[ python-Bugs-1088563 ] calculation wrong rounding
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Mon Dec 20 20:09:55 CET 2004
Bugs item #1088563, was opened at 2004-12-20 13:29
Message generated for change (Comment added) made by tim_one
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Category: Macintosh
>Group: Not a Bug
>Status: Closed
>Resolution: Invalid
Priority: 5
Submitted By: Sebastian Rockel (buzz42)
Assigned to: Jack Jansen (jackjansen)
Summary: calculation wrong rounding
Initial Comment:
I am using python 2.4 on MAC OS 10.3.7 with gcc V3.3 20030304
(Apple Computer, Inc. build 1666)
It is a simple calculation. There seems to be a little rounding
problem:
>>> 4053020.7+10*324241.6
7295436.7000000002
It shoult be of course 7295436.7
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>Comment By: Tim Peters (tim_one)
Date: 2004-12-20 14:09
Message:
Logged In: YES
user_id=31435
Please read the Appendix about floating-point issues in the
Python Tutorial -- what you're seeing is an unavoidable
consquence of using binary floating-point hardware. If you
require exact decimal representations, use the new
``decimal`` module intead.
----------------------------------------------------------------------
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