在程序中使用配置文件来灵活的配置一些参数是一件很常见的事情，配置文件的解析并不复杂，在 Python 里更是如此，在官方发布的库中就包含有做这件事情的库，那就是 ConfigParser，这里简单的做一些介绍。
ConfigParser 解析的配置文件的格式比较象 ini 的配置文件格式，就是文件中由多个 section 构成，每个 section 下又有多个配置项，比如：
C代码 
- [db]
- db_host=127.0.0.1
- db_port=3306
- db_user=root
- db_pass=password
- [concurrent]
- thread=10
- processor=20
假设上面的配置文件的名字为 test.conf。里面包含两个 section, 一个是 db, 另一个是 concurrent, db 里面还包含有 4 项，concurrent 里面有两项。这里来做做解析：
#-*- encoding: gb2312 -*-
import ConfigParser
import string, os, sys
cf = ConfigParser.ConfigParser()
cf.read("test.conf")
# 返回所有的section
s = cf.sections()
print 'section:', s
o = cf.options("db")
print 'options:', o
v = cf.items("db")
print 'db:', v
print '-'*60
#可以按照类型读取出来
db_host = cf.get("db", "db_host")
db_port = cf.getint("db", "db_port")
db_user = cf.get("db", "db_user")
db_pass = cf.get("db", "db_pass")
# 返回的是整型的
threads = cf.getint("concurrent", "thread")
processors = cf.getint("concurrent", "processor")
print "db_host:", db_host
print "db_port:", db_port
print "db_user:", db_user
print "db_pass:", db_pass
print "thread:", threads
print "processor:", processors
#修改一个值，再写回去
cf.set("db", "db_pass", "zhaowei")
cf.write(open("test.conf", "w"))
import ConfigParser
import string, os, sys
cf = ConfigParser.ConfigParser()
cf.read("test.conf")
# 返回所有的section
s = cf.sections()
print 'section:', s
o = cf.options("db")
print 'options:', o
v = cf.items("db")
print 'db:', v
print '-'*60
#可以按照类型读取出来
db_host = cf.get("db", "db_host")
db_port = cf.getint("db", "db_port")
db_user = cf.get("db", "db_user")
db_pass = cf.get("db", "db_pass")
# 返回的是整型的
threads = cf.getint("concurrent", "thread")
processors = cf.getint("concurrent", "processor")
print "db_host:", db_host
print "db_port:", db_port
print "db_user:", db_user
print "db_pass:", db_pass
print "thread:", threads
print "processor:", processors
#修改一个值，再写回去
cf.set("db", "db_pass", "zhaowei")
cf.write(open("test.conf", "w"))