Get a running total from a list

Question

I\'m reading in items:

for line in sys.stdin:
    line = line.strip()
    data = line.split(\"-\")

If I print data as it is read,

Answer 1

Initialize a defaultdict with type int and use the name as the key

from collections import defaultdict
name_list = defaultdict(int)
for line in sys.stdin:
    line = line.strip()
    data = line.split("-")
    name = data[0]
    value = int(data[1])
    name_list[name] += value
for key, value in name_list.items(): print key, value