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>>> help(zip) #3.0
class zip(object)
 | zip(iter1 [,iter2 [...]]) --> zip object
 | 
 | Return a zip object whose .__next__() method ... StopIteration. 
 | Works like the zip()
 | function but consumes less memory by returning an iterator instead of
 | a list.
The last sentence is left over from when 3.0 zip was itertools.izip.
Just delete it.