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Date: Fri, 24 Feb 2012 12:41:32 +0100
From: Antoon Pardon <antoon.pardon@rece.vub.ac.be>
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Subject: Re: sum() requires number, not simply __add__
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On 02/24/2012 12:33 AM, Steven D'Aprano wrote:
> If your application stops working after you carelessly mess with
> components your application relies on, the right answer is usually:
>
> "Don't do that then."
>
> Python doesn't try to prevent people from shooting themselves in the foot.
>    
Yes it does! A simple example is None as a keyword to prevent 
assignments to it.

-- 
Antoon Pardon