Quantopian's community platform is shutting down. Please read this post for more information and download your code.
Back to Community
JSONDecodeError while loading custom bundle data
Min Tu
posted

I have been using zipline in local development since March this year. I can load my custom data bundle till early June fine.

After I came back from a long trip, I found out the unit test failed with following error: 

Traceback (most recent call last):  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/unittest/case.py", line 59, in testPartExecutor  
    yield  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/unittest/case.py", line 605, in run  
    testMethod()  
  File "/Users/mintu/PycharmProjects/myZipline/myzipline/tests/testZigzagTrend_2014.py", line 138, in test_zigzag_trends_2014  
    bundle="ETF")  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/site-packages/zipline/utils/run_algo.py", line 430, in run_algorithm  
    blotter=blotter,  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/site-packages/zipline/utils/run_algo.py", line 159, in _run  
    trading_days=trading_calendar.schedule[start:end].index,  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/site-packages/zipline/finance/trading.py", line 103, in __init__  
    self.bm_symbol,  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/site-packages/zipline/data/loader.py", line 149, in load_market_data  
    environ,  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/site-packages/zipline/data/loader.py", line 216, in ensure_benchmark_data  
    data = get_benchmark_returns(symbol)  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/site-packages/zipline/data/benchmarks.py", line 35, in get_benchmark_returns  
    data = r.json()  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/site-packages/requests/models.py", line 897, in json  
    return complexjson.loads(self.text, **kwargs)  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/json/__init__.py", line 354, in loads  
    return _default_decoder.decode(s)  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/json/decoder.py", line 339, in decode  
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())  
  File "/Users/mintu/anaconda3/envs/q/lib/python3.6/json/decoder.py", line 357, in raw_decode  
    raise JSONDecodeError("Expecting value", s, err.value) from None  
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

after some debug, seems like the error come from loading 5 years ago data

    start = pd.Timestamp(datetime(2014, 6, 9, tzinfo=pytz.UTC))  
    end = pd.Timestamp(datetime(2014, 6, 10, tzinfo=pytz.UTC))

Any suggestions?

Thanks in advance

6 responses
Alan Coppola

@Min
SPY IEX data is gone...
Check out:
https://github.com/quantopian/zipline/issues/2480
for some fixes.
alan

MICHAEL BARD

tried all of the solutions on this page, didnt work for me.

cemal arican

any updates on this, i get similar problems. When i run an algorithm i get this:

/anaconda3/envs/backtestproject/bin/python3.5 /Users/cemalarican/Desktop/project/test.py Traceback (most recent call last):
File "/Users/cemalarican/Desktop/project/test.py", line 52, in
perf = run_algorithm(start, end, initialize, base_capital, handle_data)
File "/anaconda3/envs/backtestproject/lib/python3.5/site-packages/zipline/utils/run_algo.py", line 430, in run_algorithm
blotter=blotter,
File "/anaconda3/envs/backtestproject/lib/python3.5/site-packages/zipline/utils/run_algo.py", line 159, in run
trading_days=trading_calendar.schedule[start:end].index,
File "/anaconda3/envs/backtestproject/lib/python3.5/site-packages/zipline/finance/trading.py", line 103, in __init_
self.bm_symbol,
File "/anaconda3/envs/backtestproject/lib/python3.5/site-packages/zipline/data/loader.py", line 149, in load_market_data
environ,
File "/anaconda3/envs/backtestproject/lib/python3.5/site-packages/zipline/data/loader.py", line 216, in ensure_benchmark_data
data = get_benchmark_returns(symbol)
File "/anaconda3/envs/backtestproject/lib/python3.5/site-packages/zipline/data/benchmarks.py", line 35, in get_benchmark_returns
data = r.json()
File "/anaconda3/envs/backtestproject/lib/python3.5/site-packages/requests/models.py", line 896, in json
return complexjson.loads(self.text, **kwargs)
File "/anaconda3/envs/backtestproject/lib/python3.5/json/init.py", line 319, in loads
return _default_decoder.decode(s)
File "/anaconda3/envs/backtestproject/lib/python3.5/json/decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/anaconda3/envs/backtestproject/lib/python3.5/json/decoder.py", line 357, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

cemal arican

yes

Alan Coppola

@cemal,
The root cause is lack of working benchmark data...from your error up above: 

File "/anaconda3/envs/backtestproject/lib/python3.5/site-packages/zipline/data/benchmarks.py", line 35, in get_benchmark_returns  
data = r.json()

If you want to bypass the benchmark, do what it says here:
https://github.com/quantopian/zipline/issues/2480#issuecomment-502890521

alan

cemal arican

Hi Alan, it works. I guess I should have also tried that one. Again thank you. I have a couple more questions, what is included in this quantopian-bundle? Also would I have to buy a data set from quandl to get the same data as in the research notebooks? if so which ones? and how to link this dataset with my ide to create a pipeline?

Thank you so much,

Regards,

Cemal

About Quantopian
Careers
Community
Events
Documentation
Academia
Lectures
Status
Facebook
Twitter
LinkedIn
YouTube
Terms of Use
Privacy Policy

The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by Quantopian.

In addition, the material offers no opinion with respect to the suitability of any security or specific investment. No information contained herein should be regarded as a suggestion to engage in or refrain from any investment-related course of action as none of Quantopian nor any of its affiliates is undertaking to provide investment advice, act as an adviser to any plan or entity subject to the Employee Retirement Income Security Act of 1974, as amended, individual retirement account or individual retirement annuity, or give advice in a fiduciary capacity with respect to the materials presented herein. If you are an individual retirement or other investor, contact your financial advisor or other fiduciary unrelated to Quantopian about whether any given investment idea, strategy, product or service described herein may be appropriate for your circumstances. All investments involve risk, including loss of principal. Quantopian makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances.