New Python Version 3.9.18 can't be run in PyScripter

[Andreas Müller]

I'm using PyScripter for development with QGIS. After the last update of Python to version 3.9.18, PyScripter can't connect to the Python interpreter anymore. I can't get any error messages from PyScripter, so I also opened an issue on their repository (​https://github.com/pyscripter/pyscripter/issues/1289).

Checking if PyScripter works with a non OSGeo4W Python 3.9.18 (​https://github.com/adang1345/PythonWindows/blob/master/3.9.18/python-3.9.18-amd64-full.exe) was successful. So I think, there is something wrong/missing in the OSGeo4W-Version.

I wish I could provide any other test than running PyScripter to recreate the issue, but I did not find one yet.

[jef]

Is %OSGEO4W_ROOT%\bin in PyScripter's PATH?

[Andreas Müller]

I call Pyscripter with a batch-file, including all variables needed for plugin development and the path. The only thing, that changed, was Python switched to 3.9.18.

[jef]

Replying to Andreas Müller:

I call Pyscripter with a batch-file, including all variables needed for plugin development and the path. The only thing, that changed, was Python switched to 3.9.18.

So it is in PATH?

[Andreas Müller]

Sorry, yes, it is. Do You think of the redistributables?

[jef]

No, it's probably zlib.dll - which should be fetched from %OSGEO4W_ROOT%\bin, but for some reason isn't. Copying it to %OSGEO4W_ROOT%\apps\Python39 seems to help.

[jef]

Fixed in ​https://github.com/jef-n/OSGeo4W/commit/5b059bb57c3776a2801f57d8fc8ec60ea882bccf