I am working with following code in which I am trying to output co ordinates of overlapping rectangles.. However the code fails to output the co ordinates. I am customizing the following code This is the input

1.6 1.2 7.9 3.1
1.2 1.6 3.4 7.2
2.6 11.6 6.8 14.0
9.6 1.2 11.4 7.5
9.6 1.7 14.1 2.8

This is the code:
Code:
from __future__ import division
from collections import namedtuple
...