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#!/usr/bin/python

class Point(object):
    def __init__(this, x=0, y=0):
        """Create new point object with given coordinate x, y"""

        # lets make some initial test

        #assert type(x) in (int, long, float)
        #assert type(y) in (int, long, float)
        if type(x) not in (int, long, float):
            raise TypeError
        if type(y) not in (int, long, float):
            raise TypeError

        this.x=x
        this.y=y
    def dist_from_orig(this):
        """This method returns distance from origin"""
        return (this.x**2+this.y**2)**0.5

    def dist_from(this, otherp):
        return ((this.x-otherp.x)**2 + (this.y-otherp.y)**2)**0.5

    def reflect_x(this):
        return (this.x, -this.y)

    def slop_from_orig(this):
        return float(this.y)/this.x

    def __str__(this):
        return "({0}, {1})".format(this.x, this.y)


def main():
    p1=Point(3, 17)
    p2=Point(4, 12)
    print p1.dist_from_orig()
    print p2.dist_from(p1)
    print p2.slop_from_orig()
    print p2

if __name__ == "__main__":
    main()

import unittest
import point

class TestPoint(unittest.TestCase):
    def setUp(self):
        self.p = point.Point(5, 12)
        self.q = point.Point(6, -1)

    def test_all_kinds_of_distance(self):
        self.assertEqual(self.p.dist_from_orig(), (5**2+12**2)**0.5)

    def test_for_bad_data(self):
        d={'x':2, 'y':3}
        self.assertRaises(TypeError, point.Point.__init__, **d)


if __name__ == "__main__":
    unittest.main(verbosity=2)

 def test_all_kind_of_distance(self):
        self.assertEqual(self.p.dist_from_orig(), (5**2+12**2)**0.5)

    def test_for_bad_data(self):
        d={'x':2, 'y':3}
        self.assertRaises(TypeError, point.Point.__init__, **d)