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Pipeline Returning Unusable Securities
James Kerfoot
posted

Hello All,
I have just recently started to encounter a problem with the pipeline where the results it returns have no present data. For example, at the moment, I am running the pipeline and returning price and volume, screening for price between 1 and 100, and sorting by highest volume. Handle_data then checks the pervious day's price (same thing that the pipeline is returning) and the price at 8:31am via data.history. When I run my backtest, I almost immediately get this message:

         IOError: [Errno None] None: None  
         There was a runtime error on line 95.

Now when I run my code, the runtime error alternates between line 95 (previous day's price check) and line 97 (data.history current price check).

I'm okay with throwing out that security from the pipeline list, but I don't think this IOError is normal, and I don't know how to deal with it since it isn't a normal exception.

1 response
Jamie McCorriston

Hi James,

Without seeing any of the code, it's difficult to help troubleshoot this one. What makes you think it's tied to a particular security? Do you have a reproducible example that you could share? It doesn't necessarily have to be your full algo, just something that gives that error message.

Alternatively, you could email in to [email protected] for private help.

Jamie

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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.