[web2py] URL Helper.

[David]

I think it would be a worthwhile feature to be able to get information 
from a URL helper object.

For example,
If we create a tuple of URL objects, and we want to loop through them, 
we may want to be able to extract things like vars and args that were 
set when the object was created.

ie:

urls = 
(URL('default','action',args=['arg1','arg2']),URL('default','action',args=['arg1','arg2']))

now I want to do something like

for url in urls:
    print url.function


This obviuosly does not work.