擅长:python、mysql、java
<pre><code>import csv
ifile = open('sample.csv', 'rb')
csv_reader = csv.reader(ifile)
d = {}
for row in csv_reader:
d[row[0]] = int(row[1]) if d.get(row[0], None) is None else d[row[0]] + int(row[1])
from pprint import pprint
pprint(d)
</code></pre>