from math import *

class Point:
    def __init__(self,initialX=10,initialY=20):
        self._x=initialX
        self._y=initialY

    def getX(self):
        return self._x

    def getY(self):
        return self._y

    def setX(self,val):
        self._x=val

    def setY(self,val):
        self._y=val

    def move(self,dx,dy):
        self._x +=dx
        self._y +=dy

    def distance(self,other):
        dx=self._x-other._x
        dy=self._y-other._y
        return sqrt(dx*dx+dy*dy)

    def __str__(self):
        return '('+str(self._x)+','+str(self._y)+')'
    

def main():

    p1=Point(30,40)
    p2=Point(40,60)

    print "Two points created so far, with coordinates",
    print '(',p1.getX(),',', p1.getY(), ')', 'and (', p2.getX(),',',p2.getY(),').'

    p1.move(10,20)
    p2.move(30,10)

    print 'Points were moved and their new coordinates are:',
    print '(',p1.getX(),',', p1.getY(), ')', 'and (', p2.getX(),',',p2.getY(),').'
    
    print 'The distance between these points is:',p1.distance(p2)


main()