override this nested list

[dagap]

I have a configuration which I am defining as follows:

preprocessing

_target_: make_pipeline

steps_config: 
  - ColumnMapper:
      _target_: ColumnMapper
      columns: null
  - SeriesMaker:
      _target_: SeriesMaker
      time_column: null
      value_cols: null

Now, I want to specify these null fields from the command line. So, I tried something like:

'preprocessing.steps_config.1.value_cols=[x, y]'

Now, this comes back with

Could not override 'preprocessing.steps_config.1.value_cols'.
To append to your config use +preprocessing.steps_config.1.value_cols=[x,y]
`Key 'value_cols' is not in struct
    full_key: preprocessing.steps_config[1].value_cols
    object_type=dict`

I tried various combinations but it does not seem to see the final key in the dictionary.

[Jasha10]

Could not override 'preprocessing.steps_config.1.value_cols'.
To append to your config use +preprocessing.steps_config.1.value_cols=[x,y]
`Key 'value_cols' is not in struct
    full_key: preprocessing.steps_config[1].value_cols
    object_type=dict`

Have you tried using a plus symbol as suggested in the error message?

+preprocessing.steps_config.1.value_cols=[x,y]

[omry]

https://stackoverflow.com/a/71569308/1930838

[Jasha10]

Thanks Omry!