standalone python s3 log script for zabbix

#!/usr/bin/env python

import os
import sys

from datetime import datetime, timedelta

import boto
import yaml

DATEFORMAT = '%Y-%m-%dT%H:%M:%S.000Z'

if len(sys.argv) != 4:
    print("Usage: {} bucket|level|s3appname".format(sys.argv[0]))
    sys.exit(1)

def get_prefix(level, s3appname, actdate):
    return '{0}/{1}/y={2:%Y}/m={2:%m}/d={2:%d}'.format(
        level, s3appname, actdate)

def call(bucketname, level, s3appname):
    c = boto.connect_s3()
    yesterday_p = get_prefix(level, s3appname,
                                  datetime.utcnow() - timedelta(days=1))
    today_p = get_prefix(level, s3appname, datetime.utcnow())

    bucket = c.get_bucket(bucketname).list(today_p)
    latest = sorted(bucket, key=lambda x: x.last_modified, reverse=True)
    if not latest:
        bucket = c.get_bucket(bucketname).list(yesterday_p)
        latest = sorted(bucket,
                        key=lambda x: x.last_modified, reverse=True)

    if not latest:
        raise Exception("No logs found on S3")

    latestdate = latest[0].last_modified
    latestdate = datetime.strptime(latestdate, DATEFORMAT)
    diff = round((datetime.utcnow() - latestdate).seconds / 60, 2)
    #print '{0} : {1} : {2}'.format(bucketname, latestdate, diff)
    return diff

answer = call(sys.argv[1], sys.argv[2], sys.argv[3])
print answer