creating addon system

[timo verbeek]

What is the easiest way in python to create a addon system?
I found to easy ways:
* using a import system like this:
       for striper in stripers:
        if striper["enabled"]:
            exec("from strip import %s as _x"%striper["striper"])
            string = _x.start(string)
* using exec
       for striper in stripers:
        if striper["enabled"]:
            use=open(stripper)
            exec(use)

Do you now is the best way?