[Feature Request] Concatenating parameter sweeps about hydra

[gil2rok]

Great idea! +1

[libokj]

It does sound like a pretty general solution to all those paired sweep problems. It's been a pain to create extra sweep configs to accommodate those sweeps for me, where I need to pair a pytorch lightning model checkpoint to its model config file. For better parsing and look, maybe using a list of dictionaries should be considered? Also, correct me if I'm wrong - I thought spaces were not allowed in a sweep variable, that it must be purely comma-seperated? If this solution becomes widely accepted, I'd be more than happy to help with implementation.

hydra:
  mode: MULTIRUN
  sweeper:
    params:
      - variable1: 1,5,8,19,32
        variable2: 0,1,800,1000,3000
        variable3: true
      - variable1: 0
        variable2: -1,-2,-3
        variable3: false