[Tutor] os.popen

[Klas Marteleur]

Ok i used popen3 instead, reading the "child-stderr" instead and it worked.
>>> tcextract = os.popen3("tcextract -v")
>>> tcextract[2].readlines()
['tcextract (transcode v0.6.12) (C) 2001-2003 Thomas Oestreich\n']

Thanks Hugo

Regards Klas

söndagen den 28 november 2004 19.26 skrev du:
> Hi Klas,
>
> Maybe the output you're trying to get is in STDERR and not STDOUT?? I've
> had to deal with this a number of times, so may I wrote a Tkinter script
> to let me know what output is to STDERR and what is to STDOUT. os.popen
> will open STDOUT if invoked with "r" (which is the default).
>
> Try looking of other popen* functions. They provide STDOUT + STDERR
> (popen4) or separate STDOUT + STDERR (popen3)
>
> BTW< if you'd like to have my script (the Streamshower, I call it =) )
> just email me ...
>
> Hugo
>
> Klas Marteleur wrote:
> > Hi
> > I have a little problem that is confusing me.
> >
> > If i write the following in a bash shell i get the desired output:
> > [klas at h180n2fls32o849 klas]$ kwrite -v
> > Qt: 3.2.3
> > KDE: 3.2 BRANCH >= 20040204
> > KWrite: 4.2
> >
> > It also works in a python shell...
> >
> >>>>os.popen("kwrite -v").readlines()
> >
> > ['Qt: 3.2.3\n', 'KDE: 3.2 BRANCH >= 20040204\n', 'KWrite: 4.2\n']
> >
> > If i try the following in a bash shell, it also workes:
> > [klas at h180n2fls32o849 klas]$ tccat -v
> > tccat (transcode v0.6.12) (C) 2001-2003 Thomas Oestreich
> >
> > But if i try the same in a python shell i get:
> >>>>os.popen("tccat -v").readlines()
> >
> > []
> >
> > Not even if i specify the path it works.
> >
> >>>>os.popen("/usr/bin/tccat -v").readlines()
> >
> > []
> >
> >
> > What am i missing?
> >
> > Kind Regards
> > Klas
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