--file: Unzip.txt--
--file start--
---code start---
def unzip(l,*jj):
	'''Returns one or more of the elements in the tuples of l that were
zipped together.
	'''
	#
	# This code will unzip lists which have been zipped together.
	# If you created a zipped list, l=zip(a,b,c), you can use unzip
	# to extract one or more of the lists:
	# 	a,b,c=unzip(l)
	# 	b=unzip(l,1)
	# 	a,c=unzip(0,2)
	#
	# Christopher P. Smith 7/13/2001
	#
	if jj==():
		jj=range(len(l[0]))
	rl = [[li[j] for li in l] for j in jj] # a list of lists
	if len(rl)==1:
		rl=rl[0] #convert list of 1 list to a list
	return rl
---code end---

---example start---
a=[1,2,3]
b=[4,5,6]
c=[7,8,9]
l=zip(a,b,c)

x,y,z= unzip(l) # get them all: x=[1,2,3], y=[4,5,6], z=[7,8,9]
y=unzip(l,1)    # get the 1th one: y as above
x,z=unzip(l,0,2)# get the 0th and 2th ones: x and z as above
---example end---
--file end--

--comment start--
This code will unzip lists which have been zipped together.
If you created a zipped list, l=zip(a,b,c), you can use unzip
to extract one or more of the lists:
	a,b,c=unzip(l)
	b=unzip(l,1)
	a,c=unzip(0,2)
--comment end--