nargs=1 in argparse produces list instead of value

[volksen]

Hi,

thank for your great package. Exactly what I was looking for.
I think, I found a bug in commandline.py in the CliFlags class
You are using nargs=1 in Flags Save and log-level which produces a list instead of the value itself.
(see: https://docs.python.org/3/library/argparse.html#nargs)

When I run the following code on python 3.10.6 with the latest argparse and springs:
python app.py -l WARNING
I get the following error: TypeError: unhashable type: 'list'
Same happens with option -s for save.

Removing nargs=1 fixes the issue in my opinion.

[soldni]

Thank you @volksen for reporting this issue! Just fixed it in mainline and released 1.12.2 on PyPi.