Overrides a list containing elements with quotes

[jayleicn]

How do we overide a list containing elements with quotes, the example below will raise hydra.errors.OverrideParseException: no viable alternative at input '[date\='2023-10-10''

$ python my_app.py debug=false "test.cfg_list=[date='2023-10-10',set_name=train]"

test:
  cfg_list:
    - date='2023-10-09'
    - set_name='val'

[odelalleau]

Use

"test.cfg_list=['date=\\'2023-10-10\\'','set_name=train']"

Explanation:

• Double quotes around everything so the shell doesn't interpret the []
• Single quotes around each element of your list because these strings contain the = character which is not allowed in unquoted strings in Hydra's overrides grammar
• Since you want a single quote in a single quoted string, you need to escape it in Hydra's overrides grammar, i.e. Hydra must see the string \'. The backslash character needs to be escaped for the shell ==> each single quote becomes \\'