Every time I use the Zero Commission Algorithmic Trading - Robinhood & Quantopian, I get this. (I haven't altered anything)
AttributeError: 'NoneType' object has no attribute 'amount'
...
USER ALGORITHM:273, in open_new_positions
(get_order(o_id).amount, security.symbol))Maybe post your algorithm or at least more of the code. Not a lot to go on...
I assume you may be referring to an algorithm in this post https://www.quantopian.com/posts/zero-commission-algorithmic-trading-robinhood-and-quantopian (there are several algorithms). Take a look at the response by Seong Lee Feb 9, 2016 in that post. He addresses the same issue.
Should probably check that 'get_order(o_id)' is actually returning an order. If it's not then it returns nothing or 'NoneType' which doesn't have an attribute '.amount'. That is what the error seems to imply. Maybe just put in the code Seong suggests...
if get_order(o_id):
log.info("Ordering %s shares of %s" %
(get_order(o_id).amount, security.symbol))
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.