change a json value with a Python 3.8 script

Question

I want change one json value with a Python 3.8 script.

I know in Python, strings are immutable, so you can't change their characters in-place.

This helps my much: How to find and replace a part of a value in json file

TypeError: 'str' object does not support item assignment

TypeError: 'str' object does not support item assignment item['hotKey'] = "" TypeError: 'str' object does not support item assignment

Script: `item['hotKey'] = "<f11>"`

from pathlib import Path
import json
home = str(Path.home())
path = home + "/.config/autokey/data/Sample Scripts/"
jsonFilePath = home + "/.config/autokey/data/Sample Scripts/.run-run-lintalistAHK-all.json"
with open(jsonFilePath) as f:
    data = json.load(f)
for item in data['hotkey']:
    item['hotKey'] = "<f11>"  # item['hotKey'].replace('$home', item['id'])
with open(jsonFilePath, 'w') as f:
    json.dump(data, f)

json file

{
     "hotkey": {
         "hotKey": "<f12>"
     },
}

You just want `data["hotKey"]["hotKey"] = ""`, no need to loop. — progmatico, Nov 07 '20 at 13:19
You never change a string. You assign a new string, a literal, or built in some way. — progmatico, Nov 07 '20 at 13:21
btw Your `item` variable is, in turn, each of the keys (ie a string). — quamrana, Nov 07 '20 at 15:52

score 2 · Accepted Answer · answered Nov 07 '20 at 13:26

2

You need to add json['hotkey'] reference before:

for item in data['hotkey']:
    data['hotkey'][item] = "<f11>"  # item['hotKey'].replace('$home', item['id'])

My raw attempt:

import json
j = '''
{
     "hotkey": {
         "hotKey": "<f12>"
     }
}
'''
data = json.loads(j)
for x in data['hotkey']:
  data['hotkey'][x] = '<f11>'
print(data)

answered Nov 07 '20 at 13:26

Wasif

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This is OK, but (again) I doubt he really wants to change all the hotkeys to the same key. – progmatico Nov 07 '20 at 13:39
1

Upvoting assuming this is just for example. – progmatico Nov 07 '20 at 13:42
Both snippets change all the values to `""` regardless of what the keys are. – quamrana Nov 07 '20 at 15:52
@quamrana my solution change only one value and its works: https://i.imgur.com/4K5qkVv.png – SL5net Nov 07 '20 at 16:31
2

Yes, thats right, because you have used the solution from @progmatico and not the looping code in this answer. – quamrana Nov 07 '20 at 16:33

change a json value with a Python 3.8 script

TypeError: 'str' object does not support item assignment

Script: item['hotKey'] = "<f11>"

1 Answers1

Script: `item['hotKey'] = "<f11>"`