configure module (reloadable)

conf.py

#!/usr/bin/env python
# encoding: utf-8
import os
from ConfigParser import SafeConfigParser

PREFIX = 'ZTY'
setting = SafeConfigParser()

setting.read(['/etc/zty-site.conf',
              '~/zty-site.conf'])

for k,v in os.environ.iteritems():
    if k.startswith(PREFIX):
        section, _, option = k.partition('_')
        setting.set(section, option, v)

get = setting.get
getboolean = setting.getboolean
getfloat = setting.getfloat
getint = setting.getint