Message 77868 - Python tracker

> (...) totimestamp() (...) return value should be similar
> to that of time.time(), i.e. a float

float is a source of many problems (rounding problems), especially for 
huge values: float is unable to store correctly microseconds for big 
values: see msg75426. A simple tuple (int, int) is simple and there is 
no rounding/float limit.