On 8/19/07, James Stroud <[EMAIL PROTECTED]> wrote: > This was the poor design I was hinting to. do_foobar is type-checking > for ticker. "Casting" as you might think of it does not exist in python. > Creating new objects based on the values of existing objects (lets call > it "conversion" for lack of a better name) does (e.g. int(2.0)). But > this is not casting. Unless you have the power to re-author all of the > do_foobar()s to not type-check, you should create an instance of ticker > and pass that: > > t = ticker(param1, param2, parametc) > [...] > anobj.do_foobar(t) > > The "got nothing instead" means that you should have passed an > argument--and unfortunately whoever authored do_foobar() type-checked > for a ticker, which is not a desirable way to design an API.
I designed the system using this 'tutorial' http://lucumr.pocoo.org/blogarchive/python-plugin-system With your help and revisiting the article I figured out that this call works: >>> for plugin in get_plugins_by_capability('do_foobar'): plg=plugin() print plg.do_foobar() -- Thanks, Joe -- http://mail.python.org/mailman/listinfo/python-list
