gree-test2.py

def getIP (record):
    return record[:record.index(" ")]

def go ():
    ips = dict()
    for line in open("access.log", "r"):
        ip = getIP(line)
        ips[ip] = ips.get(ip, 0) + 1
    ips = sorted(ips.items(), key=lambda x: -x[1])
    prettify(ips)

def prettify (records):
    for i in records:
        print "%15s %10d" % i

go()