jvdias jason.vas.d...@gmail.com added the comment:
To Build:
$ gcc -fPIC -shared -o psempy.c psempy.so -I/usr/include/python2.6
-L/usr/lib/python2.6 -lpython2.6 mv psempy.so psem.so
$ dd if=/dev/urandom of=app1_20090407.01.log bs=100 count=1
$ python
import sys, os, re, datetime, psem,
Changes by jvdias jason.vas.d...@gmail.com:
Removed file: http://bugs.python.org/file13656/psem_example.py
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jvdias jason.vas.d...@gmail.com added the comment:
Example Python use of psem.so Parallel ForEach : Log Compressor
Usage:
$ gcc -o psem.so -fPIC -shared psempy.c -I/usr/include/python2.6
-L/usr/lib/python2.6 -lpython2.6
$ dd if=/dev/urandom bs=100 count=1 of=app1_20090407.01.log
$ python
Julian Scheid julian...@gmail.com added the comment:
The same issue is present in 2.4 and 2.5 as well as 3.0 so I'm updating
this issue accordingly (haven't tried 2.7 or 3.1). I've been working
around this issue with some success and will be posting patches shortly.
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nosy: +julians37
jvdias jason.vas.d...@gmail.com added the comment:
$ time /usr/bin/python2.6 ./psem_example.py 21 | tee log
Do you really want to run test using 16 1MB log files ? Y/Ny
generating files 0..15
generating file 0
generating file 1
generating file 2
generating file 3
generating file 4
generating
Julian Scheid julian...@gmail.com added the comment:
Actually this seems to be fixed in 3.0.1 - yay!
--
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Julian Scheid julian...@gmail.com added the comment:
Attached a fix for release26-maint branch.
I've tested this as follows:
./configure --enable-toolbox-glue --enable-universalsdk
--enable-framework=/tmp/python-2.6-maint-install/Library/Framework
--prefix=/tmp/python-2.6-maint-install make
Larry Hastings la...@hastings.org added the comment:
The analysis I wrote on 2009/4/6 is correct, but I just discovered
another important detail: it only happens on my ZFS partition. I'm
using ZFS on Linux, via FUSE. No wonder I'm the only person it's
happening to! I don't know whether it's
Larry Hastings la...@hastings.org added the comment:
I should be more specific: patch was written against py3k/trunk r71404.
Though I imagine a very similar patch could be written for 2.7 (or 2.6
if appropriate).
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Ronald Oussoren ronaldousso...@mac.com added the comment:
Julian: patches for 2.4 and 2.5 will not be accepted, both releases are in
critical security fixes only mode.
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Julian Scheid julian...@gmail.com added the comment:
I had a hunch that might be the case. I'm still planning to upload them
here for the benefit of others who, like me, have to maintain those
versions as framework installs. Is that OK?
--
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Julian Scheid julian...@gmail.com added the comment:
I was a bit surprised myself but I've just double-checked and it seems
to work fine. I started with a freshly unpacked 3.0.1 tarball and used
the following command:
./configure --enable-toolbox-glue --enable-universalsdk
Ronald Oussoren ronaldousso...@mac.com added the comment:
Uploading a patch is fine, my comment was just a warning that your patch
won't be applied in the repository (at least not for 2.4 and 2.5).
I will look at your patch for 2.6 in the near future.
Are you sure that the issue is fixed in
New submission from Wolfgang Schnerring wosc+pyt...@wosc.de:
When pdb is called from inside a doctest under python2.5, the readline
keys do not work anymore -- like they did just fine in 2.4.
Steps to reproduce:
1. Create two files, foo.txt and foo.py, like so:
$ cat foo.txt
import pdb;
jvdias jason.vas.d...@gmail.com added the comment:
C source code implementing psem.* python module functions
--
Added file: http://bugs.python.org/file13662/psempy.c
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Changes by jvdias jason.vas.d...@gmail.com:
Removed file: http://bugs.python.org/file13655/psempy.c
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Julian Scheid julian...@gmail.com added the comment:
On second thought, are you sure that's how fullinstall is meant to work?
If I use frameworkinstall I get the following message at the end:
* Note: not installed as 'python'.
* Use 'make fullinstall' to install as 'python'.
* However, 'make
Changes by jvdias jason.vas.d...@gmail.com:
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components: +Interpreter Core
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New submission from Robert Collins robe...@robertcollins.net:
Original mail:
JML's testtools has a TestResult subclass with a done() method. The
reason for this method is to allow doing things after the last test has
run. While a result can infer 'first test' it can't infer 'last test'
without
Robert Collins robe...@robertcollins.net added the comment:
Now, some refinements, as usual (for me at least) when considering a
feature like this from an upstream perspective, where one's immediate
use cases are just special cases not general case, I've come up with
some refinements.
Firstly,
New submission from Floris Bruynooghe floris.bruynoo...@gmail.com:
ld_so_aix is used to invoke the linker correctly on AIX. However when
the linking fails the script happily returns 0 and a Makefile using it
will assume all went well.
See the trivial patch attached.
--
components:
Julian Scheid julian...@gmail.com added the comment:
Ah, that makes sense - thanks for clarifying.
And I was mistaken about 2.6, the no-suffix symlinks are there in
$PREFIX/bin so all is good.
Let me know what you think of the patch when you get a chance to look at it.
--
jvdias jason.vas.d...@gmail.com added the comment:
PS: Timings for x86{-32,-64} or ia{32,64} architectures are likely
to show a significantly smaller speedup because they truly are
MIMD CISC pipeline machines ( the multiple-core feature and
IA64 instruction triplet groups mean they
Ronald Oussoren ronaldousso...@mac.com added the comment:
For 3.1 I need to check if the right files get install into the various
'bin' directories. At the languages summit at PyCon'09 the consensus
seemed to be that the command-line interpreter for Python 3.x should be
python3 and that
jvdias jason.vas.d...@gmail.com added the comment:
I suggest a new sys SysV-semaphore API :
sys.semget( sem_key, sem_nsems, sem_flags)
sys.SEM_KEY_ANY = 0
sys.SEM_UNDO= 0x1000 /*chain of atomic kernel UNDO operations*/
sys.SEM_GETPID = 11 /* get sempid */
sys.SEM_GETVAL =
Changes by jvdias jason.vas.d...@gmail.com:
Removed file: http://bugs.python.org/file13657/psem_example.py
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Changes by djc dirk...@ochtman.nl:
--
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djc dirk...@ochtman.nl added the comment:
I'll take a stab at doing it Raymond's way this weekend.
--
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Michael Foord mich...@voidspace.org.uk added the comment:
startTestRun and stopTestRun sound good to me.
--
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R. David Murray rdmur...@bitdance.com added the comment:
I think taking this to python-ideas to discuss the API (and the
implementation) would be the best way forward. You can probably get
help on the Windows stuff there, too.
You are also going to need unit tests.
--
nosy:
jvdias jason.vas.d...@gmail.com added the comment:
Contrast what I had to do to perform a process semaphore operation
in Python with how one would do it in PERL :
-- Perl 5.10.0 documentation --
Show toolbar
Home Language reference Functions semop
semop
Perl functions A-Z | Perl functions by
Paul Morelle madp...@htkc.org added the comment:
Hello, I can reproduce the bug on a Windows XP Professional, SP 3, with
three versions of Python:
Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)] on
win32
Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit
R. David Murray rdmur...@bitdance.com added the comment:
If you are passing a custom environment to a subprocess, then you must
supply everything in that environment that the program you are calling
requires in order to run.
That said, it would be a good idea to document the Windows minimum
Paul Morelle madp...@htkc.org added the comment:
I have just figured out that if you initialize env with
os.environ.copy() and then add/modify its components, then the bug
disappears:
env = os.environ.copy()
env['FOO'] = 'BAR'
[…]
But I have no idea (for the moment) of which variable is
New submission from Walter Dörwald wal...@livinglogic.de:
This patchs makes it possible to use tabs for indenting the output of
json.dumps(). With this patch the indent argument can now be either an
integer specifying the number of spaces per indent level or a string
specifying the indent string
Changes by jvdias jason.vas.d...@gmail.com:
--
versions: +Python 3.0, Python 3.1
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Christoph Zwerschke c...@online.de added the comment:
This is a related problem on Windows:
'%g' % 1e400 - '1.#INF'
'%.f' % 1e400 -- '1'
--
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Changes by R. David Murray rdmur...@bitdance.com:
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versions: -Python 2.6, Python 3.0
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Doug Philips d...@mac.com added the comment:
Quite useful! Names are hard, but the ones proposed are pretty good.
--
nosy: +dgou
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New submission from Dan Schult dsch...@colgate.edu:
In the depths of dictobject.c one can see that dict_setdefault uses two
identical calls to PyObject_Hash and ma_lookup. The first to see if the
item is in the dict, the second (only if key is not present) to add the
item to the dict.
This
Changes by Dan Schult dsch...@colgate.edu:
--
keywords: +patch
Added file: http://bugs.python.org/file13665/dict_setdefault.patch
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Changes by Raymond Hettinger rhettin...@users.sourceforge.net:
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assignee: - rhettinger
nosy: +rhettinger
versions: -Python 2.6, Python 3.0
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Changes by Georg Brandl ge...@python.org:
--
assignee: - pitrou
nosy: +pitrou
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http://bugs.python.org/issue5322
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New submission from Paul Moore p.f.mo...@gmail.com:
In revision 62197, Mon Apr 7 01:53:39 2008 UTC, Mark Hammond added code
to Lib/distutils/command/bdist_wininst.py which was intended to select
an architecture-specific installer executable.
In doing so, the code appears to have broken the
Raymond Hettinger rhettin...@users.sourceforge.net added the comment:
Inlining code saves work but breaks the effort to minimize the number of
functions that have direct access to the underlying data structure.
The performance of setdefault() is hard to improve in real apps because
the cost of
Walter Dörwald wal...@livinglogic.de added the comment:
The problem with your patch is that it calls PyUnicode_DecodeUTF8()
twice. It would be better if step 1 in the code would include the %s
format specifiers and step 3 would then call PyUnicode_DecodeUTF8() and
put the result into the
Mark Hammond mhamm...@users.sourceforge.net added the comment:
+1 on the idea - it's not the first time I've forgotten that works on
platforms other than Windows. It appears the patch you attached is
reversed though (or its just way too early for me...)
--
Tarek Ziadé ziade.ta...@gmail.com added the comment:
Mark, I have just applied the patch in r71413 because it was obvious.
If it's fine with you I'll backport it to 2.6 so it makes it to 2.6.2 final
--
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R. David Murray rdmur...@bitdance.com added the comment:
Committed in r71414.
--
resolution: - accepted
status: open - closed
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Martin v. Löwis mar...@v.loewis.de added the comment:
Martin, any thoughts?
The same as always: Dan, do you have any benchmarks
that demonstrate the speedup?
Looking at the usage of setdefault in the standard library,
it seems that it's most of the time either an interned string,
or an object
Tarek Ziadé ziade.ta...@gmail.com added the comment:
fixed in r71413 and r71415.
Thanks for the patch !
--
status: open - closed
versions: +Python 2.7, Python 3.0, Python 3.1
___
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Lenard Lindstrom le...@telus.net added the comment:
The notepad example works with Pythons 2.4.4 and 2.5.4 on Windows 98. So
something changed in Windows XP. The 0xc0150004 error code crops up when
a side-by-side assembly fails to load. The DLL loader appears to use the
SystemRoot environment
R. David Murray rdmur...@bitdance.com added the comment:
In issue5672 Martin said:
If somebody would provide a patch that adds prctl to the posix module,
that would be fine with me - we have a long tradition of exposing all
available system calls if somebody wants them.
However, you are
Bob Ippolito b...@redivi.com added the comment:
I don't think the decorator approach would work for the doctests, it looks
like it could be an interesting approach though. I have a feeling that
it's going to have to be done in some kind of ugly subclass though, I'll
dig into unittest deeper
Andrew I MacIntyre aimacint...@users.sourceforge.net added the comment:
Antoine, in my testing the loss of the HAS_ARG() optimisation in my
patch appears to have negligible cost on i386, but starts to look
significant on amd64.
On an Intel E8200 cpu running FreeBSD 7.1 amd64, with gcc 7.2.1 and
Dan Schult dsch...@colgate.edu added the comment:
Benchmarks:
Upon trying cooked up examples, I do not notice any speedup
beyond 5-10%. Seems like function calling time swamps everything
for small examples with fast hashes. I don't have a handy dandy
example with long hash times or long lookup
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