Wait for a system command executed in the background
Hello
I am new to python and I am really a bad programmer...
As a linux user, I use quodlibet for listening to music. Quodlibet
allows me to write plugins in python.
I am trying to write a plugins to burn a playlist by using cdrecord, and
this either in dao or tao mode.
The basic of this plugin is the following:
- make a temp directory
- convert the songs in my playlist into wave files in the temp directory
using mplayer and renaming them with 3 digits number so that the order
of my playlist is conserved
- normalize the wave files
- burn the cd
- delete the temp directory.
At the time, I have a working solution (not fully developped by
myself...), but in this solution os.system is used to start the
different shell commands and the commands do not have a & at the end.
Therefore during the whole execution of the plugin, quodlibet is not
responsive.
What I would like to is program the whole such that I can use & at the
end of the shell commands and each command to be executed one after the
other! (I tried to put & simply at the end of each shell command with
the result that each where started at the same time)
Here is the plugin:
###
import os, string, re
import util
import sys
import shutil
from qltk import ErrorMessage
from shutil import copy
from plugins.songsmenu import SongsMenuPlugin
class _Base(SongsMenuPlugin):
PLUGIN_ICON = 'gtk-cdrom'
PLUGIN_VERSION = '0.1'
# XXX : pb potentiel: si deux utilisateurs utilisent ce plugin
# en meme temps, ils vont se marcher sur les pieds...
destdir = "/tmp/cd_QL"
convert_cmd = "mplayer -ao pcm:file=%(dest)s %(source)s"
normalize_cmd = "normalize -m %(path)s/*.wav"
burn_cmd = "cdrecord -v -eject %(flags)s -pad -audio
%(path)s/*.wav"
burn_flags = ''
def plugin_songs(self, songs):
if not self.check_mplayer():
return
self.setup()
try:
try:
for num, song in enumerate(songs):
self.makewav(song, num)
self.normalize()
self.burn()
except Exception, e:
ErrorMessage(
None,
"Unknown error",
"An error occured while processing files:\n%s." % e
).run()
finally:
self.teardown()
def check_mplayer(self):
if not util.iscommand("mplayer"):
ErrorMessage(
None,
"Mplayer not found",
"Mplayer is used to convert files in wave files."
).run()
return False
return True
def setup(self):
os.mkdir(self.destdir)
def makewav(self, song, num):
source = song['~filename'].replace(" ", "\
").replace("'","\\'")
dest = os.path.join(self.destdir, "%03d.wav" % num)
cmd = self.convert_cmd % dict(source=source, dest=dest)
os.system(cmd)
def normalize(self):
os.system(self.normalize_cmd % dict(path=self.destdir))
def burn(self):
flags = self.burn_flags
cmd = self.burn_cmd % dict(path=self.destdir, flags=flags)
os.system(cmd)
def teardown(self):
shutil.rmtree(self.destdir)
class DAO(_Base):
PLUGIN_ID = 'Burn CD w/o blanks'
PLUGIN_NAME = _('Burn CD w/o blanks')
PLUGIN_DESC = 'Burn CD w/o blanks.'
burn_flags = '-dao'
class TAO(_Base):
PLUGIN_ID = 'Burn CD with blanks'
PLUGIN_NAME = _('Burn CD with blanks')
PLUGIN_DESC = 'Burn CD with blanks.'
# on exporte seulement ces deux classes
__all__ = ['DAO', 'TAO']
#
and yeah, please consider that I am new to python and do understand
something to the thread!
Thanks in advance
--
Brice
Arch Linux (Linux user nb. 372699)
-
"Unix IS user friendly, it is just selective about who his friends are"
--
http://mail.python.org/mailman/listinfo/python-list
Re: Wait for a system command executed in the background
On 2006-11-05, Dennis Lee Bieber <[EMAIL PROTECTED]> wrote:
> On Sun, 5 Nov 2006 18:32:39 +0100, Brice
><[EMAIL PROTECTED]> declaimed the following in
> comp.lang.python:
>
>
>>
>> At the time, I have a working solution (not fully developped by
>> myself...), but in this solution os.system is used to start the
>> different shell commands and the commands do not have a & at the end.
>> Therefore during the whole execution of the plugin, quodlibet is not
>> responsive.
>>
> Might it not be easier to just write each of those commands to a
> temporary file, then at the end submit that file as a shell script that
> runs in the background? {Maybe the last command should be one the
> deletes the file itself?}
>
At the time being I don't see other possible solution. Let's see if
someone else's got an idea.
Thx
--
Brice
Arch Linux (Linux user nb. 372699)
-
"Unix IS user friendly, it is just selective about who his friends are"
--
http://mail.python.org/mailman/listinfo/python-list
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Le jeudi 18 décembre 2014 11:46:00 UTC, Burak Arslan a écrit : > On 12/18/14 11:58, brice DORA wrote: > > hi to all I am new to python and as part of my project I would like to > > create a SOAP web service. for now I've developed my python file with all > > the methods of my future web service, but my problem now is how to generate > > the wsdl file ... my concern may seem to move so bear with me because I am > > a novice in this field. thank you in advance > > > Hi, > > You can use Spyne to generate the wsdl file. > > http://spyne.io/docs/2.10/manual/02_helloworld.html > https://github.com/arskom/spyne/blob/master/examples/helloworld_soap.py > > There's also s...@python.org for your soap-specific questions. > > best, > burak okey thanks u but this example use a simple method then in my case i have already my python file which contains all methods of my web service. so do you give a example or tell me how i can do it... i want to create the web service and deploying it from my python file...thanks very much in advance -- https://mail.python.org/mailman/listinfo/python-list
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Re: how to create a soap enveloppe with python suds for consume a bssv web service
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How can i use a dictionnary
i consume a web service that return a element whose the type is "instance". but
this element seem be a dictionary but when i want to use it like a dictionary,
i got some errors. so this is the element and please someone can tell me how
can i use it. tkanks in advance.
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sISOCode = "CI"
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--
https://mail.python.org/mailman/listinfo/python-list
Re: How can i use a dictionnary
Le mardi 13 janvier 2015 14:56:24 UTC, Novocastrian_Nomad a écrit :
> On Tuesday, January 13, 2015 at 2:03:30 AM UTC-7, brice DORA wrote:
> > i consume a web service that return a element whose the type is "instance".
> > but this element seem be a dictionary but when i want to use it like a
> > dictionary, i got some errors. so this is the element and please someone
> > can tell me how can i use it. tkanks in advance.
> >
> >
> > (tCountryInfo){
> >sISOCode = "CI"
> >sName = "Côte D'Ivoire (Ivory Coast)"
> >sCapitalCity = "Yamoussoukro"
> >sPhoneCode = "225"
> >sContinentCode = "AF"
> >sCurrencyISOCode = "XOF"
> >sCountryFlag =
> > "http://www.oorsprong.org/WebSamples.CountryInfo/Images/Côte D'Ivoire.jpg"
> >Languages =
> > (ArrayOftLanguage){
> > tLanguage[] =
> > (tLanguage){
> >sISOCode = "fr"
> >sName = "French"
> > },
> > }
> > }
>
> This data is not a Python dictionary, nor is it a JSON object. You will
> probably need to code your own conversion function to make it a Python
> dictionary.
thanks for your help but can you give a example that's you tell about my own
conversion funcion. thanks in advance
--
https://mail.python.org/mailman/listinfo/python-list
Re: How can i use a dictionnary
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