I'm in the early stages of a migration project from ArcMap 10.8 to ArcPro 3.x. Moving the .mxds are not an issue, but we have a few .tbx files that were created for some customized projects (use/call Python 2.7 scripts with the toolbox taking in parameters).
I've used/am using the 2to3 conversion to migrate those scripts to Python 3.x, and was wondering if there was some way to programmatically convert the .tbx structure itself to an .atbx ... I thought ImportToolbox would be the way to go, but I may have been mistaken (got a 99998 error when I attempted). If the Toolbox needs to be rebuilt, that's fine, but it looks like you can import from 2.x to 3.x so I figured there might be a way to migrate from 10.8 to 3?