Could someone please explain to me why the two values at the bottom of
this example are different?
Python-3.3 if it makes any difference.
Is this a difference in evaluation between a class attribute and an
instance attribute?
--rich
class C:
def __init__(self):
self._x = None
K Richard Pixley added the comment:
I see your point.
The alternative would be to limit the size of archive that can be extracted
from to the size of virtual memory, which is essentially what I'm doing
manually. Either way, someone will be surprised. I'm not which which way will
result
K Richard Pixley added the comment:
New info...
I see the degradation on most of the linux boxes I've tried:
* ubuntu-13.04, (raring), 64-bit
* rhel-5.4 64-bit
* rhel-5.7 64-bit
* suse-11 64-bit
I see some degradation on MacOsX-10.8.4 but it's in the acceptable range, more
like 2x than 60x
K Richard Pixley added the comment:
Here's a script that tests for the problem.
--
Added file: http://bugs.python.org/file31303/tarproblem.py
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue18744
New submission from K Richard Pixley:
There's a problem with tarfile. Write a program to traverse the contents of a
modest sized tar archive. Make sure your tar archive is compressed. Then read
the tar archive with your program.
I'm finding that allowing tarfile to read a compressed
K Richard Pixley r...@noir.com added the comment:
I think a better solution that declaring it to be apple's bug would be to
release one binary for pre-10.7, (or maybe 10.6 with the current xcode), and a
different binary for post-10.7.
This isn't an apple bug in the sense that there's anything
On 1/20/12 07:44 , Andrea Crotti wrote:
I normally didn't bother too much when reading from files, and for example
I always did a
content = open(filename).readlines()
But now I have the doubt that it's not a good idea, does the file
handler stays
open until the interpreter quits?
So maybe
On 1/21/12 03:38 , Lie Ryan wrote:
It is only strictly necessary for programs that opens thousands of files
in a short while, since the operating system may limit of the number of
active file handlers you can have.
The number you're looking for is 20 on many unix systems. That's all.
20
On 1/23/12 21:57 , Rick Johnson wrote:
Here is a grep from the month of September 2011 showing the rampantly
egregious misuse of the following words and phrases:
* pretty
* hard
* right
* used to
* supposed to
Pretty is the most ludicrous of them all! As you will see, pretty
is used
On 1/25/12 12:14 , Rick Johnson wrote:
You don't even need
pretty to get your point across.
If that's your argument, then we can drop the verb to be, most
articles, most verb conjugations, and nearly all adjectives and adverbs.
For that matter, the vast majority of posts here can be dropped
On 1/11/12 18:19 , Matthew Pounsett wrote:
Second, I'm trying to get a handle on how libraries are meant to
integrate with the applications that use them. The naming advice in
the advanced tutorial is to use __name__ to name loggers, and to allow
log messages to pass back up to the using
On 1/11/12 12:16 , Máté Koch wrote:
Hello All,
I'm developing an app which stores the data in file system database. The data
in my case consists of large python objects, mostly dicts, containing texts and
numbers. The easiest way to dump and load them would be pickle, but I have a
problem
On 1/9/12 16:41 , Philipp Hagemeister wrote:
I want to forbid my application to access the filesystem. The easiest
way seems to be chrooting and droping privileges. However, surprisingly,
python loads the codecs from the filesystem on-demand, which makes my
program crash:
import os
os.getuid()
New submission from K Richard Pixley r...@noir.com:
Once I've instantiated my server class, along with a handler class, called
server.serve_forever(), handler.handle() has been called, I've done my work,
and I'm ready to shut the whole thing down...
How do I do that?
The doc says
K Richard Pixley r...@noir.com added the comment:
It appears as though the problem is that shutdown() blocks waiting for the
serve_forever loop to terminate, which won't happen as long as the process is
blocked on shutdown.
I'd like to propose that the library be changed to eliminate
K Richard Pixley r...@noir.com added the comment:
On second thought, my proposal is likely to break existing code, so I withdraw
it.
I don't know how to exit the server in a way that both works in all conditions
and also continues to support existing semantics.
I expect we'll need to create
You get some of the good stuff by importing future, unicode literals
which essentially means you're working in unicode by default most of the
time, and print function, (a small fix but long overdue).
I try to write python3 whenever I can. It's rare that dependencies keep
me back. More often
Once I've instantiated my server class, along with a handler class,
called server.serve_forever(), handler.handle() has been called, I've
done my work, and I'm ready to shut the whole thing down...
How do I do that?
The doc says server.shutdown(), but if I call self.server.shutdown()
from
On 1/1/12 19:04 , K Richard Pixley wrote:
On 1/1/12 16:49 , K Richard Pixley wrote:
I'm having trouble finding a reasonable python environment on mac.
The supplied binaries, (2.7.2, 3.2.2), are built with old versions of
macosx and are not capable of building any third party packages
Where would I look to find the current expected status of python3 on
MacOsX Lion?
The distributed binaries aren't capable of allowing extensions that use gcc.
I can build the source naked, but then it lacks some libraries, notably,
readline.
Attempting to build the full Mac packages fails,
On 1/2/12 13:03 , Benjamin Kaplan wrote:
On Mon, Jan 2, 2012 at 2:32 PM, K Richard Pixleyr...@noir.com wrote:
Where would I look to find the current expected status of python3 on MacOsX
Lion?
The distributed binaries aren't capable of allowing extensions that use gcc.
I can build the source
I'm having trouble finding a reasonable python environment on mac.
The supplied binaries, (2.7.2, 3.2.2), are built with old versions of
macosx and are not capable of building any third party packages that
require gcc.
The source builds easily enough out of the box, (./configure
On 1/1/12 16:49 , K Richard Pixley wrote:
I'm having trouble finding a reasonable python environment on mac.
The supplied binaries, (2.7.2, 3.2.2), are built with old versions of
macosx and are not capable of building any third party packages that
require gcc.
The source builds easily enough
On 12/29/11 05:55 , Jérôme wrote:
I'm writing a small application that plays sound through the speakers. The
sounds are juste sine waves of arbitrary frequency I create in the code, not
sample .wav files.
I didn't expect the choice for an audio library to be that complicated. There
are several
On 12/29/11 23:17 , Paulo da Silva wrote:
Hi,
Sorry if this is a FAQ, but I have googled and didn't find any
satisfatory answer.
Is there a simple way, preferably multiplataform (or linux), of
generating sinusoidal/square waves sound in python?
Thanks for any answers/suggestions.
I just
On 12/26/11 21:48 , Fredrik Tolf wrote:
On Mon, 26 Dec 2011, K. Richard Pixley wrote:
I don't understand. Can anyone explain?
I'm also a bit confused about __new__. I'd very much appreciate it if
someone could explain the following aspects of it:
* The manual (http://docs.python.org
On 12/19/11 19:51 , Raymond Hettinger wrote:
Do you use IDLE when teaching Python?
If not, what is the tool of choice?
If your goal is to quickly get new users up and running in Python,
what IDE or editor do you recommend?
I would:
a) let the students pick their own editor.
b) encourage
On 12/27/11 10:28 , Ian Kelly wrote:
On Tue, Dec 27, 2011 at 10:41 AM, K Richard Pixleyr...@noir.com wrote:
The conceptual leap for me was in recognizing that a class is just an
object. The best way, (imo, so far), to create a singleton in python is to
use the class itself as the singleton
On 12/27/11 10:21 , Rick Johnson wrote:
On Dec 27, 11:59 am, K Richard Pixleyr...@noir.com wrote:
The problem is that IDLE is hard to set up. (I've never managed it and
I'm a well seasoned veteran).
Can you qualify that statement? Do you mean difficult to set up on
certain OS's? Because
On 12/27/11 10:26 , Andrew Berg wrote:
On 12/27/2011 11:59 AM, K Richard Pixley wrote:
You'd do better to encourage eclipse, but setting that up isn't
trivial either.
IIRC, all I had to do to set up PyDev was copy a URL to Eclipse's
Install New Software wizard, and have Eclipse download
On 12/27/11 12:34 , Ian Kelly wrote:
On Tue, Dec 27, 2011 at 1:31 PM, K Richard Pixleyr...@noir.com wrote:
On 12/27/11 10:28 , Ian Kelly wrote:
On Tue, Dec 27, 2011 at 10:41 AM, K Richard Pixleyr...@noir.comwrote:
The conceptual leap for me was in recognizing that a class is just an
I'm confused about the following. The idea here is that the set of
instances of some class are small and finite, so I'd like to create them
at class creation time, then hijack __new__ to simply return one of the
preexisting classes instead of creating a new one each call.
This seems to work
On 12/26/11 20:53 , Steven D'Aprano wrote:
On Mon, 26 Dec 2011 20:28:26 -0800, K. Richard Pixley wrote:
I'm confused about the following. The idea here is that the set of
instances of some class are small and finite, so I'd like to create them
at class creation time, then hijack __new__
New submission from K Richard Pixley r...@noir.com:
Install the Python-2.7.2 mac installer for Lion on Lion.
Then attempt easy_install -U psutil. I get:
za-dc-dev/bin/easy_install -U psutil
install_dir
/Users/rich/projects/za-packages/za-dependency-checker/za-dc-dev/lib/python2.7/site
K Richard Pixley r...@noir.com added the comment:
My point was for python-2.7. I haven't stumbled into the buffer protocol yet.
So no, it doesn't really.
I still think the documentation, especially the 2.7 doc, could be more explicit.
My concern here is with the use of close() becoming
K Richard Pixley r...@noir.com added the comment:
An interesting point, although I think that's only relevant if the
documentation lists the ABC and a reference to it. (python-3 doc essentially
does this.)
I see no such reference in the 2.7 gzipfile doc, which leads me to believe,
(from
K Richard Pixley r...@noir.com added the comment:
I didn't miss it.
I think the close call needs equal treatment to the open call. The mention is
certainly present, but seems implicit to me. I would prefer to see it listed
explicitly.
But I also don't think it's important enough in the 2.7
K Richard Pixley r...@noir.com added the comment:
I'm now convinced this isn't worth fixing in 2.x.
--
resolution: - wont fix
status: open - closed
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue11203
New submission from K Richard Pixley r...@noir.com:
mmap.read requires a argument. Since most file-like objects do not, this
breaks the file-like object illusion.
mmap.read argument should be optional, presumably defaulting to the entire
mmap'd area.
--
messages: 135362
nosy: rich
K Richard Pixley r...@noir.com added the comment:
Documentation needs to be updated to state that these are now context managers.
This is important since they aren't in python-2.x.
I'm not sure whether this should be added to the new in python blurbs.
--
nosy: +teamnoir
New submission from K Richard Pixley r...@noir.com:
The documentation for gzip should include the close method.
It's use in the 2.7 documentation implies it's existence but it should also be
stated explicitly that it exists.
In the 3.x documentation, the use of close not in the examples since
Announcing the first release of elffile!
Elffile is a pure python implementation of a library which reads and
writes ELF format object files
Current features:
* Elffile is pure python so installation is easy.
* Elffile has been tested on python versions 2.[67] and 3.[012].
* Reads both 32
Can anyone explain to me why this doesn't work?
class Foo(object):
@property
@classmethod
def f(cls):
return 4
I mean, I think it seems to be syntactically clear what I'm trying to
accomplish. What am I missing?
--rich
--
Announcing the first release of my Coding class.
This is a simple utility class that answers the question of how to
implement enums in python. I know there have been many other answers as
well, many of them quite fine, but this is the answer that I've been
wanting so I'm sharing it.
K Richard Pixley r...@noir.com added the comment:
How does rm -rf address this issue? Or does it?
shutils.rmtree should probably do the same thing.
--
nosy: +teamnoir
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue4489
Does anyone have this combination working?
And if so, which version of ubuntu and what did you have to do to get it
to work?
--rich
--
http://mail.python.org/mailman/listinfo/python-list
46 matches
Mail list logo
