[Bug] Interpolation not possible in lists / tuples in config file about hydra

[odelalleau]

Yes, interpolations work. But if you print cfg.data_conf.cols you are printing a ListConfig object, which doesn't resolve interpolations by default. If you want to see the resolved fields, you can use for instance print(list(cfg.data_conf.cols)) or (more generally) use OmegaConf.to_container(cfg.data_conf.cols, resolve=True).

[MouradInan-betclic]

That's the answer I needed! Thank you very much! :)

[odelalleau]

This is not a bug. This is because when using ${.rate_at} you are using a relative interpolation at the same level as the current node, which means you are trying to interpolate to another element of the list (which won't work because the list has no element named rate_at). Instead you need to go one level higher in the config hierarchy, by using ${..rate_at}.

[MouradInan-betclic]

Hello, I also tried this one you mentioned but, I don't think the problem is there. The problem is when you are in a list elements, I'm not sure that interpolation works for this specific use case.
By the way with your solution, I have:
['A', 'B', 'C_${..rate_at}', 'D_${..rate_at}']

p.s:
I just realised that the print in python code should be
print(cfg.data_conf.cols)
sorry for that :)