On Wed, 10 Oct 2007 20:25:00 +0000, Paul Hankin wrote:
>> A "works-for-me":
>>
>> >>> pairs = (test[i:i+2] for i in xrange(len(test)-1))
>> >>> for a,b in pairs:
>> ... print a,b
>
> for a, b in zip(test, test[1:]):
> print a, b
May be unfortunately slow if test is half a gigabyte of data, what with
essentially making three copies of it. Lazy procedures like the generator
expression above are often much better.
Just for completion, here's another way:
prev = test[0]
for i in xrange(1, len(test)):
print prev, test[i]
prev = test[i]
--
Steven.
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