Python escaping sed and bash command with subprocess -


question:

how use sed python successfully? have run command on remote server list of comma delimited hosts. when ran bash want host1, host2, host3

here have:

process = subprocess.popen(["ssh $user@mychefserver knife search node "chef_environment:*" | grep -i "node name" | egrep -i "stuff|ruff" | uniq -u | sort -n | cut -d ":" -f 2 | sed -e 's/^[ \t]*//' | tr '\n' ', ' "], shell=false, stdout=pipe)

i know i'll have escape \n, \t, etc, i'm having trouble rest. whenever try run python script error invalid syntax though i've tried cornucopia of escapes.

you string quoting broken use " inside double quoted string. have escape " \". further note, of double quotes in command line can replaced single quotes '. following code should work:

process = subprocess.popen(["ssh $user@mychefserver knife search node \"chef_environment:*\" | grep -i 'node name' | egrep -i 'stuff|ruff' | uniq -u | sort -n | cut -d':' -f 2 | sed -e 's/^[ \t]*//' | tr '\n' ', '"], shell=false, stdout=subprocess.pipe)

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