Remove Python 2.7 legacy: Update JSONDecodeError exception handling

[Prashant-thakur77]

Fixes #13889

Summary

This PR removes Python 2.7 legacy code by updating JSON parsing exception handling from ValueError to json.JSONDecodeError. The changes make exception handling more specific and remove outdated compatibility code.

References

Fixes #13889

Reviewer guidance

• Review the specific file changes to ensure only JSON parsing-related ValueError instances were updated
• Verify that the exception handling logic remains the same, only the exception type changed
• Confirm that Python 2 compatibility comments have been removed

Files changed:

• kolibri/core/device/management/commands/provisiondevice.py
• kolibri/plugins/init.py
• kolibri/core/public/api.py
• kolibri/core/fields.py

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.19.0b2.dev0_git.68.g798d59ad.pex
Windows Installer (EXE)	kolibri-0.19.0b2.dev0+git.68.g798d59ad-windows-setup-unsigned.exe
Debian Package	kolibri_0.19.0b2.dev0+git.68.g798d59ad-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.19.0b2.dev0+git.68.g798d59ad.dmg
Android Package (APK)	kolibri-0.19.0b2.dev0+git.68.g798d59ad-0.1.6-debug.apk
Raspberry Pi Image	kolibri-pi-image-0.19.0b2.dev0+git.68.g798d59ad.zip
TAR file	kolibri-0.19.0b2.dev0+git.68.g798d59ad.tar.gz
WHL file	kolibri-0.19.0b2.dev0+git.68.g798d59ad-py2.py3-none-any.whl

[rtibbles]

All these changes look good, there were two more instances of this kind of Py2.7 compatibility issue that I found: https://github.com/learningequality/kolibri/blob/develop/kolibri/core/discovery/utils/network/client.py#L228

Lastly, this is another attempt at the same issue, just disguised in a different way! https://github.com/learningequality/kolibri/blob/develop/kolibri/core/content/utils/content_manifest.py#L16 - just switching this to the import without the try except should be sufficient.

[Prashant-thakur77]

All these changes look good, there were two more instances of this kind of Py2.7 compatibility issue that I found:

@rtibbles
Thanks for pointing those out! I've updated both files:

kolibri/core/content/utils/content_manifest.py : Removed the try-except import block and changed to direct import: from json import JSONDecodeError
kolibri/core/discovery/utils/network/client.py : Removed ValueError from the exception tuple, now catching only requests.exceptions.JSONDecodeError

[rtibbles]

Excellent work @Prashant-thakur77 - thank you!