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Wed Aug 29 18:05:19 CEST 2007 · https://mail.python.org/pipermail/python-dev/2007-August/074346.html

2007/8/29, dany <danzat at gmail.com>:
> For some reason, the integer division behaves unexpectedly for negative
> integers.
>
> Looking deeper in the python PEPs, I saw that division on integers is
> defined as: idiv(a, b) = floor(fdiv(a, b)).
> This non-quotient division leads to some odd results, e.g. Python seems
> to think -3/2+3/2 = -1. This is clearly, and correct me if I'm mistaken
> - wrong.

FAQ: Why does -22 / 10 return -3?

http://www.python.org/doc/faq/programming/#why-does-22-10-return-3

Past discussion:

<http://mail.python.org/pipermail/python-list/2005-February/thread.html#306577>

Also, FYI, TCL and Ruby behave the same way.

-- 
Lino Mastrodomenico
E-mail: l.mastrodomenico at gmail.com

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[Python-Dev] PEP 238 - The /