[_ZeD_]

They resolve differenti problems: say you have a list of complex object, and you wanna sort by an attribute, you can use

    mylist.sort(key=lambda element: element.attribute)

Elsewere, say you want to sort a non-omogeneous list, or according to a custom order (attribute1 descending, attribute2 ascending) cmp make this easy

[philh]

I think ve was saying, ve doesn't see the difference between python's `sort(key=...)` and perl6's `sort { one-arg block }`. (At any rate, I don't see that difference.)

[rmc]

Elsewere, say you want to sort a non-omogeneous list, or according to a custom order (attribute1 descending, attribute2 ascending) cmp make this easy

You can do this in python with the key function returning a list/tuple:

    mylist.sort(key=lambda element: (element.attribute1, -element.attribute2))

[_ZeD_]

I'm not sure you can do -"string" :)