Quantopian's community platform is shutting down. Please read this post for more information and download your code.
Back to Community
HELP: Eliminating Deprecated Code
Nicholas Forneris
edited
Seeking Help

Hi all,

New dabbler into python and algo trading and would appreciate some help if anyone is able.

I used an older code as a template, added my own criteria for buying and selling, and got everything to jive; however, I am having a lot of trouble converting the old set_universe to pipeline and also having trouble eliminating the the iteration over data issue in the code.

Can anyone steer me in the right direction or at least provide an example of what I am trying to do with set_universe with the new pipeline stuff? I have read all the pipeline tutorials and other posts about this, but am really struggling.

Any help would be appreciated, thanks!

3 responses
Josh Payne

Hi Nicholas,

Welcome. One resource you might find useful is this guide we wrote when we migrated the API: https://www.quantopian.com/quantopian2/

Thanks
Josh

Disclaimer

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.

Nicholas Forneris

I attempted to attach a pipeline in place of set_universe again ... however, now I receive the error "TypeError: Index does not support mutable operations" on line 68.

The way I understand how this is working is that I am calling context and data from 2 different functions further down in the code ... it worked prior to adding the pipeline, so I am not sure how I am breaking this.

def handle_data(context, data):  
    # Get's the stocks with the highest return at market open  
    market_open(context, data)  
    winning_stock = market_after_open(context, data)
Nicholas Forneris

I did end up getting this settled out ... most of the issues had to do with with how I was trying to access the pipeline output in a function down the line ...

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.