Moving cmp() somewhere other than builtins is not progress. IMO, it
needs to die off and the concept of it needs to disappear completely.
Code is better without it. Three-way comparisons are PITA to use --
their only virtue is as an optimization in the few cases where one
three-way test is cheaper to compute than two two-way tests.
The goal for 3.0 was to have one way to do it and thereby simplify the
language. Tucking it away in a module or writing a new decorator
defeats the purpose. It simply should die and go away.