[Python-Dev] Issue 2736: datetimes and Unix timestamps

[Greg Ewing]

Terry Reedy wrote:

> "A rich comparison method may return the singleton NotImplemented if it 
> does not implement the operation for a given pair of arguments. By 
> convention, False and True are returned for a successful comparison. 
> However, these methods can return any value,"

That's to give the other operand a chance to handle
the operation. If they both return NotImplemented,
then a TypeError is raised by the interpreter.

-- 
Greg