Using namedtuples field names for column indices in a list of lists

Mon Jan 9 09:21:43 EST 2017

On 2017年01月08日 22:58, Deborah Swanson wrote:
> 1) I have a section that loops through the sorted data, compares two
> adjacent rows at a time, and marks one of them for deletion if the
> rows are identical.
>> I'm using 
>> for i in range(len(records)-1):
> r1 = records[i]
> r2 = records[i+1]
> if r1.xx = r2.xx:
> 		.
> 		.
> and my question is whether there's a way to work with two adjacent
> rows without using subscripts? 

I usually wrap the iterable in something like
 def pairwise(it):
 prev = next(it)
 for thing in it:
 yield prev, thing
 prev = thing
 for prev, cur in pairwise(records):
 compare(prev, cur)
which I find makes it more readable.
-tkc