Could you give an example? Do you mean something like > [ manager.name for manager in set([ person.manager for person in employees ])] ? I assume wi

Could you give an example? Do you mean something like > [ manager.name for manager in set([ person.manager for person in employees ])] ? I assume with something like set() or unique() you need to create the intermediate iterable anyway, but without it I have trouble finding an example where doing a single list comprehension wouldn't suffice.