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From: Jussi Piitulainen <jussi.piitulainen@helsinki.fi>
Newsgroups: comp.lang.python
Subject: Re: sum accuracy
Date: Wed, 13 Apr 2016 19:57:26 +0300
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Robin Becker writes:

> Does anyone know if sum does anything special to try and improve
> accuracy? My simple tests seem to show it is exactly equivalent to a
> for loop summation.

You want math.fsum.