Python - Removing overlapping lists

Question

Say I have a list of lists that has indexes [[start, end], [start1, end1], [start2, end2]].

Like for example :

[[0, 133], [78, 100], [25,

Answer 1

In general, two intervals are overlapping if:

min([upperBoundOfA, upperBoundOfB]) >= max([lowerBoundOfA, lowerBoundOfB])

If this is the case, the union of those intervals is:

(min([lowerBoundOfA, lowerBoundOfB]), max([upperBoundOfA, upperBoundOfB])

Similarly, the intersection of those intervals will be:

(min([upperBoundOfA, upperBoundOfB]), max([lowerBoundOfA, lowerBoundOfB]))