Python streams implementation sample

pystreams.py

def ones():
	return 1,lambda : ones()
def power_of_two(x=1):
	return x,lambda : power_of_two(x*2)
def fibonacci(xcurr=1,xlast=0):
	xnext = xcurr+xlast
	return xnext,lambda : fibonacci(xnext,xcurr)
def list_iter(l=[]):
	if len(l) == 0 :
		raise StopIteration
	return l[0],lambda :list_iter(l[1:]) 
if __name__ == '__main__':
	i = 0 
	s = ones
	print " ONES "
	while i < 11:
		x,s = s()
		print x
		i = i + 1 
	i = 0 
	print " POWER OF TWO "
	s = power_of_two
	while i < 10:
		x,s = s()
		print x
		i = i + 1 
	print " FIBONNACI "
	s = fibonacci 
	while i < 101:
		x,s = s()
		print x
		i = i + 1 
	l = [1,2,3]
	i = 0
	x,s = list_iter(l)
	while True:
		try:
			print x
			x,s = s()
		except StopIteration:
			break