On Thu, Apr 5, 2012 at 1:15 AM, Steve Howell wrote:
> On Apr 4, 1:37 am, Chris Angelico wrote:
>> And, as a subtle point: This method can't create the file "at size". I
>> don't know how it'll end up allocating space, but certainly there's no
>> opportunity to announce to the OS at file open/crea
On Wed, 04 Apr 2012 08:14:18 -0400, Roy Smith wrote:
>> And sparse files are really hard to reproduce, at least on Unix: on
>> Linux even the system's cp doesn't guarantee sparseness of the copy (the
>> manual mentions a "crude heuristic").
>
> I imagine the heuristic is to look for blocks of all
On Apr 4, 1:37 am, Chris Angelico wrote:
> On Wed, Apr 4, 2012 at 3:53 PM, Steven D'Aprano
>
> wrote:
> > On Tue, 03 Apr 2012 15:46:31 -0400, D'Arcy Cain wrote:
>
> >> def cp(infile, outfile):
> >> open(outfile, "w").write(open(infile).read())
>
> > Because your cp doesn't copy the FILE, it co
Am 03.04.2012 11:34 schrieb John Ladasky:
I use subprocess.call() for quite a few other things.
I just figured that I should use the tidier modules whenever I can.
Of course. I only wanted to point out that os.system() is an even worse
approach. shutils.copy() is by far better, of course.
--
On Wed, Apr 4, 2012 at 10:08 PM, Roy Smith wrote:
> Slightly off-topic, but are there file systems these days which support
> off-line copying? If I have a disk at the other end of a network link,
> it would be nice to tell the disk to copy a file and tell me when it's
> done.
Depends on your ne
In article <87fwcj4zru@dpt-info.u-strasbg.fr>,
Alain Ketterlin wrote:
> And sparse files are really hard to reproduce, at least on Unix: on
> Linux even the system's cp doesn't guarantee sparseness of the copy (the
> manual mentions a "crude heuristic").
I imagine the heuristic is to look f
On Tue, 03 Apr 2012 15:46:31 -0400, D'Arcy Cain wrote:
> > cp is not a system command, it's a shell command. Why not just use the
> > incredibly simple and portable
> >
> >>>>open("outfile", "w").write(open("infile").read())
In article <4f7be1e8$0$2$c3e8da3$54964...@news.astraweb.com>,
Steven D'Aprano writes:
> On Tue, 03 Apr 2012 15:46:31 -0400, D'Arcy Cain wrote:
>
>> On 03/28/12 16:12, John Ladasky wrote:
>>> I'm looking for a Python (2.7) equivalent to the Unix "cp" command.
>>>>>open("outfile", "w").write(open("infile").read())
> Because your cp doesn't copy the FIL
On Wed, Apr 4, 2012 at 3:53 PM, Steven D'Aprano
wrote:
> On Tue, 03 Apr 2012 15:46:31 -0400, D'Arcy Cain wrote:
>
>> def cp(infile, outfile):
>> open(outfile, "w").write(open(infile).read())
>
> Because your cp doesn't copy the FILE, it copies the file's CONTENTS,
> which are not the same thing
On Tue, 03 Apr 2012 15:46:31 -0400, D'Arcy Cain wrote:
> On 03/28/12 16:12, John Ladasky wrote:
>> I'm looking for a Python (2.7) equivalent to the Unix "cp" command.
>> Since the equivalents of "rm" and "mkdir" are in the os module, I
>> figured I look there. I haven't found anything in the docu
On 01/-10/-28163 01:59 PM, Tycho Andersen wrote:
Note, though, that this reads the whole file into memory. As many
others have said, shutil is the most idiomatic option.
* most idiomatic
* clearest in terms of showing intent
* potentially fastest
* hardest to screw up (unlike concatenating file
On Tue, Apr 03, 2012 at 03:46:31PM -0400, D'Arcy Cain wrote:
> On 03/28/12 16:12, John Ladasky wrote:
> >I'm looking for a Python (2.7) equivalent to the Unix "cp" command.
> >Since the equivalents of "rm" and "mkdir" are in the os module, I
> >figured I look there. I haven't found anything in the
On 03/28/12 16:12, John Ladasky wrote:
I'm looking for a Python (2.7) equivalent to the Unix "cp" command.
Since the equivalents of "rm" and "mkdir" are in the os module, I
figured I look there. I haven't found anything in the documentation.
I am also looking through the Python source code in os
On Tue, Apr 3, 2012 at 12:24 AM, Thomas Rachel
wrote:
> Am 02.04.2012 23:11 schrieb HoneyMonster:
>
>
>> One way:
>> import os
>>
>> os.system ("cp src sink")
>
>
> Yes. The worst way you could imagine.
>
> Why not the much much better
>
> from subprocess
> subprocess.call(['cp', 'src', 'sink'])
I use subprocess.call() for quite a few other things.
I just figured that I should use the tidier modules whenever I can.
--
http://mail.python.org/mailman/listinfo/python-list
Am 02.04.2012 23:11 schrieb HoneyMonster:
One way:
import os
os.system ("cp src sink")
Yes. The worst way you could imagine.
Why not the much much better
from subprocess
subprocess.call(['cp', 'src', 'sink'])
?
Then you can call it with (really) arbitrary file names:
def call_cp(from, t
On Wed, 28 Mar 2012 13:12:30 -0700, John Ladasky wrote:
> I'm looking for a Python (2.7) equivalent to the Unix "cp" command.
> Since the equivalents of "rm" and "mkdir" are in the os module, I
> figured I look there. I haven't found anything in the documentation.
> I am also looking through the
On Wed, Mar 28, 2012 at 2:12 PM, John Ladasky
wrote:
> I'm looking for a Python (2.7) equivalent to the Unix "cp" command.
> Since the equivalents of "rm" and "mkdir" are in the os module, I
> figured I look there. I haven't found anything in the documentation.
> I am also looking through the Pyt
On Mar 28, 9:50 pm, alex23 wrote:
> On Mar 29, 6:12 am, John Ladasky wrote:
>
> > I'm looking for a Python (2.7) equivalent to the Unix "cp" command.
> > Any help? Thanks.
>
> Try the shutil module:http://docs.python.org/library/shutil.html
Many thanks! That's what I was looking for.
--
http:
I'm looking for a Python (2.7) equivalent to the Unix "cp" command.
Since the equivalents of "rm" and "mkdir" are in the os module, I
figured I look there. I haven't found anything in the documentation.
I am also looking through the Python source code in os.py and its
child, posixfile.py.
Any hel
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