Lecture Notes on 25 Jan 2017

import math

class Point (object):
  # constructor 
  def __init__ (self, x = 0, y = 0):
    self.x = x
    self.y = y

  # get distance
  def dist (self, other):
    return math.hypot (self.x - other.x, self.y - other.y)

  # get a string representation of Point
  def __str__ (self):
    return '(' + str(self.x) + ", " + str(self.y) + ")"

  # test for equality
  def __eq__ (self, other):
    tol = 1.0e-16
    return ((abs (self.x - other.x) < tol) and (abs(self.y - other.y) < tol))

def main():
  # create Point objects
  pointA = Point ()
  pointB = Point (3, 4)

  # print the coordinates of the points
  print (pointA)
  print (pointB)

  # find the distance between the points
  print (pointA.dist(pointB))
  print (pointB.dist(pointA))

main()