[web2py] ordering the table reverse

[b vivek]

The docs mention it , but looks like there is some typo.. it is said that a
tilde has to be used but the example does not show it:-
This is what is in the docs:-

>>> for row in db().select(db.person.ALL, orderby=db.person.name):
        print row.name

But this would not reverse the table . Can someone please help...

Thanks

Vivek