Passing Python JSON argument with whitespace

Question

I am trying to pass JSON as an argument to python script in command prompt. It works if the element in JSON does not have white spaces in value but it does not work if there are white spaces.

Here is script

import json, sys, traceback
    if(len(sys.argv)>1):
    print(sys.argv[1])
    jsonInput = json.loads(sys.argv[1]);
    print(jsonInput['name'])
    print(jsonInput['kingdom'])
    print(jsonInput['slogan'])

Passing below JSON as an argument in the power Shell. I have spaces in values e.g. Jon Snow

python C:\Users\user1\Desktop\myTest.py '{\"name\":\"Jon Snow\",\"kingdom\":\"Winterfell\",\"slogan\":\"King in the North\"}'

Output:

python : Traceback (most recent call last):
At line:1 char:1
+ python C:\Users\kiran.patil\Desktop\myTest.py '{\"name\":\"Jon Snow\" ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Traceback (most recent call last)::String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
  File "C:\Users\User\Desktop\myTest.py", line 5, in <module>
    jsonInput = json.loads(sys.argv[1]);
  File "C:\Program Files\Python38\lib\json\__init__.py", line 357, in loads
    return _default_decoder.decode(s)
  File "C:\Program Files\Python38\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Program Files\Python38\lib\json\decoder.py", line 353, in raw_decode
    obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Unterminated string starting at: line 1 column 9 (char 8)

Please any advise to fix it.

Answer 1

If you use \" it means the enclosing quotes are double quotes too. On windows the enclosing simple quotes doesn't work so the 2 options are

# Linux + Windows
python script.py "{\"name\":\"Jon Snow\",\"kingdom\":\"Winterfell\",\"slogan\":\"King in theNorth\"}"

# Linux only
python script.py '{"name":"Jon Snow","kingdom":"Winterfell","slogan":"King in theNorth"}'

Powershell case

python script.py '{""name"":""Jon Snow"",""kingdom"":""Winterfell"",""slogan"":""King in theNorth""}'