a6_2.py

class Point(object):
	"""Represents a point in 2-D space."""

class Rectangle(object):
	"""Represents a rectangle

	attributes: width, height, corner.
	"""

def create_rectangle(x, y, width, height):
	pt = Point()
	pt.x = x
	pt.y = y
	r = Rectangle()
	r.width = width
	r.height = height
	r.corner = pt
	return r

def area_difference(r1, r2):
	area1 = r1.width * r1.height
	area2 = r2.width * r2.height
	return area1 - area2

r1 = create_rectangle(10, 20, 10, 10)
r2 = create_rectangle(20, 50, 15, 20)
print area_difference(r1, r2)