Fix a depreciated example

[RPINerd]

itertools no longer uses *.next() call izip() is depreciated and replaced by built in zip()

[peterjc]

That looks OK as a Python 2 to 3 change - were you able to test this?

[RPINerd]

That looks OK as a Python 2 to 3 change - were you able to test this?

Yes! Hah I actually was following the example to implement it in a new script I was putting together and had to do the two committed changes to get things working on py3

[peterjc]

Great, thank you!