python - Suppressing messages to terminal from spawned process -

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this question has answer here:

i've got command looks this

subprocess.popen('shp2pgsql -s 17932 \\storage1\dev1\gis\a.shp asmithe.mytable | psql -u asmithe -h example.org -d inventory -q', shell=true).wait()

heinous know. outputs screen , don't want that. how can supress it? psql has -q option quiet can't find simillar shp2pgsql

the easiest way capture stdout , stderr , send them devnull

(i'm using espeak 4; echo 'bye' test command; echo prints stdout , espeak, well, speaks have output isn't captured)

in [14]: p = subprocess.popen("espeak 4; echo 'bye'", shell=true, \              stdout=subprocess.devnull, stderr=subprocess.devnull).wait()  in [15]: p = subprocess.popen("espeak 4; echo 'bye'", shell=true).wait() bye

the other thing can send /dev/null, if you're on linux/unix machine

in [16]: p = subprocess.popen("echo 'bye' > /dev/null 2>&1", shell=true).wait()           # note: bash. works me on zsh well,          # might not work other variants of sh          # use command 2> /dev/null if want redirect stderr.

addendum: wait, you're using pipe, first command outputting stderr

for script, if linux commands alone, i'd write way:

subprocess.popen('shp2pgsql -s 17932 \\storage1\dev1\gis\a.shp asmithe.mytable 2> /dev/null | '     'psql -u asmithe -h example.org -d inventory -q', shell=true).wait()      #implicit string concat awesome breaking long lines

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