For details, see:
PEP 0485 -- A Function for testing approximate equality
Functions added: math.isclose() and cmath.isclose().
Original code by Chris Barker. Patch by Tal Einat.
the file descriptor of a pipe closed in the parent process is valid in the
child process according to fstat(), but the mode of the file descriptor is
invalid, and read or write raise an error.
test.support.requires_mac_ver() is now a decorator, as suggested by Ezio
Melotti, and its docstring is fixed (linux_version => mac_ver).
svn+ssh://pythondev@svn.python.org/python/trunk
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r81967 | mark.dickinson | 2010-06-13 11:50:29 +0100 (Sun, 13 Jun 2010) | 4 lines
Issue #8986: erfc was raising OverflowError on Linux for arguments in
the (approximate) range (-27.3, 30.0), as a result of an escaped errno
value.
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(1) use a different algorithm that roughly halves the total number of
multiplications required and results in more balanced multiplications
(2) use a lookup table for small arguments
(3) fast accumulation of products in C integer arithmetic rather than
PyLong arithmetic when possible.
Typical speedup, from unscientific testing on a 64-bit laptop, is 4.5x
to 6.5x for arguments in the range 100 - 10000.
Patch by Daniel Stutzbach; extensive reviews by Alexander Belopolsky.
svn+ssh://pythondev@svn.python.org/python/trunk
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r78041 | mark.dickinson | 2010-02-06 23:11:25 +0000 (Sat, 06 Feb 2010) | 1 line
testCopysign was defined twice in test_math; combine the definitions
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svn+ssh://pythondev@svn.python.org/python/trunk
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r76861 | mark.dickinson | 2009-12-16 20:13:40 +0000 (Wed, 16 Dec 2009) | 3 lines
Issue #3366: Add expm1 function to math module. Thanks Eric Smith for
testing on Windows.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r75454 | mark.dickinson | 2009-10-17 08:06:37 +0100 (Sat, 17 Oct 2009) | 1 line
test_math ulp computation was wrong on big-endian systems
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svn+ssh://pythondev@svn.python.org/python/trunk
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r71837 | mark.dickinson | 2009-04-24 17:34:14 +0100 (Fri, 24 Apr 2009) | 4 lines
Issue #5593: Use more robust test for double-rounding in test_fsum.
While we're at it, use new unittest.skipUnless decorator to
implement skipping for that test.
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r71838 | mark.dickinson | 2009-04-24 17:37:22 +0100 (Fri, 24 Apr 2009) | 2 lines
Remove unnecessary double negative
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svn+ssh://pythondev@svn.python.org/python/trunk
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r65258 | mark.dickinson | 2008-07-27 08:15:29 +0100 (Sun, 27 Jul 2008) | 4 lines
Remove math.sum tests related to overflow, special values, and behaviour
near the extremes of the floating-point range. (The behaviour of math.sum
should be regarded as undefined in these cases.)
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r65292 | mark.dickinson | 2008-07-29 19:45:38 +0100 (Tue, 29 Jul 2008) | 4 lines
More modifications to tests for math.sum: replace the Python
version of msum by a version using a different algorithm, and
use the new float.fromhex method to specify test results exactly.
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r65299 | mark.dickinson | 2008-07-30 13:01:41 +0100 (Wed, 30 Jul 2008) | 5 lines
Fix special-value handling for math.sum.
Also minor cleanups to the code: fix tabbing, remove
trailing whitespace, and reformat to fit into 80
columns.
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r65308 | mark.dickinson | 2008-07-30 17:20:10 +0100 (Wed, 30 Jul 2008) | 2 lines
Rename math.sum to math.fsum
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r65309 | mark.dickinson | 2008-07-30 17:25:16 +0100 (Wed, 30 Jul 2008) | 3 lines
Replace math.sum with math.fsum in a couple of comments
that were missed by r65308
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r65315 | mark.dickinson | 2008-07-30 21:23:15 +0100 (Wed, 30 Jul 2008) | 2 lines
Add note about problems with math.fsum on x86 hardware.
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r65326 | mark.dickinson | 2008-07-31 15:48:32 +0100 (Thu, 31 Jul 2008) | 2 lines
Rename testSum to testFsum and move it to proper place in test_math.py
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svn+ssh://pythondev@svn.python.org/python/trunk
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r63562 | martin.v.loewis | 2008-05-23 17:06:50 +0200 (Fri, 23 May 2008) | 2 lines
Patch #1722225: Support QNX 6.
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r63570 | trent.nelson | 2008-05-23 22:33:14 +0200 (Fri, 23 May 2008) | 1 line
Introduce a user macro named $(externalsDir), which should point to the root directory of where all the external sources should live. Developers can change this value if their external sources live elsewhere. The default of '..\..' matches the current status quo.
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r63728 | gregory.p.smith | 2008-05-26 23:16:34 +0200 (Mon, 26 May 2008) | 4 lines
Fix issue2589: there was a potential integer overflow leading to
memory corruption on esoteric platforms and incorrect behavior on
normal platforms.
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r63734 | gregory.p.smith | 2008-05-27 00:07:28 +0200 (Tue, 27 May 2008) | 3 lines
Fix issue2588: Do not execute str[size-1] = '\0' when a 0 size is
passed in. (The assert won't prevent this in non-debug builds).
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r63784 | raymond.hettinger | 2008-05-29 10:38:23 +0200 (Thu, 29 May 2008) | 1 line
Fix two typos.
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r63788 | facundo.batista | 2008-05-29 18:39:26 +0200 (Thu, 29 May 2008) | 6 lines
Fixed the semantic of timeout for socket.create_connection and
all the upper level libraries that use it, including urllib2.
Added and fixed some tests, and changed docs correspondingly.
Thanks to John J Lee for the patch and the pusing, :)
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r63802 | mark.dickinson | 2008-05-30 04:46:53 +0200 (Fri, 30 May 2008) | 2 lines
Fix typo in testSum
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r63817 | raymond.hettinger | 2008-05-30 20:20:50 +0200 (Fri, 30 May 2008) | 8 lines
* Mark intermedidate computes values (hi, lo, yr) as volatile.
* Expand comments.
* Swap variable names in the sum_exact code so that x and y
are consistently chosen as the larger and smaller magnitude
values respectively.
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r63827 | raymond.hettinger | 2008-05-31 05:24:31 +0200 (Sat, 31 May 2008) | 1 line
Implement heapq in terms of less-than (to match list.sort()).
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r63839 | gerhard.haering | 2008-05-31 23:33:27 +0200 (Sat, 31 May 2008) | 2 lines
Fixed rowcount for SELECT statements. They're -1 now (again), for better DB-API 2.0 compliance.
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r63887 | gregory.p.smith | 2008-06-02 06:05:52 +0200 (Mon, 02 Jun 2008) | 4 lines
Fix issue 2782: be less strict about the format string type in strftime.
Accept unicode and anything else ParseTuple "s#" can deal with. This
matches the time.strftime behavior.
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r63975 | neal.norwitz | 2008-06-06 06:47:01 +0200 (Fri, 06 Jun 2008) | 3 lines
Aldo Cortesi confirmed this is still needed for OpenBSD 4.2 and 4.3.
(I didn't regen configure, since I don't have a working autoconf.)
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r63998 | raymond.hettinger | 2008-06-06 23:47:51 +0200 (Fri, 06 Jun 2008) | 1 line
Issue 3501: Make heapq support both __le__ and __lt__.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r63542 | mark.dickinson | 2008-05-22 20:35:30 -0500 (Thu, 22 May 2008) | 5 lines
Issue #2819: Add math.sum, a function that sums a sequence of floats
efficiently but with no intermediate loss of precision. Based on
Raymond Hettinger's ASPN recipe. Thanks Jean Brouwers for the patch.
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r63543 | mark.dickinson | 2008-05-22 21:36:48 -0500 (Thu, 22 May 2008) | 2 lines
Add tests for math.sum (Issue #2819)
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r63544 | mark.dickinson | 2008-05-22 22:30:01 -0500 (Thu, 22 May 2008) | 2 lines
Better error reporting in test_math.py
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r63546 | raymond.hettinger | 2008-05-22 23:32:43 -0500 (Thu, 22 May 2008) | 1 line
Tweak the comments and formatting.
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r63553 | mark.dickinson | 2008-05-23 07:07:36 -0500 (Fri, 23 May 2008) | 3 lines
Skip math.sum tests on non IEEE 754 platforms, and on IEEE 754 platforms
that exhibit the problem described in issue #2937.
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r63563 | martin.v.loewis | 2008-05-23 10:18:28 -0500 (Fri, 23 May 2008) | 3 lines
Issue #1390: Raise ValueError in toxml when an invalid comment would
otherwise be produced.
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r63564 | raymond.hettinger | 2008-05-23 12:21:44 -0500 (Fri, 23 May 2008) | 1 line
Issue 2909: show how to name unpacked fields.
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r63567 | raymond.hettinger | 2008-05-23 12:34:34 -0500 (Fri, 23 May 2008) | 1 line
Fix typo
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r63569 | martin.v.loewis | 2008-05-23 14:33:13 -0500 (Fri, 23 May 2008) | 3 lines
Mention that the leaking of variables from list comprehensions
is fixed in 3.0.
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r63576 | martin.v.loewis | 2008-05-24 04:36:45 -0500 (Sat, 24 May 2008) | 3 lines
Don't try to get the window size if it was never set before.
Fixes the test failure on Solaris.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r62914 | skip.montanaro | 2008-05-08 20:45:00 -0400 (Thu, 08 May 2008) | 4 lines
Add an example about using NamedTemporaryFile() to replace mktemp(). I'm
unclear whether the verbatim text should have been indented or by how much.
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r62915 | benjamin.peterson | 2008-05-08 20:50:40 -0400 (Thu, 08 May 2008) | 2 lines
reindent example
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r62927 | georg.brandl | 2008-05-09 02:09:25 -0400 (Fri, 09 May 2008) | 2 lines
#2788: add .hgignore file.
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r62928 | georg.brandl | 2008-05-09 02:10:43 -0400 (Fri, 09 May 2008) | 2 lines
#2781: fix function name.
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r62929 | georg.brandl | 2008-05-09 02:18:27 -0400 (Fri, 09 May 2008) | 2 lines
Add a sentence to basicConfig() that is in the docstring.
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r62930 | georg.brandl | 2008-05-09 02:26:54 -0400 (Fri, 09 May 2008) | 2 lines
Add another link to colorsys docs.
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r62931 | georg.brandl | 2008-05-09 02:36:07 -0400 (Fri, 09 May 2008) | 2 lines
Add Kodos as a re reference.
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r62932 | georg.brandl | 2008-05-09 02:39:58 -0400 (Fri, 09 May 2008) | 2 lines
Add a note about using reload().
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r62933 | andrew.kuchling | 2008-05-09 07:46:05 -0400 (Fri, 09 May 2008) | 3 lines
Update planned release date.
Uncomment PEP 370 section.
Add some module items
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r62934 | christian.heimes | 2008-05-09 08:19:09 -0400 (Fri, 09 May 2008) | 1 line
Add --user option to build_ext
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r62948 | mark.dickinson | 2008-05-09 13:54:23 -0400 (Fri, 09 May 2008) | 3 lines
Issue #2487. math.ldexp(x, n) raised OverflowError when n was large and
negative; fix to return an (appropriately signed) zero instead.
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r62949 | martin.v.loewis | 2008-05-09 14:21:55 -0400 (Fri, 09 May 2008) | 1 line
Use the CHM file name that Sphinx assigns.
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particular, the error message now allows one to distinguish between a
ValueError arising from a singularity (e.g. log(0.)), which would
usually produce +-infinity in non-stop mode, and a ValueError resulting
from an invalid input (e.g. sqrt(-1.)), which would normally produce a
NaN in non-stop mode.
svn+ssh://pythondev@svn.python.org/python/trunk
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r62420 | mark.dickinson | 2008-04-20 20:30:05 +0200 (Sun, 20 Apr 2008) | 3 lines
Even more fixes for alpha Tru64, this time for
the phase and polar methods.
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r62421 | mark.dickinson | 2008-04-20 22:38:48 +0200 (Sun, 20 Apr 2008) | 2 lines
Add test for tanh(-0.) == -0. on IEEE 754 systems
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r62423 | amaury.forgeotdarc | 2008-04-20 23:02:21 +0200 (Sun, 20 Apr 2008) | 3 lines
Correct an apparent refleak in test_pkgutil: zipimport._zip_directory_cache contains
info for all processed zip files, even when they are no longer used.
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r62424 | mark.dickinson | 2008-04-20 23:39:04 +0200 (Sun, 20 Apr 2008) | 4 lines
math.atan2 is misbehaving on Windows; this patch
should fix the problem in the same way that
the cmath.phase problems were fixed.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r62380 | christian.heimes | 2008-04-19 01:13:07 +0200 (Sat, 19 Apr 2008) | 3 lines
I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
The patch also adds acosh, asinh, atanh, log1p and copysign to all platforms. Finally it fixes differences between platforms like different results or exceptions for edge cases. Have fun :)
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r62382 | christian.heimes | 2008-04-19 01:40:40 +0200 (Sat, 19 Apr 2008) | 2 lines
Added new files to Windows project files
More Windows related fixes are coming soon
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r62383 | christian.heimes | 2008-04-19 01:49:11 +0200 (Sat, 19 Apr 2008) | 1 line
Stupid me. Py_RETURN_NAN should actually return something ...
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svn+ssh://pythondev@svn.python.org/python/trunk
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r60482 | raymond.hettinger | 2008-01-31 23:07:16 +0100 (Thu, 31 Jan 2008) | 1 line
Minor wordsmithing on docstring
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r60483 | mark.dickinson | 2008-01-31 23:17:37 +0100 (Thu, 31 Jan 2008) | 5 lines
Issue #1678380. Fix a bug that identifies 0j and -0j when they appear
in the same code unit. The fix is essentially the same as the fix for a
previous bug identifying 0. and -0.
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r60484 | christian.heimes | 2008-02-01 00:08:23 +0100 (Fri, 01 Feb 2008) | 1 line
Fixed bug #1983: Return from fork() is pid_t, not int
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r60486 | jeffrey.yasskin | 2008-02-01 07:22:46 +0100 (Fri, 01 Feb 2008) | 4 lines
Move __builtins__.trunc() to math.trunc() per
http://mail.python.org/pipermail/python-dev/2008-January/076626.html and issue
1965.
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r60487 | jeffrey.yasskin | 2008-02-01 08:05:46 +0100 (Fri, 01 Feb 2008) | 3 lines
Roll back r60248. It's useful to encourage users not to change Rational
instances.
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r60488 | neal.norwitz | 2008-02-01 08:22:59 +0100 (Fri, 01 Feb 2008) | 1 line
Fix refleak
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svn+ssh://pythondev@svn.python.org/python/trunk
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r59666 | christian.heimes | 2008-01-02 19:28:32 +0100 (Wed, 02 Jan 2008) | 1 line
Made vs9to8 Unix compatible
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r59669 | guido.van.rossum | 2008-01-02 20:00:46 +0100 (Wed, 02 Jan 2008) | 2 lines
Patch #1696. Don't attempt to close None in dry-run mode.
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r59671 | jeffrey.yasskin | 2008-01-03 03:21:52 +0100 (Thu, 03 Jan 2008) | 6 lines
Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
the complex_pow part), r56649, r56652, r56715, r57296, r57302, r57359, r57361,
r57372, r57738, r57739, r58017, r58039, r58040, and r59390, and new
documentation. The only significant difference is that round(x) returns a float
to preserve backward-compatibility. See http://bugs.python.org/issue1689.
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r59672 | christian.heimes | 2008-01-03 16:41:30 +0100 (Thu, 03 Jan 2008) | 1 line
Issue #1726: Remove Python/atof.c from PCBuild/pythoncore.vcproj
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r59675 | guido.van.rossum | 2008-01-03 20:12:44 +0100 (Thu, 03 Jan 2008) | 4 lines
Issue #1700, reported by Nguyen Quan Son, fix by Fredruk Lundh:
Regular Expression inline flags not handled correctly for some unicode
characters. (Forward port from 2.5.2.)
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r59676 | christian.heimes | 2008-01-03 21:23:15 +0100 (Thu, 03 Jan 2008) | 1 line
Added math.isinf() and math.isnan()
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r59677 | christian.heimes | 2008-01-03 22:14:48 +0100 (Thu, 03 Jan 2008) | 1 line
Some build bots don't compile mathmodule. There is an issue with the long definition of pi and euler
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r59678 | christian.heimes | 2008-01-03 23:16:32 +0100 (Thu, 03 Jan 2008) | 2 lines
Modified PyImport_Import and PyImport_ImportModule to always use absolute imports by calling __import__ with an explicit level of 0
Added a new API function PyImport_ImportModuleNoBlock. It solves the problem with dead locks when mixing threads and imports
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r59679 | christian.heimes | 2008-01-03 23:32:26 +0100 (Thu, 03 Jan 2008) | 1 line
Added copysign(x, y) function to the math module
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Tal Einat
Serhiy Storchaka
Mark Dickinson
Victor Stinner
Mark Dickinson
Ezio Melotti
Eric Smith
Benjamin Peterson
Georg Brandl
Alexandre Vassalotti
Christian Heimes
Jeffrey Yasskin