HD TV Dimensions | Python Fiddle

from math import sqrt

class HDTV(object):
	global ar
	ar = 1.7778 # 16:9
	def __init__(self,diag1,diag2):
		self.diag1 = diag1
		self.diag2 = diag2
	def height(self):
		height1 = self.diag1/sqrt(1 + ar**2)
		height2 = self.diag2/sqrt(1 + ar**2)
		h = [height1,height2]
		return h
	def width(self):
		width1 = self.diag1/sqrt(1 + (1/ar)**2)
		width2 = self.diag2/sqrt(1 + (1/ar)**2)
		w = [width1,width2]
		return w
	def area(self):
		area1 = self.height()[0]*self.width()[0]
		area2 = self.height()[1]*self.width()[1]
		a = [area1,area2]
		return a
	def display(self):
		if self.diag2 == 0:
			print "----------------------------"
			print "Height 1 =", self.height()[0]
			print "Width 1 =", self.width()[0]
			print "Area 1 =", self.area()[0]
		elif self.diag1 == 0:
			print "----------------------------"
			print "Height 2 =", self.height()[1]
			print "Width 2 =", self.width()[1]
			print "Area 2 =", self.area()[1]
		elif self.diag1 != 0 and self.diag2 != 0 and self.diag1 > self.diag2:
			ratio = self.area()[1]/self.area()[0]
			print "----------------------------"
			print "Height 1 =", self.height()[0]
			print "Width 1 =", self.width()[0]
			print "Area 1 =", self.area()[0]
			print "----------------------------"
			print "Height 2 =", self.height()[1]
			print "Width 2 =", self.width()[1]
			print "Area 2 =", self.area()[1]
			print "----------------------------"
			print "% Diff =", 100*(1 - ratio)
		elif self.diag1 != 0 and self.diag2 != 0 and self.diag1 < self.diag2:
			ratio = self.area()[0]/self.area()[1]
			print "----------------------------"
			print "Height 1 =", self.height()[0]
			print "Width 1 =", self.width()[0]
			print "Area 1 =", self.area()[0]
			print "----------------------------"
			print "Height 2 =", self.height()[1]
			print "Width 2 =", self.width()[1]
			print "Area 2 =", self.area()[1]
			print "----------------------------"
			print "% Diff =", 100*(1 - ratio)

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