KeyError: 'T' in ccxt.bittrex in parse_ohlcv

[stonemonk]

Calling bittrex_service.fetch_ohlcv("CANN/BTC", "1m") raised KeyError on line:

timestamp = self.parse8601(ohlcv['T'])

where:

{
'Ask': 0.00004935, 
'BaseVolume': 112.58089677, 
'Bid': 0.00004861, 
'Created': '2017-06-06T01:22:35.727', 
'High': 0.00005269, 
'Last': 0.00004854, 
'Low': 0.00004251, 
'MarketName': 'BTC-1ST', 
'OpenBuyOrders': 242, 
'OpenSellOrders': 5837, 
'PrevDay': 0.0000456, 
'TimeStamp': '2017-11-09T11:58:32.357', 
'Volume': 2370437.89533223
}

Note that MarketName is not the same as what was requested. The market dictionary OTOH, does reflect the correct market.

[kroitor]

Thanks for reporting this, will take a look into it and get back to you.

[kroitor]

That's very strange... can't reproduce it on my side...

mbp:python igorkroitor$ python
Python 2.7.13 (default, Jun  5 2017, 10:04:07) 
[GCC 4.2.1 Compatible Apple LLVM 8.1.0 (clang-802.0.42)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import ccxt
>>> ccxt.bittrex().fetch_ohlcv('CANN/BTC', '1m')
[[1509373020000, 4e-06, 4e-06, 4e-06, 4e-06, 312.15402796], [1509373200000, 4e-06, 4.01e-06, 4e-06, 4.01e-06, 1147.69849854], [1509373320000, 4.01e-06, 4.01e-06, 4.01e-06, 4.01e-06, 256.32578615], [1509373500000, 4e-06, 4e-06, 4e-06, 4e-06, 5000.0], [1509373560000, 4e-06, 4e-06, 4e-06, 4e-06, 5000.0], [1509374040000, 4e-06, 4e-06, 4e-06, 4e-06, 574.7400873], [1509374100000, 4e-06, 4e-06, 4e-06, 4e-06, 3102.41075935], [1509374160000, 4.01e-06, 4.01e-06, 4e-06, 4e-06, 305.96590909], [1509374400000, 4.01e-06, 4.07e-06, 4.01e-06, 4.07e-06, 1161.74967859], [1509374520000, 4.07e-06, 4.07e-06, 4.07e-06, 4.07e-06, 2.34457914], [1509374640000, 4.07e-06, 4.07e-06, 4.07e-06, 4.07e-06, 200.0], [1509375000000, 4.07e-06, 4.07e-06, 4.07e-06, 4.07e-06, 198.770513], [1509375120000, 4.06e-06, 4.06e-06, 4.06e-06, 4.0

Can you show your full code and full output in verbose mode (set .verbose=True on the exchange instance or add {'verbose':True} to constructor)?

[stonemonk]

I only saw it once and also haven't been able to reproduce again. I was basically calling that periodically in a loop for data collection, and it just popped up randomly. I'll run in verbose and in a debugger and see if I can catch it again (and debug)..

[kroitor]

@stonemonk you might be hitting their rate limit if you do it more frequently than once per second, so, you might want to set .enableRateLimit = True or add {'enableRateLimit': True, 'verbose': True} to the constructor.

[kroitor]

I would close this for now, if you don't mind, until we have further development on this issue. Feel free to reopen it or just continue posting if you experience problems with after setting a delay on bittrex. Thx!