reduce: cfmr_itembased_step3_iisim_r.py
# coding=utf-8
import sys
cur_ii_pair = None
score = 0.0
for line in sys.stdin:
ii_pair, s = line.strip().split('\t')
if cur_ii_pair == None:
cur_ii_pair = ii_pair
if cur_ii_pair != ii_pair:
item_a, item_b = cur_ii_pair.split('_')
print( "%s\t%s\t%s" % (item_a, item_b, score))
cur_ii_pair = ii_pair
score = 0.0
score += float(s)
item_a, item_b = cur_ii_pair.split('_')
print ("%s\t%s\t%s" % (item_a, item_b, score))