Problems with not having exceptions crash my script

[league55]

I just read a bit about sys_exc.info in the Python Documentation. It looks I'll have to pull the decorator from the helpers library and set up a separate exceptions library. This is a bit disheartening because I'm getting horribly sidetracked in developing the url_validator library--which was itself getting sidetracked from developing a urllib.requests library--which is itself getting sidetracked from the application I want to create. I'm not sure whether I should shelve exception handling until I've got the more important and interesting parts of the application complete. What do you think?