#exception handling in python
def sum_fun():
	try:
		#should contain normals operations / statements
		1/0
	except :
		#this part will be execute, if there is an error in try part.
		print "Oops!!! Invalid"
	else:
		#if try doesn't contain any errors this will be executed.
		print 'No error'
	finally:
		#This will be executed always - regardless of whether there is error in try part or not.
		print "Let's go home "

#calling the function.
sum_fun()