Are there any modules for manipulating elapsed times, e.g. the time it took to run around a 400m track - 48.67 seconds, or the time it took to run a mile - 4:02.23. These times have no dependence on date. There are plenty of modules out there for manipulating "date times," but I can't find any for elapsed times. I am looking for something that could store elapsed times as an object, display the time in various formats, and perform various computations on the times.