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Date: Tue, 24 Mar 2015 21:39:43 -0400
Subject: Re: Best way to calculate fraction part of x?
From: Jason Swails <jason.swails@gmail.com>
Cc: python list <python-list@python.org>
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Xref: csiph.com comp.lang.python:87916

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On Mon, Mar 23, 2015 at 8:38 PM, Emile van Sebille <emile@fenx.com> wrote:

> On 3/23/2015 5:52 AM, Steven D'Aprano wrote:
>
>  Are there any other, possibly better, ways to calculate the fractional
>> part
>> of a number?
>>
>
> float (("%6.3f" % x)[-4:])


=E2=80=8BIn general you lose a lot of precision this way...=E2=80=8B

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"color:#000000"><br><=
/div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Mar =
23, 2015 at 8:38 PM, Emile van Sebille <span dir=3D"ltr">&lt;<a href=3D"mai=
lto:emile@fenx.com" target=3D"_blank">emile@fenx.com</a>&gt;</span> wrote:<=
br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left=
:1px #ccc solid;padding-left:1ex"><span class=3D"">On 3/23/2015 5:52 AM, St=
even D&#39;Aprano wrote:<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Are there any other, possibly better, ways to calculate the fractional part=
<br>
of a number?<br>
</blockquote>
<br></span>
float ((&quot;%6.3f&quot; % x)[-4:])</blockquote><div><br></div><div><div c=
lass=3D"gmail_default" style=3D"color:rgb(0,0,0);display:inline">=E2=80=8BI=
n general you lose a lot of precision this way...=E2=80=8B</div></div></div=
>
</div></div>

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