How to use is_interpolation on nested config?

[merelcht]

With a configuration like this:

cfg = OmegaConf.create({
   "foo" : 10,
    "bar": {
          "bla":"${foo}"
      }
   })

How can I check if my key "bla" has an interpolation value or not? I've tried all of the following:

• OmegaConf.is_interpolation(cfg, "bar.bla")
• OmegaConf.is_interpolation(cfg, "bar:bla")
• OmegaConf.is_interpolation(cfg, "bar[bla]")

But all of those return "False", where I'm expecting to get "True".

[omry]

You need to operate on the parent Node.
Something like:

OmegaConf.is_interpolation(cfg.bar, "bla")

If you want to drill in programmatically , you can use OmegaConf.select to select the parent node first:
e.g, to check if foo.bar.baz.biz is an interpolation:

node = OmegaConf.select(cfg, "foo.bar.baz")
OmegaConf.is_interpolation(node, "biz")

[merelcht]

Thanks for the quick response @omry !

[omry]

Happy to help.
Feel free to ping me about Kedro and Hydra.
While I am not very actively involved I still care about it greatly and would love to see it get adopted by more frameworks.