pairs from a list

[Alan Isaac]

I want to generate sequential pairs from a list.
Here is a way::

    from itertools import izip, islice
    for x12 in izip(islice(x,0,None,2),islice(x,1,None,2)):
        print x12

(Of course the print statement is just illustrative.)
What is the fastest way? (Ignore the import time.)

Thanks,
Alan Isaac