When are bisect_left and bisect_right not equal?

Question

In my understanding, bisect_left and bisect_right are two different ways of doing the same thing: bisection, one coming from the left and the other coming from the right. Thus,

Answer 1

When the target to locate is in the list, bisect_left, bisect_right return different result.

For example:

>>> import bisect
>>> bisect.bisect_left([1,2,3], 2)
1
>>> bisect.bisect_right([1,2,3], 2)
2