I tend to agree with the other folks here about storing your data as a config file.
You should provide an option to either display explicit information on how to create a config file if one does not exist, or (IMHO) better yet, provide an option for creating a config file programatically, with either sane defaults, or interspersed liberally with
.
And everyone here is right. If you think your script will only be around for a year or so, multiply by 10. Old software never dies...