How to write this json string as param in python command line?

Question

I'm writing qemu qga command through python script like this:

python cmd.py request:'{"execute": "guest-execute", "session": "4768", "arguments": {"commands": [{"command": "/bin/sh", "arguments": ["sh", "-c", "route | grep default | awk '{print $2}'"]}]}}'

but the param is parsed into bellow, which devide json string from '{print $2}' :

['cmd.py', 'request:{"execute": "guest-execute", "session": "4768", "arguments": {"commands": [{"command": "/bin/sh", "arguments": ["sh", "-c", "route | grep default | awk {print', '}"]}]}}']

actually I want this, which awk {print'{print $2}' is shell command running in vm, and this format could not change:

['cmd.py', 'request:{"execute": "guest-execute", "session": "4768", "arguments": {"commands": [{"command": "/bin/sh", "arguments": ["sh", "-c", "route | grep default | awk {print'{print $2}'}"]}]}}']

Is it possible? If it's impossible, it means I have to construct json string by hand in cmd.py?

Thank you~

You have to remove spaces and use backslash for your quotes. This way, your entire json string will be seen as just one argument. — iFlo
– iFlo, Commented Aug 11, 2017 at 9:25

Botje · Accepted Answer · 2017-08-11 09:33:08Z

1

You accidentally embedded single quotes in other single quotes: If I leave out the first part of the string you get the following:

request:'... | awk '{print $2}'"]}]}}'

Which the shell sees as three parts, and tries to resolve the $2 there:

request:'... | awk ' {print $2} '"]}]}}'

If you want to embed single quotes in other single quotes, you have to do it like this:

echo 'This string contains '\'' <- an embedded quote'

So in your case the full command should be

python cmd.py request:'{"execute": "guest-execute", "session": "4768", "arguments": {"commands": [{"command": "/bin/sh", "arguments": ["sh", "-c", "route | grep default | awk '\''{print $2}'\''"]}]}}'

answered Aug 11, 2017 at 9:33

Botje

32.2k4 gold badges36 silver badges47 bronze badges

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

Collectives™ on Stack Overflow

How to write this json string as param in python command line?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related