from collections import namedtuple
Point = namedtuple('Point', ['x', 'y'])
pt1 = Point(1.0, 5.0)
pt2 = Point(2.5, 1.5)

from math import sqrt
line_length = sqrt((pt1.x-pt2.x)**2 + (pt1.y-pt2.y)**2)
print(line_length)
