Mark Dickinson <dicki...@gmail.com> added the comment:

Fine by me in principle; I haven't had a chance to look at the code yet.

While we're doing this, any chance we could special-case the two-argument hypot 
to use the libm hypot directly? On many platforms the libm hypot will be 
correctly rounded, or close to it. There was a noticeable accuracy regression 
for two-argument hypot when hypot gained the ability to support multiple 
arguments.

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue41513>
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