def get_time_interval(lst: KQMLList) -> tra.TimeInterval:
try:
lb = lst.gets('lower-bound')
ub = lst.gets('upper-bound')
unit = lst.gets('unit')
return tra.TimeInterval(lb, ub, unit)
except Exception as e:
raise tra.InvalidTimeIntervalError(e)
def test_time_interval():
tra.TimeInterval(2.0, 4.0, 'second')