On Mon, 14 Mar 2011 23:37:06 +0000, Nobody wrote: > On Mon, 14 Mar 2011 12:39:35 -0700, Paul Rubin wrote: > >> Finally I concocted an "infinite" example which we agreed is >> artificial: you are given a list of generators denoting real numbers, >> for example pi generates the infinite sequence 3,1,4,1,5,9... while e >> generates 2,7,1,8,... You can sort these with cmp but not with key. > > Is there some restriction on the return type of the key= function? If > not, you can define a class with appropriate comparison methods and have > key= return instances of that class.
You mean like this? http://docs.python.org/dev/library/functools.html#functools.cmp_to_key -- Steven -- http://mail.python.org/mailman/listinfo/python-list
