Module ‘encodings’ not found error when installing the dependencies

[robhubi]

My System

OS Microsoft Windows 10 Pro 64bit version 10.0.19045 Build 19045
Python version 3.12.4
OSC tools from 28. Juni 2024

Description

After the Python update to version 3.12, I also updated the KartaView upload scripts. However, the creation of the virtual environment failed. Error message: ModuleNotFoundError: No module named ‘encodings’.

Steps to Reproduce

1. start OSGeo4W shell as admin
2. enter commands:

cd /d P:\KartaView\upload-scripts-master
pip3 install virtualenv
virtualenv -p python3 .
scripts\activate.bat
pip3 install -r requirements.txt

The last line results in:

Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

See also log file KVI01_Log01.txt

Workaround:

The error disappears if the environment variable PYTHONHOME is set explicitly

set PYTHONHOME=P:\OSGeo4W64\apps\Python312
pip3 install -r requirements.txt

The installation then runs without errors. However, no images can be uploaded, the same error occurs here too. See log file
KVI01_Log02.txt .

Explicitly setting PYTHONHOME can also fix the ModuleNotFound error here, but images still cannot be uploaded. However, this is a different issue.

I don't understand why I have to set PYTHONHOME explicitly now, my previously used version of the tools (from 17 January 2023) worked without it.

[robhubi]

I have now tested it:
The same problem occurs with the previous version of the upload-scripts, which did not cause me any problems with Python version 3.9.5. I am very unsure where the problem is located.