#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Calculate the distance to a point.
     """
     #end_pymotw_header
     
     import math
     
     print '{:^8}  {:^8}  {:^8}  {:^8}  {:^8}'.format('X1', 'Y1', 'X2', 'Y2', 'Distance')
     print '{:-^8}  {:-^8}  {:-^8}  {:-^8}  {:-^8}'.format('', '', '', '', '')
     
     
     for (x1, y1), (x2, y2) in [ ((5, 5), (6, 6)),
                                 ((-6, -6), (-5, -5)),
                                 ((0, 0), (3, 4)), # 3-4-5 triangle
                                 ((-1, -1), (2, 3)), # 3-4-5 triangle
                                 ]:
         x = x1 - x2
         y = y1 - y2
         h = math.hypot(x, y)
         print '{:8.2f}  {:8.2f}  {:8.2f}  {:8.2f}  {:8.2f}'.format(x1, y1, x2, y2, h)