
  File "E:/python3/test/test.py", line 8, in getticker
    print(await binance.fetch_ticker('BTC/USDT'))
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\ccxt\async\binance.py", line 492, in fetch_ticker
    await self.load_markets()
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\ccxt\async\base\exchange.py", line 153, in load_markets
    markets = await self.fetch_markets()
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\ccxt\async\binance.py", line 345, in fetch_markets
    response = await self.publicGetExchangeInfo()
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\ccxt\async\base\exchange.py", line 102, in fetch2
    return await self.fetch(request['url'], request['method'], request['headers'], request['body'])
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\ccxt\async\base\exchange.py", line 139, in fetch
    self.raise_error(RequestTimeout, method, url, e, None)
  File "C:\Users\SXY004\Anaconda3\lib\site-packages\ccxt\base\exchange.py", line 274, in raise_error
    raise exception_type(output)
ccxt.base.errors.RequestTimeout: binance GET https://api.binance.com/api/v1/exchangeInfo 
binance requires to release all resources with an explicit call to the .close() coroutine.
Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x000001AE4AB39B00>

[frosty00]

You're running an old version of ccxt. Do a git pull or git clone and then run python3 setup.py or pip3

[zhoujinhai]

@frosty00 thanks！ I can run the second code yestoday， and I have pip install the ccxt , it still show the same mistake

[frosty00]

Try again, this has been fixed already. I litterally just ran the second code you posted. What is the output of ccxt.__version__

[zhoujinhai]

the version of ccxt is 1.11.45, it still can't work

[frosty00]

Oh sorry I didn't see the error log carefully

I was reading

Unclosed client session

instead of

ccxt.base.errors.RequestTimeout: binance GET https://api.binance.com/api/v1/exchangeInfo

strange that the garbage collection doesn't work properly on windows tho.

Anyhow this basically means that the problem is on binance's end, not ours. They have been having issues with api trading recently, checkout: https://np.reddit.com/r/CryptoCurrency/comments/82pf9i/warning_issues_on_binance/

[zhoujinhai]

thanks your help ! but i still have some problems?
1 when I try this exchange: 'huobipro' , 'bitflyer', 'bitfinex'... the code have show the same error!
Do I need to set proxy for this exchange?

2 I have try the exchange of 'bithumb', I can get the result and follow a warning:

[Jackzhangpan]

sync can do ,but ccxt.async can't work .huobipro ,oken,binance ,etc.. @kroitor

[kroitor]

@Jackzhangpan can you post your code and verbose output according to these rules: https://github.com/ccxt/ccxt/blob/master/CONTRIBUTING.md#how-to-submit-an-issue ?

[Jackzhangpan]

The problem is the same as the one upstairs。async can't be used today. include: binance, huobipro ,okex,.....

[cmosse]

I got this identical issue as updated CCXT to version 1.11.143. Ran the code in the first post:

File "C:/Users/Administrator/Desktop/code/maalis/testing.py", line 15, in
asyncio.get_event_loop().run_until_complete(getticker())

File "c:\python36\lib\asyncio\base_events.py", line 454, in run_until_complete
self.run_forever()

File "c:\python36\lib\asyncio\base_events.py", line 408, in run_forever
raise RuntimeError('This event loop is already running')

All my previously working async functions run into same issue

[frosty00]

Not the same error, this is problem with how you have implemented your coroutines

raise RuntimeError('This event loop is already running')

^This explains the error

Also when I run it I get:

import asyncio
import ccxt.async as ccxt
async def getticker():
    binance = ccxt.binance()
    print(await binance.fetch_ticker('BTC/USDT'))
asyncio.get_event_loop().run_until_complete(getticker())
{'symbol': 'BTC/USDT', 'timestamp': 1521565562224, 'datetime': '2018-03-20T17:06:02.224Z', 'high': 8833.81, 'low': 8230.7, 'bid': 8790.0, 'bidVolume': 0.526696, 'ask': 8790.13, 'askVolume': 9.1e-05, 'vwap': 8484.1899091, 'open': 8390.0, 'close': 8790.13, 'last': 8790.13, 'previousClose': 8380.2, 'change': 400.13, 'percentage': 4.769, 'average': None, 'baseVolume': 43217.528733, 'quoteVolume': 366665721.172899, 'info': {'symbol': 'BTCUSDT', 'priceChange': '400.13000000', 'priceChangePercent': '4.769', 'weightedAvgPrice': '8484.18990910', 'prevClosePrice': '8380.20000000', 'lastPrice': '8790.13000000', 'lastQty': '0.05335900', 'bidPrice': '8790.00000000', 'bidQty': '0.52669600', 'askPrice': '8790.13000000', 'askQty': '0.00009100', 'openPrice': '8390.00000000', 'highPrice': '8833.81000000', 'lowPrice': '8230.70000000', 'volume': '43217.52873300', 'quoteVolume': '366665721.17289903', 'openTime': 1521479162224, 'closeTime': 1521565562224, 'firstId': 28912704, 'lastId': 29202546, 'count': 289843}}

[cmosse]

I meant that I also end up in an error running the async version of the first post, the same you copy-pasted.
In my humble opinion, that really doesn't explain the error in any way.
The fact that you are able to run the code, also doesn't really clarify anything.