python配置文件

http://blog.csdn.net/zhaoweikid/article/details/1651087

    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: 

[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
=  cf.sections()
print   ' section: ' , s

=  cf.options( " db " )
print   ' options: ' , o

=  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 " ))


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