Setting the default value for --ckpt_path in Lightning CLI

[JRF63]

ckpt_path seems to be parsed differently that the rest of the arguments. This doesn't work:

class CustomCLI(LightningCLI):
    def add_arguments_to_parser(self, parser: LightningArgumentParser) -> None:
        parser.set_defaults(
            {
                "ckpt_path", "last"
            }
        )

and would return this error:

  File "C:\Users\User\.micromamba\envs\pytorch\Lib\site-packages\jsonargparse\_core.py", line 887, in set_defaults
    raise NSKeyError(f'No action for key "{dest}" to set its default.')
jsonargparse._namespace.NSKeyError: No action for key "ckpt_path" to set its default.