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?

[tristanlatr]

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?

We introduced to CompositeConfigParser for that, it can handle several types of parsers