Research Env - Zipline symbols() Error - 'NoneType' object has no attribute 'symbols'

Quantopian's community platform is shutting down. Please read this post for more information and download your code.

Back to Community

Research Env - Zipline symbols() Error - 'NoneType' object has no attribute 'symbols'

posted Jun 17, 2016

API Seeking Help Research

No matter what I do I can't get 'symbol' or 'symbols' to be recognized. Could someone please tell me what I'm doing wrong?

from zipline.api import sid, symbol, symbols

stocks = symbols(['EDV','RSP','TLT','XIV'])


---------------------------------------------------------------------------  
AttributeError                            Traceback (most recent call last)  
<ipython-input-97-ad0f5a8353b0> in <module>()  
----> 1 stocks = symbols(['EDV','RSP','TLT','XIV'])  
      2 #zipline.api.symbols(['EDV','RSP','TLT','XIV'])

/build/src/qexec_repo/zipline_repo/zipline/utils/api_support.pyc in wrapped(*args, **kwargs)
     49     def wrapped(*args, **kwargs):  
     50         # Get the instance and call the method  
---> 51         return getattr(get_algo_instance(), f.__name__)(*args, **kwargs)  
     52     # Add functor to zipline.api  
     53     setattr(zipline.api, f.__name__, wrapped)

AttributeError: 'NoneType' object has no attribute 'symbols'

I have also tried many combinations of more direct references...

import zipline.api

stocks = zipline.api.symbols(['EDV','RSP','TLT','XIV'])


---------------------------------------------------------------------------  
AttributeError                            Traceback (most recent call last)  
<ipython-input-99-725d6eb0e10a> in <module>()  
      1 #stocks = symbols(['EDV','RSP','TLT','XIV'])  
----> 2 stocks = zipline.api.symbols(['EDV','RSP','TLT','XIV'])

/build/src/qexec_repo/zipline_repo/zipline/utils/api_support.pyc in wrapped(*args, **kwargs)
     49     def wrapped(*args, **kwargs):  
     50         # Get the instance and call the method  
---> 51         return getattr(get_algo_instance(), f.__name__)(*args, **kwargs)  
     52     # Add functor to zipline.api  
     53     setattr(zipline.api, f.__name__, wrapped)

AttributeError: 'NoneType' object has no attribute 'symbols'

Thanks in advanced!

2 responses

Hi Dylan,

The entire Zipline api module is automatically imported into the algorithms IDE. So you can remove that import line and things should work fine. However, symbols takes tickers as individual arguments instead of in a list, so this is the correct usage:

stocks = symbols('EDV','RSP','TLT','XIV')

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.

Thanks, Nathan. I do see that symbols() doesn't except a list and expects individual arguments and removing the import works. I saw other notebooks that imported it so I assumed it wasn't imported automatically. Maybe that was changed in some way since the notebook I saw was created.

Thanks again.

You've successfully submitted a support ticket.

Our support team will be in touch soon.

Need help? Contact support.

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.

About Quantopian

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.