Help with module “tkinter.ttk”

I am not sure how to find the “keys” for style options with the “tkinter.ttk” module and the “tkinter.ttk.Style” class. What are all the available keys, and what is the proper syntax? By the way, you may want or need to transfer this issue to a more “tkinter.ttk” specific issue tracker.

It might take a little searching, but there’s this: