Sorting a list with entries of unequal types

[Ben Finney]

Howdy all,

Python 2.6 tells me that, in Python 3, sorting a list with entries of
incompatible types is not allowed:

=====
$ python2.5 -c "foo = [1, True, 'green', 4, -27, 15.3]; foo.sort(); print foo;"
[-27, 1, True, 4, 15.300000000000001, 'green']

$ python2.6 -c "foo = [1, True, 'green', 4, -27, 15.3]; foo.sort(); print foo;"
[-27, 1, True, 4, 15.300000000000001, 'green']

$ python2.6 -3 -c "foo = [1, True, 'green', 4, -27, 15.3]; foo.sort(); print foo;"
-c:1: DeprecationWarning: comparing unequal types not supported in 3.x
[-27, 1, True, 4, 15.300000000000001, 'green']
=====

So how should I be sorting a list with entries of “unequal types” such
that it will work in Python 3?

-- 
 \            “The idea that He would take his attention away from the |
  `\       universe in order to give me a bicycle with three speeds is |
_o__)  just so unlikely that I can't go along with it.” —Quentin Crisp |
Ben Finney