declaring bash variable from parsing JSON with curl and python

Question

I have a URL endpoint that I want to retrieve a value from a JSON array. If I use the following in a linux command line, it works perfectly:

curl -s http://10.10.1.10/api/ping | python -c 'import sys, json; print json.load(sys.stdin)["service"]'

Where "service" is the member I'm trying to access. I get a valid output such as Collection Service I want to assign this output to a variable in a bash script.

#!/bin/bash
SERVICE= "$(curl -s http://10.10.1.10/api/ping)" | python -c 'import sys, json; print json.load(sys.stdin)["service"]'

However, this just gives me an error, saying that my JSON array is not a command.

Is this possible? What am I doing wrong?

Eric Renouf · Accepted Answer · 2015-03-29 03:18:35Z

4

You have some odd quoting and bracing in your example. I think if you just take the command that works to print the value you want and put it in $(...) you'll get what you want, so it would be like

SERVICE=$(curl -s http://10.10.1.10/api/ping | python -c 'import sys, json; print json.load(sys.stdin)["service"]')

answered Mar 29, 2015 at 3:18

Eric Renouf

14.6k3 gold badges53 silver badges73 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Martijn Pieters · Accepted Answer · 2015-03-29 03:15:35Z

4

You can use ` backticks to capture a value from a command:

SERVICE=`curl -s http://10.10.1.10/api/ping | python -c 'import sys, json; print json.load(sys.stdin)["service"]'`

or put the $(...) around the whole command; `...` and $(...) are equivalent here:

SERVICE=$(curl -s http://10.10.1.10/api/ping | python -c 'import sys, json; print json.load(sys.stdin)["service"]')

answered Mar 29, 2015 at 3:15

Martijn Pieters

1.1m326 gold badges4.2k silver badges3.4k bronze badges

Collectives™ on Stack Overflow

declaring bash variable from parsing JSON with curl and python

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related