The Python configuration file parsing module ConfigParser USES instances

1. ConfigParser profile

ConfigParser is a package for reading configuration files. The configuration file is formatted as follows: section is contained in the brackets "[]". The following is the configuration content for section similar to key-value.

 [db]

 db_host = 127.0.0.1

 db_port = 22

 db_user = root

 db_pass = rootroot

 

 [concurrent]

 thread = 10

 processor = 20

The brackets "[]" contain section. This is followed by the configuration of section for options similar to key-value.
 
2. ConfigParser initial work

The preferred way to use ConfigParser is to initialize the instance and read the configuration file:

 cf = ConfigParser.ConfigParser()

 cf.read(" Profile name ")

3. Common ConfigParser methods

1. Obtain all sections. Read all the "[]" in the configuration file into the list:

 s = cf.sections()

 print 'section:', s

Will output (as shown in the profile below) :

 section: ['db', 'concurrent']

2. Gets options for section. To read key in an section configuration file into the list:

 o = cf.options("db")

 print 'options:', o

The output:

 options: ['db_host', 'db_port', 'db_user', 'db_pass']

3. Get the configuration information for the specified section.

 v = cf.items("db")

 print 'db:', v

The output:

 db: [('db_host', '127.0.0.1'), ('db_port', '22'), ('db_user', 'root'), ('db_pass', 'rootroot')]

4. Read option information specified by type for section.
The same goes for getfloat, getboolean.

 # It can be read by type 

 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")

 

 #  It's an integer 

 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

The output:

 db_host: 127.0.0.1

 db_port: 22

 db_user: root

 db_pass: rootroot

 thread: 10

 processor: 20

5. Set a value of option. (remember to write back at the end)

 cf.set("db", "db_pass", "zhaowei")

 cf.write(open("test.conf", "w"))

6. Add one section. (also write back)

 cf.add_section('liuqing')

 cf.set('liuqing', 'int', '15')

 cf.set('liuqing', 'bool', 'true')

 cf.set('liuqing', 'float', '3.1415')

 cf.set('liuqing', 'baz', 'fun')

 cf.set('liuqing', 'bar', 'Python')

 cf.set('liuqing', 'foo', '%(bar)s is %(baz)s!')

 cf.write(open("test.conf", "w"))

7. Remove section or option. (write it back as soon as you modify it)

 cf.remove_option('liuqing','int')

 cf.remove_section('liuqing')

 cf.write(open("test.conf", "w"))

#!/usr/bin/env python

from ConfigParser import ConfigParser

CONFIGFILE="f.txt"

config=ConfigParser()

config.read(CONFIGFILE)

print config.get('messages','greeting')

radius=input(config.get('messages','questions')+' ')

print config.get('messages','result')

print config.getfloat('numbers','pi')*radius**2
s=config.sections()

print'section: ',s

o=config.options('messages')

print'messages option: ',o

v=config.items("messages")

print'message de xinxi: ',v
config.add_section('liuyang1')

config.set('liuyang1','int','15')

config.set('liuyang'1,'hhhh','hello world')

config.write(open("f.txt","w"))

print config.get('liuyang1','int')

print config.get('liuyang1','hhhh')

#!/usr/bin/env python

import ConfigParser

import sys

config=ConfigParser.ConfigParser()

config.add_section("book1")

config.set("book1","title","hello world")

config.set("book1","aut","log")

config.write(open("f.txt","w"))