Multiline lists are not parsed in config files the way I'd expect

[agyoungs]

Consider the program (test.py):

#! /usr/bin/env python3

import configargparse

def main():
    parser = configargparse.ArgumentParser()
    parser.add_argument('-c', '--config', is_config_file=True)
    parser.add_argument('--list', nargs='+')

    args = parser.parse_args()
    print(args)

if __name__ == "__main__":
    main()

With the config file (test.toml):

list = [
   1,
   2,
   3,
]

When running this you get an error. Presumably because the config parser is trying to allow for many different config formats at once.

> ./test.py -c test.toml
usage: test.py [-h] [-c CONFIG] [--list LIST [LIST ...]]
test.py: error: unrecognized arguments: --1,=true --2,=true --3,=true --]=true

If you change the list to one line instead, it works. With the caveat that the trailing , causes issues.

list = [1, 2, 3, ]

> ./test.py -c test.toml
Namespace(config='test.toml', list=['1', '2', '3', ''])

I know you can specify different config parsers. I haven't tried doing that, but if that works, would it not be a good idea to change the config parser to use a the correct config file parser based on known file types and revert to the default one if it doesn't recognize the file type?