I need to create an "interface" to my script such that (runs by crontab):

1. When --help, terminal will display a list of choices (well formatted, separate by \n)
2. allow multiple choices input (comma delimited)

e.g. (something like the following)

```
python feedAnimals.py --help 
...... Choices:
           dog
           cat
           fish

python feedAnimals.py --pets dog,cat,fish

```

Is there anyway to do this with `type="choices"`?
Or can I use `type="string"`? I tried to insert `\n` between choices under the "help" option, but these seems to be neglected at run time.

Must be python 2.4 compatible :(