[docs] Fwd: python calculate error

3 Feb 2017

      ---------- Forwarded message ----------
From: 琪 <13781136833@163.com>
Date: 2017-02-03 19:19 GMT+08:00
Subject: python calculate error
To: httese@gmail.com

I just test the version 2.7.10 and 3.5.2, on windows 7 SP1 x86, windows 7
SP1 x64 and linux debian amd64.
I hope can get the answer from you quickly, thanks.

18.35 - 9.35
9.000000000000002

18.35 - (12 - 2.65)
9.000000000000002