Macbook Touch Bar and Tkinter

Hi!

I have developed a Python IDE in Tkinter (https://thonny.org). My users 
say that when they configure their Macs to show function keys on Touch 
bar when Thonny is active, nothing actually happens 
(https://github.com/thonny/thonny/issues/683).

They say this feature works fine in IDLE.

I looked through 
https://github.com/python/cpython/blob/master/Lib/idlelib/macosx.py, but 
couldn't find anything special IDLE does to make it work.

Do you know if this issue is related to Tk at all? Any ideas how to fix 
this? I didn't find anything special in 
https://github.com/python/cpython/blob/master/Mac/IDLE/IDLE.app/Contents/Info.plist 
either (here's corresponding Thonny's file: 
https://github.com/thonny/thonny/blob/master/packaging/mac/Thonny.app.initial_template/Contents/Info.plist)

best regards,
Aivar