I don't see Python mode available on Contribution Manager for download in Processing 3.5.4 and 4.0b1. on Windows 10?
I’ve reported the issue. Hopefully it’s resolved soon.
In the mean time, you can download the files you need here – https://raw.githubusercontent.com/tabreturn/processing.py-for-processing-4/main/PythonMode-for-Processing3.zip
In your Documents folder on Windows, there should be a folder named Processing; inside that is another folder named modes. Copy the PythonMode folder (in the downloaded zip archive) into modes. Python mode is available next time you run Processing.
* Use Processing 3.5.4 (not Processing 4) for Python mode.
Thanks. It is resolved this time.
Python Mode has reappeared in the Contribution Manager window 😄