Hiding shell output from subprocess.check_output ()
I get information about my wireless connection using
In [4]: subprocess.check_output('iwconfig')
eth0 no wireless extensions.
lo no wireless extensions.
Out[4]: 'wlan0 ...'
I get the line I want, but I would like to clear the shell of information about eth0
and lo
(note that these lines are not on the return line check_ouput
, they are printed to the shell between ipython In [4]
and Out [4]
).
My final guess is that these two lines are considered a warning and not caught check_output
. Hoping that they are output to stderr
, I tried several options
iwconfig > /dev/null 2>&1 # empties my wanted string
iwconfig 2 > /dev/null # throws an error
but without success so far.
How can I prevent check_output
shell output ?
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