[docs] code-example doesn't work as displayed in documentation

[Martin]

http://docs.python.org/py3k/tutorial/datastructures.html#nested-list-comprehensions

the code-example in the last paragraph of nested list comprehensions 
doesn't work like displayed.

displayed:

 >>> zip(*matrix)
[(1, 5, 9), (2, 6, 10), (3, 7, 11), (4, 8, 12)]



but works like that:

 >>> zip(*matrix)
<zip object at 0x7fd9d8a660e0>



to make it work like displayed i had to type:

 >>> list(zip(*matrix))
[(1, 5, 9), (2, 6, 10), (3, 7, 11), (4, 8, 12)]


i guess the example was just copied from the 2.7.3 python documentation 
because it worked like displayed with Python 2.7.3, but not with Python 
3.2.3

Regards
Martin