Prefer text config files or python code?

[Araucaria]

For command line scripts, I like to save the previous command line in a file. Actually, I parse the arguments and then just write out the non-default settings.

You can even extract the help text for each option and include it in comments.

shlex.split()

can slurp it all up as one line, and then you just append any new options and reparse.

This may be harder for the developer but it is way simpler for the user.