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On 02.07.2015 19:29, Jason Swails wrote:
// maths.h #include math.h #include stdio.h
int main() { double x; int i; x = 1-pow(0.5, 53);
for (i = 1; i 100; i++) { if ((int)(i*x) == i) {
printf(%d\n, i); break; } }
return 0; }
Does
On Mon, Jul 6, 2015 at 11:44 AM, Oscar Benjamin oscar.j.benja...@gmail.com
wrote:
On Sat, 4 Jul 2015 at 02:12 Jason Swails jason.swa...@gmail.com wrote:
On Fri, Jul 3, 2015 at 11:13 AM, Oscar Benjamin
oscar.j.benja...@gmail.com wrote:
On 2 July 2015 at 18:29, Jason Swails
On Sat, 4 Jul 2015 at 02:12 Jason Swails jason.swa...@gmail.com wrote:
On Fri, Jul 3, 2015 at 11:13 AM, Oscar Benjamin
oscar.j.benja...@gmail.com wrote:
On 2 July 2015 at 18:29, Jason Swails jason.swa...@gmail.com wrote:
Where is the 32 bit one looks like:
$ objdump -d a.out.32 | less
Laura Creighton wrote:
In a message of Fri, 03 Jul 2015 00:52:55 +1000, Steven D'Aprano writes:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version
of Python and your operating system.
In a message of Fri, 03 Jul 2015 00:52:55 +1000, Steven D'Aprano writes:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version of
Python and your operating system. Printing sys.version will
On 2 July 2015 at 18:29, Jason Swails jason.swa...@gmail.com wrote:
As others have suggested, this is almost certainly a 32-bit vs. 64-bit
issue. Consider the following C program:
// maths.h
#include math.h
#include stdio.h
int main() {
double x;
int i;
x = 1-pow(0.5, 53);
On 3-7-2015 7:07, Ned Deily wrote:
In article 559579bb$0$2921$e4fe5...@news.xs4all.nl,
Irmen de Jong irmen.nos...@xs4all.nl wrote:
Tested on Mac OSX 10.10.4, with a 64-bit core2duo processor. Below are all
64-bit python
implementations:
2.6.9 (apple supplied), 2.7.6 (apple supplied), 3.4.3
On Fri, Jul 3, 2015 at 11:13 AM, Oscar Benjamin oscar.j.benja...@gmail.com
wrote:
On 2 July 2015 at 18:29, Jason Swails jason.swa...@gmail.com wrote:
As others have suggested, this is almost certainly a 32-bit vs. 64-bit
issue. Consider the following C program:
// maths.h
#include
The loop runs to completion for me on openSUSE Tumbleweed and both Python
2.7 64bits and Python 3.4 64bits.
On Thu, Jul 2, 2015 at 4:52 PM, Steven D'Aprano st...@pearwood.info wrote:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce
On 02/07/2015 15:52, Steven D'Aprano wrote:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version of
Python and your operating system. Printing sys.version will probably do.
x = 1 -
Steven D'Aprano st...@pearwood.info writes:
x = 1 - 1/2**53
assert x == 0.
In Python 2.x I don't see how that assert can possibly succeed, since
x is the integer 1. But I tested it anyway on 2.7.5 under Fedora 19
and it threw an assertion error.
I changed it to say 1 -
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version of
Python and your operating system. Printing sys.version will probably do.
x = 1 - 1/2**53
assert x == 0.
for i in
On Fri, Jul 3, 2015 at 1:26 AM, Paul Rubin no.email@nospam.invalid wrote:
Steven D'Aprano st...@pearwood.info writes:
x = 1 - 1/2**53
assert x == 0.
In Python 2.x I don't see how that assert can possibly succeed, since
x is the integer 1. But I tested it anyway on 2.7.5
On Thu, Jul 2, 2015 at 9:26 AM, Paul Rubin no.email@nospam.invalid wrote:
Steven D'Aprano st...@pearwood.info writes:
x = 1 - 1/2**53
assert x == 0.
In Python 2.x I don't see how that assert can possibly succeed, since
x is the integer 1. But I tested it anyway on 2.7.5
On Thu, Jul 2, 2015 at 5:29 PM, Robin Becker ro...@reportlab.com wrote:
$ uname -a
Linux everest 4.0.6-1-ARCH #1 SMP PREEMPT Tue Jun 23 14:40:31 CEST 2015
i686 GNU/Linux
I am wondering if this is a 32bit vs. 64bit thing. Has anyone gotten this
problem to work on a 64bit python?
--
$ uname -a
Linux everest 4.0.6-1-ARCH #1 SMP PREEMPT Tue Jun 23 14:40:31 CEST 2015 i686
GNU/Linux
robin@everest:~
$ python2
Python 2.7.10 (default, May 26 2015, 04:28:58)
[GCC 5.1.0] on linux2
Type help, copyright, credits or license for more information.
x = 1.0 - 1.0/2**53
assert x ==
On my Chromebook, using Python 2.7.6 from the Ubuntu Trusty
distribution, I get AssertionError, and x == 1.
In Python 3.4.0 on the same system, the code runs to completion. Both
Pythons appear to be 64-bit builds.
On my Mint 17.1 desktop (which should be using the same packages), I
get the same
On Fri, 3 Jul 2015 01:34 am, Chris Angelico wrote:
From previous discussions I happen to know that Steven normally runs
everything with from __future__ import division active (and possibly
others? not sure), so just assume he means to work with floats here.
Steven, I think this is one of the
hi Steven,
I'm running python-3.4.2 on a linuxmint16 box and CANNOT reproduce
it is just that
int(i*x) == i
is never True!
hope that helps
regards
Michael
* Steven D'Aprano st...@pearwood.info [2015-07-02 16:56]:
Despite the title, this is not one of the usual Why can't Python do
maths? bug
On Fri, Jul 3, 2015 at 12:52 AM, Steven D'Aprano st...@pearwood.info wrote:
Can anyone reproduce this behaviour? If so, please reply with the version of
Python and your operating system. Printing sys.version will probably do.
x = 1 - 1/2**53
assert x == 0.
for i in range(1,
On Fri, 3 Jul 2015 12:52 am, Steven D'Aprano wrote:
x = 1 - 1/2**53
Ooops, sorry I forgot that I had already run from __future__ import
division. Otherwise that line needs to be:
x = 1 - 1.0/2**53
--
Steven
--
https://mail.python.org/mailman/listinfo/python-list
Le 02/07/2015 16:52, Steven D'Aprano a écrit :
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version of
Python and your operating system. Printing sys.version will probably do.
x = 1 -
On Thu, Jul 2, 2015 at 9:28 AM, Ian Kelly ian.g.ke...@gmail.com wrote:
On my Chromebook, using Python 2.7.6 from the Ubuntu Trusty
distribution, I get AssertionError, and x == 1.
In Python 3.4.0 on the same system, the code runs to completion. Both
Pythons appear to be 64-bit builds.
On my
In article 559579bb$0$2921$e4fe5...@news.xs4all.nl,
Irmen de Jong irmen.nos...@xs4all.nl wrote:
Tested on Mac OSX 10.10.4, with a 64-bit core2duo processor. Below are all
64-bit python
implementations:
2.6.9 (apple supplied), 2.7.6 (apple supplied), 3.4.3 (homebrew), and
pypy-2.6.0
On 02/07/15 15:52, Steven D'Aprano wrote:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version of
Python and your operating system. Printing sys.version will probably do.
x = 1 -
On Thu, Jul 2, 2015 at 10:52 AM, Steven D'Aprano st...@pearwood.info
wrote:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version
of
Python and your operating system. Printing
On 2-7-2015 16:52, Steven D'Aprano wrote:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version of
Python and your operating system. Printing sys.version will probably do.
x = 1 -
On 2015-07-02 15:52, Steven D'Aprano wrote:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version of
Python and your operating system. Printing sys.version will probably do.
x = 1 -
On 2015-07-03 00:52, Steven D'Aprano wrote:
x = 1 - 1/2**53
assert x == 0.
for i in range(1, 100):
if int(i*x) == i:
print(i); break
tkc@debian:~$ python
Python 2.7.9 (default, Mar 1 2015, 12:57:24)
[GCC 4.9.2] on linux2
Type help, copyright, credits or
Steven D'Aprano wrote:
Despite the title, this is not one of the usual Why can't Python do
maths? bug reports.
Can anyone reproduce this behaviour? If so, please reply with the version
of Python and your operating system. Printing sys.version will probably
do.
zip
On Kubuntu 15.04, it
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