python - Writing a dict list as rows in CSV -

i have simple csv file:

101,8 102,10 102,6 103,5 104,0 

with duplicated entries row[0] on second , third line , want keep last (or lower row[1] value) duplicate. way have figured out how make work correctly using dict() sort, having problems writing csv file correct format. code:

from operator import itemgetter pprint import pprint import csv  open('cards1.csv', 'rb') csvfile:     reader = csv.reader(csvfile, delimiter=',')     open('cards2.csv', 'wb') csvfile1:         writer = csv.writer(csvfile1, delimiter=',')         rows = iter(reader)         sort_key = itemgetter(0)         sorted_rows = sorted(rows, key=sort_key)         unique_rows = dict((row[0], row) row in sorted_rows)         pprint (unique_rows)          writer.writerows(unique_rows) 

which prints:

{'101': ['101', '8'],  '102': ['102', '6'],  '103': ['103', '5'],  '104': ['104', '0']} 

but writes files as:

1,0,2 1,0,3 1,0,1 1,0,4 

where remove duplicate in row[0] largest value in row[1]. (btw, order of created csv not critical)

if understand correctly.

instead of:

writer.writerows(unique_rows) 

you want like:

for row in unqiue_rows.values():     writer.writerow(row)