Python 3 codes for loops

In my python script, there are 7 rows (0 to 6) in a list of lists (alignments). The SeqIDs of the first 2 rows, the next 2 rows and the last 3 rows are similar. Now, while appending the rows using the following codes

uniques = [] ap = open(tempparse, ‘w’) for row in range(len(alignments)): ap.write(‘row ‘+str(row)+’\n’)

for compare in range(row+1,len(alignments)):
......
......
.......

the last row (i. e. the last one of the last 3 rows in the list ) is not appended because it does not have any subsequent row to compare, and therefore, the six rows are appended except for the last one.

How can I resolve this issue?