Message 188033 - Python tracker

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Author	squeakbat
Recipients	squeakbat
Date	2013-04-29.03:29:25
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1367206166.88.0.195054463405.issue17865@psf.upfronthosting.co.za>
In-reply-to

Content
This is only on a PowerPC, specifically a p2020, running Debian 7.0 wheezy, python 2.7.3. Calling round() seems to corrupt something (in the floating point state?) that causes subsequent exponentiation (the operator) to be wrong: Python 2.7.3 (default, Jan 2 2013, 16:38:11) [GCC 4.6.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> 2 -2 0.25 >>> round(1) 1.0 >>> 2 ** -2 0.1253019036571362 Cool. Huh?

This is only on a PowerPC, specifically a p2020, running Debian 7.0 wheezy, python 2.7.3.

Calling round() seems to corrupt something (in the floating point state?) that causes subsequent exponentiation (the ** operator) to be wrong:

Python 2.7.3 (default, Jan  2 2013, 16:38:11)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 2 ** -2
0.25
>>> round(1)
1.0
>>> 2 ** -2
0.1253019036571362

Cool.  Huh?

History
Date	User	Action	Args
2013-04-29 03:29:26	squeakbat	set	recipients: + squeakbat
2013-04-29 03:29:26	squeakbat	set	messageid: <1367206166.88.0.195054463405.issue17865@psf.upfronthosting.co.za>
2013-04-29 03:29:26	squeakbat	link	issue17865 messages
2013-04-29 03:29:26	squeakbat	create