"BJörn Lindqvist" <bjourne@gmail.com> wrote:
On 4/21/07, Terry Reedy <tjreedy@udel.edu> wrote:
But it *is* currently a problem for lists that will become much more extensive in the future, so it *is* currently a problem for sorted dicts that will be much more of a problem in the future. Hence, sorted dicts will have to be restricted to one type or one group of truly comparable types.
Alternatively, you could require a comparator function to be specified at creation time.
You could, but that would imply a total ordering on elements that Python itself is removing because it doesn't make any sense. Including a list of 'acceptable' classes as Terry has suggested would work, but would generally be superfluous. The moment a user first added an object to the sorted dictionary is the moment the type of objects that can be inserted is easily limited (hello Abstract Base Classes PEP!) - Josiah