#! python

def gen(n):
	for i in range(n):
		yield i
	print 'CLEANUP'


print "The user would expect 'CLEANUP' to be printed twice:"
print '4, 4'
zip(gen(4), gen(4))

print

print "The user might expect 'CLEANUP' to be printed twice:"
print '3, 4'
zip(gen(3), gen(4))

print

print "The user might expect 'CLEANUP' to be printed twice:"
print '4, 3'
zip(gen(4), gen(3))

print 'Overall, only half of the "CLEANUP" calls get executed.'


class withdel(object):
	def __init__(self):
		self.x = "huge data"
	
	def __del__(self):
		print "Deallocate huge data"