Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes:
Not quite. A mole (abbreviation: mol) is a name for a specific number,
like couple (2) or dozen (12) or gross (144), only much bigger: 6.02e23.
And I can't believe I still remember that value :-)
Avogadro's Number is worth
Hello Friends ,
Iam a newbie to python , Iam writing a small script that would generate
various kinds of files
in the specified path . Iam using sub process module to achieve this , I
have stuck with few basic problems , any help on this would be great
Case (a) :
The below code creates the
On Thursday, August 15, 2013 7:51:43 PM UTC+5:30, prem kumar wrote:
Hi All,
Presently Iam working with QTP(VBscript)..Now planning to learn PYTHON..Could
you please suggest me like is ti good to learn what is the present condition
for Python in IT Companies..
Iam not thinking abt
Thanks Marcel,
I will give it a try during the weekend and let you know if it worked for me :)
If you have a recent version of pip, you can use wheels [1] to save built
packages locally. First create a new virtualenv and install the common
packages. Then put these packages in a wheel
Hello,
I am desperately trying to get my python script running, but I alway get a
403-Error.
apache logfile says:
Options ExecCGI is off in this directory:/home/user12/cgi-bin/showblogs.py
-
apache configuration:
Directory /home/user12/cgi-bin/
AllowOverride None
AddType application/python .py
Hi Ganesh, and welcome!
Unfortunately, you ask your questions in reverse order. The most general
(and important) question comes last, and the least important first, so
I'm going to slice-and-dice your post and answer from most general to
least.
On Fri, 16 Aug 2013 11:51:32 +0530, Ganesh Pal
In article mailman.613.1376632775.1251.python-l...@python.org,
Ben Finney ben+pyt...@benfinney.id.au wrote:
Avogadro's Number is worth remembering, for mocking the pseudo-science
of homeopathy URL:http://www.1023.org.uk/what-is-homeopathy.php.
You have obviously never argued science with a
In article mailman.614.1376636762.1251.python-l...@python.org,
Ganesh Pal ganesh1...@gmail.com wrote:
# Creating sparse files in the sparse path
sparse_path = os.path.join(path,'sparsefiles')
os.makedirs(sparse_path)
os.chdir(sparse_path)
sparsefiles = dd if=/dev/zero
-
A mole is an amount of matter measured in [kg] .
The Avogadro's number can only be a dimensionless number, [1] .
The Avogadro's constant is the Avogadro's number (of pieces or
objects) per mol, [1 / mol].
A chemist has to work and is always working in mole; as his
balance can only measure
In article 2d88bc0f-fdcb-4685-87ed-c17998dd3...@googlegroups.com,
wxjmfa...@gmail.com wrote:
A chemist has to work and is always working in mole; as his
balance can only measure a mass, the calculation mole - mass
is always mandatory.
That's because chemists are lazy.
The recipe says, Add
On 2013-08-16, Roy Smith r...@panix.com wrote:
In article mailman.613.1376632775.1251.python-l...@python.org,
Ben Finney ben+pyt...@benfinney.id.au wrote:
Avogadro's Number is worth remembering, for mocking the pseudo-science
of homeopathy URL:http://www.1023.org.uk/what-is-homeopathy.php.
I have a mixed binary/text file[0], and the text portions use a radically
nonstandard character set. I want to read them easily given information
about the character encoding and an offset for the beginning of a string.
The descriptions of the codecs module and codecs.register() in particular
THRINAXODON GETS REVENGE AGAINST SMITHSONIAN ASS HOLES.
TODAY; THE SMITHSONIAN BURNED THRINAXODON'S HOUSE DOWN; AS HE WENT TO
GET GROCERY'S FROM MARK'S.
THE ARSONISTS WERE
You do not say the version of apache. If it's the 2.4
must change allow from all to Require all granted.
HTH
--
Xavi
El 16/08/2013 12:28, helmut_bl...@web.de escribió:
Hello,
I am desperately trying to get my python script running, but I alway get a
403-Error.
apache logfile says:
Options
On Friday, August 9, 2013 9:10:18 PM UTC-4, Steven D'Aprano wrote:
I am seeking comments on PEP 450, Adding a statistics module to Python's
standard library:
http://www.python.org/dev/peps/pep-0450/
Please read the FAQs before asking anything :-)
I think this is a super idea.
I am seeking comments on PEP 450, Adding a statistics module to Python's
The trick here is that numpy really is the right way to do this stuff.
I like to say:
crunching numbers in python without numpy is like doing text processing
without using the string object
What this is really an
On Friday, August 16, 2013 5:41:56 PM UTC+2, Xavi wrote:
You do not say the version of apache. If it's the 2.4
must change allow from all to Require all granted.
it is apache2.2.14, so that's not the point.
--
http://mail.python.org/mailman/listinfo/python-list
On Friday 16 August 2013 10:07:12 Roy Smith did opine:
In article 520da6d1$0$3$c3e8da3$54964...@news.astraweb.com,
Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote:
On Thu, 15 Aug 2013 16:43:41 +0100, Chris Angelico wrote:
A mole is as much a number (6e23) as the light
On Friday 16 August 2013 10:27:36 Dave Angel did opine:
Roy Smith wrote:
In article 520da6d1$0$3$c3e8da3$54964...@news.astraweb.com,
Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote:
On Thu, 15 Aug 2013 16:43:41 +0100, Chris Angelico wrote:
A mole is as much a number
On 16 August 2013 17:31, chris.bar...@noaa.gov wrote:
I am seeking comments on PEP 450, Adding a statistics module to Python's
The trick here is that numpy really is the right way to do this stuff.
Although it doesn't mention this in the PEP, a significant point that
is worth bearing in mind
I found that BDD is a very good philosophy for coding and checking my program,
and I decided to use either of these two software. However, it seems these two
are very similar in the way they function. As professionals, what do you prefer
and why?
--
Shen is a hypermodern functional programming language based on a core that is
essentially a Lisp, but portable to many major language platforms. One of these
platforms is Python. I am asking for support for the Shen project in this video
appeal
www.shenlanguage.org/appeal.html
The video
On Fri, Aug 16, 2013, at 7:47, Roy Smith wrote:
There is no need to shell out to dd just to do this. All dd is doing
for you is seeking to the offset you specify and closing the file. You
can do that entirely in Python code.
http://docs.python.org/2.7/library/stdtypes.html#file.seek
On Fri, 16 Aug 2013 09:31:34 -0700, chris.barker wrote:
I am seeking comments on PEP 450, Adding a statistics module to
Python's
The trick here is that numpy really is the right way to do this stuff.
Numpy does not have a monopoly on the correct algorithms for statistics
functions, and a
On Friday, August 16, 2013 10:15:52 AM UTC-7, Oscar Benjamin wrote:
On 16 August 2013 17:31, chris.bar...@noaa.gov wrote:
Although it doesn't mention this in the PEP, a significant point that
is worth bearing in mind is that numpy is only for CPython, not PyPy,
IronPython, Jython etc. See
On Fri, 16 Aug 2013 10:02:08 -0400, Andrew wrote:
I have a mixed binary/text file[0], and the text portions use a
radically nonstandard character set. I want to read them easily given
information about the character encoding and an offset for the beginning
of a string.
Mixed binary/text is
CM wrote:
On Friday, August 9, 2013 9:10:18 PM UTC-4, Steven D'Aprano wrote:
I am seeking comments on PEP 450, Adding a statistics module to Python's
standard library:
I think it's a very good idea. Good PEP points, too. I hope it happens.
+1 especially for non-Cpython versions of
On 16 August 2013 20:00, chris.bar...@noaa.gov wrote:
One other point -- for performance reason, is would be nice to have some
compiled code in there -- this adds incentive to put it in the stdlib --
external packages that need compiling is what makes numpy unacceptable to
some folks.
On Friday, August 16, 2013 11:51:49 AM UTC-7, Steven D'Aprano wrote:
The trick here is that numpy really is the right way to do this stuff.
Numpy does not have a monopoly on the correct algorithms for statistics
functions,
indeed not -- in fact, a number of them are quite lame, either
On 16 Aug 2013 19:12:02 GMT, Steven D'Aprano wrote:
If you try opening the file in text mode, you'll very likely break the
binary parts (e.g. converting the two bytes 0x0D0A to a single byte
0x0A). So best to stick to binary only, extract the text portions of
the file, then explicitly
cerr ron.egg...@gmail.com writes:
Hi,
I have a Python script that is executing an http POST to transfer a file from
the client to the server. I have achieved this with below code:
snip
but my problem is, the data gets posted to the sever but arrives in
the `$_REQUEST` array and I'm
On Fri, Aug 16, 2013 at 3:02 PM, Andrew andrew@invalid.invalid wrote:
I have a mixed binary/text file[0], and the text portions use a radically
nonstandard character set. I want to read them easily given information
about the character encoding and an offset for the beginning of a string.
To
Gene Heskett wrote:
Where a 1 degree shift, may or may not have been noticeable, was
the cable equivalent of 7.7601420788892939683e-10 seconds, which was for
the small foam cored cables used for such, with a Propagation Velocity of
0.78*C, only a very short length of cable. I'd have figured
You could say that all translated languages lose something in translation.
It's all symbolism.
I say sunshine, and you might say Great Ball of' Fire in the s ky.
Isay x = 10 in python
print x
and in c++
something like
unsigned int x
cin x;
cout x;
or something like that.
It's something
Is this social network app based, or browser based. Either will need an
updated server file, or a db field.
On Tue, Aug 13, 2013 at 7:08 PM, Ben Finney ben+pyt...@benfinney.id.auwrote:
Alec Taylor alec.tayl...@gmail.com writes:
Fear open-sourcing fledgling social-networks; as
In article 0d60fd90-eb19-4702-acd5-dd7ba0edd...@googlegroups.com,
taldcr...@cfa.harvard.edu wrote:
Python is showing up in high-school and colllege intro programming
courses here in the U.S.
Yup. For the past few years, I've been a judge in the NYC Science and
Engineering Fair
On Fri, 16 Aug 2013 05:27:49 +, Dave Angel wrote:
I figure it just under a foot. I once attended a lecture by Grace
Hopper where she handed out nanoseconds, pieces of wire about a foot
long.
Is that based on the speed of light in a vacuum, speed of light in
copper, speed of electron
On Sat, Aug 17, 2013 at 3:38 AM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
On Fri, 16 Aug 2013 05:27:49 +, Dave Angel wrote:
I figure it just under a foot. I once attended a lecture by Grace
Hopper where she handed out nanoseconds, pieces of wire about a foot
long.
Is
Some time ago there was a post asking for help on a rock/paper/scissors
game. I read that thread at the time it was posted, but since it
received several answers I didn't pay too much attention to it. But I
can't find that thread again right now. However, the subject stuck
(loosely) in my
--
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Changes by Serhiy Storchaka storch...@gmail.com:
--
assignee: docs@python - serhiy.storchaka
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18743
___
Glenn Linderman added the comment:
Paul, is this ready to merge, or are you thinking of more refinements?
--
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue14191
___
Ethan Furman added the comment:
Eric, please do not feel your time has been wasted. I greatly appreciate the
knowledge you shared and I learned much.
I feel very strongly that, as much as possible, an Enum should Just Work.
Requiring users to write their own __format__ any time they create
Ethan Furman added the comment:
This patch contains the previous patch, plus a fix and tests for %i, %d, and %u
formatting, and tests only for %f formatting (nothing to fix there, but don't
want it breaking in the future ;) .
--
Added file:
New submission from Kees Bos:
ElementTree.fromstring and cElementTree.fromstring fail on parsing
value]]/value, but do parse value]]gt;/value
$ python
Python 2.7.3 (default, Apr 10 2013, 05:09:49)
[GCC 4.7.2] on linux2
Type help, copyright, credits or license for more information.
from
Charles-François Natali added the comment:
I've just had a quick look at the patch, but from what I can see,
socket.getaddrinfo() will return a raw integer for the family, and not an
AddressFamily instance. That's unfortunate.
--
___
Python tracker
Charles-François Natali added the comment:
I was thinking about dropping the C wrapper from socketmodule.c, and
replacing it with a pure Python implementation (e.g. the one posted by
Richard on python-dev).
What do you think?
--
___
Python tracker
Charles-François Natali added the comment:
Here's an updated patch using the lru_cache decorator.
--
Added file: http://bugs.python.org/file31312/connect_timeout-1.diff
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue16463
Charles-François Natali added the comment:
Unfortunately, there's not much we can do about it: if dlsym() fails - which is
the case here either because read() fails with EBADF, or because the file
descriptor now points to another stream (i.e. not libgcc), the libc aborts
(here upon
Roundup Robot added the comment:
New changeset f6034602410c by Christian Heimes in branch 'default':
Issue #18673: Add O_TMPFILE to os module. O_TMPFILE requires Linux kernel
http://hg.python.org/cpython/rev/f6034602410c
New changeset 815b7bb3b08d by Christian Heimes in branch 'default':
Issue
Antoine Pitrou added the comment:
Perhaps the only thing we could do would be try to preload libgcc by calling
one of those APIs at startup? But I'm not sure it's a good idea to add such a
platform-specific hack (for what is arguably an obscure and rare issue).
--
nosy: +pitrou
Christian Heimes added the comment:
I have added O_TMPFILE to the os module.
I like to hold off with the actual use of O_TMPFILE in tempfile until Python
3.5. The feature is too new and I don't have any way to test it. Some people
have reported file system corruption in 3.11-rc4, too.
Changes by STINNER Victor victor.stin...@gmail.com:
--
nosy: +haypo
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18748
___
___
Python-bugs-list
Changes by Christian Heimes li...@cheimes.de:
--
status: pending - closed
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18368
___
___
Ezio Melotti added the comment:
it seems try/except is still the best way. :-/
Indeed: http://docs.python.org/dev/glossary#term-eafp
--
nosy: +ezio.melotti
stage: - committed/rejected
___
Python tracker rep...@bugs.python.org
STINNER Victor added the comment:
Maries Ionel Cristian ubuntu 12.04.2
What is the version of your libc library? Try something like dpkg -l libc6.
--
Could this issue be related to this glibc issue?
http://sourceware.org/bugzilla/show_bug.cgi?id=2644
I ran your script on Python 3.4 in a
STINNER Victor added the comment:
Oh ok, I'm able to reproduce the issue with the system Python 3.3:
$ while true; do echo loop; python3.3 bug.py || break; done
loop
...
loop
libgcc_s.so.1 must be installed for pthread_cancel to work
Abandon (core dumped)
--
R. David Murray added the comment:
Hmm. The linked issue says the PyMappingCheck behavior is new in Python3, but
this problem exists in Python2 (back to 2.4 at least) as well. Perhaps it is a
different bug in Python2.
--
___
Python tracker
Eli Bendersky added the comment:
Great catch, Charles-François, thanks. It's actually an interesting example in
favor of the approach - it's very nice to see descriptive family names in the
data returned by getaddrinfo, instead of obtuse numeric values.
The attached patch fixes it in a
R. David Murray added the comment:
Why do you think this is a bug? (You may well be right; I'm not familiar with
the intricacies of XML. But on its face the behavior looks reasonable.)
--
nosy: +r.david.murray
___
Python tracker
Eric V. Smith added the comment:
The code looks basically the same in 2.7, and there PyMapping_Check looks for
__getitem__, so maybe issue 5945 is just incorrect in its analysis.
In any event, I'm not sure this is worth fixing. There are lots of little
corner cases that could be broken.
Eli Bendersky added the comment:
Looks nice:
for t in socket.getaddrinfo('www.google.com', 'http'):
... t
...
(AddressFamily.AF_INET: 2, 1, 6, '', ('74.125.239.112', 80))
(AddressFamily.AF_INET: 2, 2, 17, '', ('74.125.239.112', 80))
(AddressFamily.AF_INET: 2, 1, 6, '', ('74.125.239.116',
New submission from STINNER Victor:
Python 3.4 has a new command line option to run Python in isolated mode: -I.
IMO it would be nice to use this option to make the test suite more independant
of the user configuration and the environment.
Attached patch modifies the test.script_helper module
STINNER Victor added the comment:
The test does now pass with the patch, so I close the issue.
--
resolution: - fixed
status: open - closed
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18296
Eli Bendersky added the comment:
Looks pretty good, Serhiy. I left some comments in Rietveld.
--
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue16799
___
New submission from Brett Cannon:
imp._HackedGetData doesn't check if the file it cached from its constructor is
still open or not. Since the path had previously been stored it would make
sense to try re-opening the file if the file object has already been closed.
--
assignee:
Changes by Ethan Furman et...@stoneleaf.us:
--
assignee: - ethan.furman
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18745
___
___
Jesús Cea Avión added the comment:
I confirm this. The patch for 5.3 support created a regression. And, in fact,
it is not working at all (it missed the 5.x libraries anyway).
Reopening the old bug.
In the meantime, please check http://www.jcea.es/programacion/pybsddb.htm
--
Changes by Jesús Cea Avión j...@jcea.es:
--
nosy: +doko
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18734
___
___
Python-bugs-list mailing list
Jesús Cea Avión added the comment:
This patch is incorrect.
It doesn't compile with Berkeley DB 5.x at all, and it doesn't allow to compile
against 4.4-4.9 (previously supported). So currently it is a bit regression.
Check bug #18734.
--
nosy: +Eddie.Stanley
resolution: fixed -
Jesús Cea Avión added the comment:
Note also that reusing my pybsddb project you are dropping support for several
old releases of Berkeley DB that where supported by Python 2.7.4.
If somebody were using it, they are left dead in the water, just because doing
a minor Python upgrade.
New submission from Christian Heimes:
I have seen complains from e.g. Tarek that os.urandom() fails under high load:
https://twitter.com/tarek_ziade/status/362281268215418880
The problem is caused by file descriptor limits. os.urandom() opens
/dev/urandom for every call. How about
STINNER Victor added the comment:
I have seen complains from e.g. Tarek that os.urandom() fails under high
load: https://twitter.com/tarek_ziade/status/362281268215418880
dev_urandom_python() should handle ENFILE and ENOENT differently to raise a
different exception. Or it should always
Serhiy Storchaka added the comment:
Here is a patch. Actually this is a small part of larger problem for which I
will open several separated issues.
--
keywords: +patch
stage: needs patch - patch review
Added file: http://bugs.python.org/file31315/doc_StringIO_refs.patch
Changes by Antoine Pitrou pit...@free.fr:
--
nosy: +christian.heimes
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18618
___
___
Python-bugs-list
Antoine Pitrou added the comment:
I don't think that's bug in os.urandom(). If os.urandom() doesn't fail,
something else will fail soon after.
OTOH, the error is clearly misleading. The NotImplementedError should only be
raised for certain errnos (such as ENOENT, ENODEV, ENXIO and EACCES), not
Charles-François Natali added the comment:
Perhaps the only thing we could do would be try to preload libgcc by
calling one of those APIs at startup?
Yeah, I was thinking about doing this in PyThread_init_thread() but...
But I'm not sure it's a good idea to
add such a platform-specific
Brett Cannon added the comment:
Haven't looked at the patch but the motivation behind it sounds good to me.
--
nosy: +brett.cannon
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18754
___
Jesús Cea Avión added the comment:
Patch is incomplete. I found this error while reading unittest.mock, that you
are not patching.
--
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18743
___
Jesús Cea Avión added the comment:
I agree with Antoine. Exhausting the FDs is not the problem, the problem is the
misleading error.
--
nosy: +jcea
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18756
Christian Heimes added the comment:
For the record PHP has assigned CVE-2013-4248 for the issue.
--
___
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http://bugs.python.org/issue18709
___
Richard Oudkerk added the comment:
Do you mean you want to use a pure python implementation on Unix?
Then you would have to deal with AF_UNIX (which is the default family for
socketpair() currently). A pure python implementation which deals with AF_UNIX
would have to temporarily create a
Tarek Ziadé added the comment:
If os.urandom() doesn't fail, something else will fail soon after.
the random pool can be exhausted, but this is not soon after I think. In
Linux and Mac OS X, ulimit -n defaults to 512 and 256.
It's very easy to reach that limit if you write a web app that
Tarek Ziadé added the comment:
Can tarek tell us more about its usecases: is he directly calling
os.urandom() or does he use the random module? How many threads?
I was using ws4py inside greenlets. ws4py uses os.urandom() to generate some
keys. So one single thread, many greenlets.
Charles-François Natali added the comment:
If os.urandom() doesn't fail, something else will fail soon after.
the random pool can be exhausted, but this is not soon after I think. In
Linux and Mac OS X, ulimit -n defaults to 512 and 256.
I don't think he's referring to the entropy pool, but
Christian Heimes added the comment:
Tarek Ziadé added the comment:
If os.urandom() doesn't fail, something else will fail soon after.
the random pool can be exhausted, but this is not soon after I think. In
Linux and Mac OS X, ulimit -n defaults to 512 and 256.
It's highly unlikely
Tarek Ziadé added the comment:
What does high load mean?
a web app with a few hundreds concurrent requests.
If you mean many concurrent threads, then you should probably go for
the random module, no?
I use greenlets. But, I don't know - are you suggesting os.urandom() should be
marked in
Charles-François Natali added the comment:
2013/8/16, Tarek Ziadé rep...@bugs.python.org:
I use greenlets. But, I don't know - are you suggesting os.urandom() should
be marked in the documentation as DOES NOT SCALE and I should use another
API ? Which one ?
Well, even with greenlets, I
Tarek Ziadé added the comment:
Well, even with greenlets, I assume you're using at least one FD
(socket) per client, no?
So you can get EMFILE on socket() just as on os.urandom().
I do many calls on urandom() so that's the FD bottleneck.
So os.urandom() isn't your biggest problem here.
Of
Christian Heimes added the comment:
Am 16.08.2013 18:24, schrieb Charles-François Natali:
Well, first we'll have to make the code thread-safe, if we want to
keep a persistent FD open. Which means we'll have to add a lock, which
is likely to reduce concurrency, and overall throughput.
Why
Antoine Pitrou added the comment:
Well, even with greenlets, I assume you're using at least one FD
(socket) per client, no?
So you can get EMFILE on socket() just as on os.urandom().
I do many calls on urandom() so that's the FD bottleneck.
Unless you're doing many calls *in parallel*
Catherine Devlin added the comment:
Attaching new patch incorporating Vajrasky's suggestion
--
Added file: http://bugs.python.org/file31316/test1666318.patch
___
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Changes by Ezio Melotti ezio.melo...@gmail.com:
--
resolution: - fixed
stage: patch review - committed/rejected
status: open - closed
___
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___
Charles-François Natali added the comment:
I do many calls on urandom() so that's the FD bottleneck.
So os.urandom() isn't your biggest problem here.
Of course it is. But it looks like you know better without having looked at
the code. :)
So please explain me :-)
os.urandom() can only be
Antoine Pitrou added the comment:
Am 16.08.2013 18:24, schrieb Charles-François Natali:
Well, first we'll have to make the code thread-safe, if we want to
keep a persistent FD open. Which means we'll have to add a lock, which
is likely to reduce concurrency, and overall throughput.
Why
Kees Bos added the comment:
I'm not an expert, but from: http://www.w3.org/TR/REC-xml/#NT-AttValue
AttValue ::= '' ([^] | Reference)* '' | ' ([^'] | Reference)*
'
which I read as: Any Reference character is valid, except and , which are
used for escaping and closing the element.
Changes by Antoine Pitrou pit...@free.fr:
--
nosy: +eli.bendersky, scoder
___
Python tracker rep...@bugs.python.org
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___
___
Christian Heimes added the comment:
Am 16.08.2013 18:47, schrieb Charles-François Natali:
I don't think it can be fixed. I think Christian's working on a PEP
for random number generators, which would probably make it easier,
although I din't have a look at it.
In the light of the recent
Tarek Ziadé added the comment:
Unless you're doing many calls *in parallel* it's unlikely to be a
bottleneck.
That's what we're saying since message 1. Antoine, allo quoi! :)
os.urandom() is a convenience function, it doesn't have to be extremely
optimized
I suggest that you tell it the
Charles-François Natali added the comment:
Why locking? /dev/urandom is a pseudo char device. You can have multiple
readers on the same fd without any locking.
You must put a lock around the open() call, though, to avoid calling it
several times and losing an fd.
Exactly (unless the FD is
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