Python-сообщество

#!/usr/bin/python
# -*- coding: utf-8 -*-

fl = open('netflow.csv', 'r')
#файл такого вида
#94.100.189.32,443,192.168.10.4,1048,2104
clients = {}
for line in fl:
    server, fromport, client, toport, amount = line.split(',')
    if  client in clients:
        if server in clients[client]:
            clients[client][server] += int(amount)
        else:
            clients[client][server] = int(amount)
    else:
        clients[client] = {}
        clients[client][server] = int(amount)

fl.close()

for client in clients:
    ofile = open('%s.csv' % client.replace('.','_'), 'w' )
    osum = 0
    alist = sorted(clients[client].iteritems(), key=lambda (k,v): (v,k), reverse=True)
    for i in range(len(alist)):
        ofile.write('%s,%d\n' % alist[i] )
        osum += alist[i][1]
    print client, osum
    ofile.close()

    for i in alist:
        ofile.write('%s,%d\n' % i )
        osum += i[1]

>>>import collections
>>>d = collections.defaultdict(int)
>>> d[1] += 10
>>> d
defaultdict(<type 'int'>, {1: 10})

from  collections import defaultdict

class mydict(defaultdict):
    def __init__(self):
        defaultdict.__init__(self, int)

fl = open('netflow.csv', 'r')
clients = defaultdict(mydict)
for line in fl:
    server, fromport, client, toport, amount = line.split(',')
    clients[client][server] += int(amount)

fl.close()