Python API - SetRenderSettings(...) - set macro in Filename?

I'm using the Python API in Resolve 16.

I'd like to set the name of the output file in the render settings (in the deliver tab).

This is easily done with the command

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project.SetRenderSettings({'CustomName':'the name that I want'})

However, I would like to add a few macro's in the filename. In the GUI they are available by typing "%<macro name>", for instance "%Scene", so that the Scene number that's in the clip's metadata ends up in the filename.

I can't find a way to do this in Python... using "%Scene" doesn't work. I find no pointers in the documentation on how to do this. Does anyone know how to do this?

I haven't tested it in Python but try escaping it with another %:
"%%Scene"

You should be able to access these values by calling GetMetadata() on a media pool item.

Found the answer to my own question... posting for future reference:

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project.SetRenderSettings({'CustomName':'%{Scene}_%{Take}'})

does the trick.