ConfigParser模块的使用

1.读取配置文件

-read(filename) 直接读取ini文件内容

-sections() 得到所有的section，并以列表的形式返回

-options(section) 得到该section的所有option

-items(section) 得到该section的所有键值对

-get(section,option) 得到section中option的值，返回为string类型

-getint(section,option) 得到section中option的值，返回为int类型

 

2.写入配置文件

-add_section(section) 添加一个新的section

-set( section, option, value) 对section中的option进行设置

         需要调用write将内容写入配置文件。

 

3.例子

test.conf

[sec_a]

a_key1 = 20

a_key2 = 10

 

[sec_b]

b_key1 = 121

b_key2 = b_value2

b_key3 = $r

b_key4 = 127.0.0.1

 

parse_test_conf.py

import ConfigParser

 

cf = ConfigParser.ConfigParser()

 

#read config

cf.read("test.conf")

 

# return all section

secs = cf.sections()

print 'sections:', secs

 

opts = cf.options("sec_a")

print 'options:', opts

 

kvs = cf.items("sec_a")

print 'sec_a:', kvs

 

#read by type

str_val = cf.get("sec_a", "a_key1")

int_val = cf.getint("sec_a", "a_key2")

 

print "value for sec_a's a_key1:", str_val

print "value for sec_a's a_key2:", int_val

 

#write config

#update value

cf.set("sec_b", "b_key3", "new-$r")

#set a new value

cf.set("sec_b", "b_newkey", "new-value")

#create a new section

cf.add_section('a_new_section')

cf.set('a_new_section', 'new_key', 'new_value')

 

#write back to configure file

cf.write(open("test.conf", "w"))

 

print

sections: ['sec_b', 'sec_a']

options: ['a_key1', 'a_key2']

sec_a: [('a_key1', "i'm value"), ('a_key2', '22')]

value for sec_a's a_key1: i'm value

value for sec_a's a_key2: 22

 

更新后的test.conf

[sec_b]

b_newkey = new-value

b_key4 = 127.0.0.1

b_key1 = 121

b_key2 = b_value2

b_key3 = new-$r

 

[sec_a]

a_key1 = i'm value

a_key2 = 22

 

[a_new_section]

new_key = new_value

 

4.可能抛出的异常

exception NoSectionError

Exception raised when a specified section is not found.

exception DuplicateSectionError

Exception raised if add_section() is called with the name of a section that is already present.

exception NoOptionError

Exception raised when a specified option is not found in the specified section.

exception InterpolationError

Base class for exceptions raised when problems occur performing string interpolation.

exception InterpolationDepthError

Exception raised when string interpolation cannot be completed because the number of iterations exceeds MAX_INTERPOLATION_DEPTH. Subclass of InterpolationError.

exception InterpolationMissingOptionError

Exception raised when an option referenced from a value does not exist. Subclass of InterpolationError. New in version 2.3.

exception InterpolationSyntaxError

Exception raised when the source text into which substitutions are made does not conform to the required syntax. Subclass of InterpolationError. New in version 2.3.

exception MissingSectionHeaderError

Exception raised when attempting to parse a file which has no section headers.

exception ParsingError

Exception raised when errors occur attempting to parse a file.