On Thu, 10 Jun 2010 08:40:03 -0700, Chris Seberino wrote:
> On Jun 10, 6:52 am, Nobody wrote:
>> Without the p1.stdout.close(), if the reader (grep) terminates before
>> consuming all of its input, the writer (ls) won't terminate so long as
>> Python retains the descriptor corresponding to p1.std
On 6/10/2010 11:40 AM, Chris Seberino wrote:
Even if zombies are created, they will eventually get dealt with my OS
w/o any user intervention needed right?
Bad approach. Years ago I inherited a server that didn't do a proper cleanup pf
its slaves. After a few days running, people discovered t
On Thu, Jun 10, 2010 at 4:52 AM, Nobody wrote:
>
> Also, "ls | grep" may provide a useful tutorial for the subprocess module,
> but if you actually need to enumerate files, use e.g. os.listdir/os.walk()
> and re.search/fnmatch, or glob. Spawning child processes to perform tasks
> which can easily
On 06/10/10 21:52, Nobody wrote:
> Spawning child processes to perform tasks
> which can easily be performed in Python is inefficient
Not necessarily so, recently I wrote a script which takes a blink of an
eye when I pipe through cat/grep to prefilter the lines before doing
further complex filteri
On Jun 10, 6:52 am, Nobody wrote:
> Without the p1.stdout.close(), if the reader (grep) terminates before
> consuming all of its input, the writer (ls) won't terminate so long as
> Python retains the descriptor corresponding to p1.stdout. In this
> situation, the p1.wait() will deadlock.
>
> The c
On 2010-06-10, Chris Seberino wrote:
> How do subprocess.Popen("ls | grep foo", shell=True) with shell=False?
You'll have to build your own pipeline with multiple calls to subprocess
> Does complex commands with "|" in them mandate shell=True?
Yes.
Hey, I
On Wed, 09 Jun 2010 21:15:48 -0700, Chris Seberino wrote:
> How do subprocess.Popen("ls | grep foo", shell=True) with shell=False?
The same way that the shell does it, e.g.:
from subprocess import Popen, PIPE
p1 = Popen("ls", stdout=PIPE)
p2 = Popen(["gr
On Wed, Jun 9, 2010 at 9:15 PM, Chris Seberino wrote:
> How do subprocess.Popen("ls | grep foo", shell=True) with shell=False?
I would think:
from subprocess import Popen, PIPE
ls = Popen("ls", stdout=PIPE)
grep = Popen(["grep", "foo"
How do subprocess.Popen("ls | grep foo", shell=True) with shell=False?
Does complex commands with "|" in them mandate shell=True?
cs
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