`default_env=True` still conflicts `default_config_files`.

[ljw20180420]

default_env=True still conflicts default_config_files. This related to #465 and #466. The default_env_bug.py python file is

import jsonargparse

parser = jsonargparse.ArgumentParser(
    description="Test.",
    default_config_files=["default_env_bug.yaml"],
    default_env=True,
)
parser.add_argument("--val0")
subcommands = parser.add_subcommands()
cmd1 = jsonargparse.ArgumentParser()
cmd1.add_argument("--val1")
subcommands.add_subcommand("cmd1", cmd1)
cmd1_subcommands = cmd1.add_subcommands()
cmd2 = jsonargparse.ArgumentParser()
cmd2.add_argument("--val2")
cmd1_subcommands.add_subcommand("cmd2", cmd2)

args = parser.parse_args()
print(args)

Run

python default_env_bug.py

Output

usage: test.py [-h] [--val0 VAL0] {cmd1} ...
error: Validation failed: Subcommand 'cmd1' does not accept nested key 'cmd2.cmd2.val2'

• jsonargparse version: 4.40.0
• Python version: 3.11.13
• How jsonargparse was installed: conda install conda-forge::jsonargparse
• OS: ubuntu 24.04

The default_env_bug.yaml file is

val0: 0
cmd1:
  val1: 1
  cmd2:
    val2: 2

[mauvilsa]

Thank you for reporting! I will take a look.

[mauvilsa]

This seems to be related to #738. Subcommands behaviors that were implemented for command line arguments are being used for default configs. The fact that `default_env' changes things is a different weird behavior, but still likely related.

I had not thought about this before, but subcommands should always be specified through command line, not implicitly taken from defaults. Running python default_env_bug.py should fail asking the user to provide the first subcommand.

[ljw20180420]

Thank you! Run

python default_env_bug.py

just works as long as you comment default_env=True,. Subcommand can be specified in config file. In fact, I follow the guide here.

Because the global config file always needs a default subcommand, my workaround is to add a dummy subcommand, e.g. help. Set this dummy subcommand as the default in the global config. Also, I use separate config file for other real subcommands. The structure is like this.

python prog.py --config global_config.yaml subcmd --config subcmd_config.yaml

This avoids put default settings of all subcommands in the global config file, which does not work as show in #738.