Tutorial

from ailist import LabeledIntervalArray

ail = LabeledIntervalArray()
ail.add(1, 2, 'a')
ail.add(3, 4, 'a')
ail.add(3, 6, 'a')
ail.add(3, 6, 'b')
ail.intersect(3,6,"a")
#LabeledIntervalArray
#  (3-4, a)
#  (3-6, a)