python模块之ConfigParser

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：

 1 #-*- encoding: gb2312 -*-

 2 import ConfigParser

 3 import string, os, sys

 4 

 5 cf = ConfigParser.ConfigParser()

 6 cf.read("test.conf")

 7 # 返回所有的section

 8 s = cf.sections()

 9 print 'section:', s

10 

11 o = cf.options("db")

12 print 'options:', o

13 

14 v = cf.items("db")

15 print 'db:', v

16 

17 print '-'*60

18 #可以按照类型读取出来

19 db_host = cf.get("db", "db_host")

20 db_port = cf.getint("db", "db_port")

21 db_user = cf.get("db", "db_user")

22 db_pass = cf.get("db", "db_pass")

23 

24 # 返回的是整型的

25 threads = cf.getint("concurrent", "thread")

26 processors = cf.getint("concurrent", "processor")

27 

28 print "db_host:", db_host

29 print "db_port:", db_port

30 print "db_user:", db_user

31 print "db_pass:", db_pass

32 

33 print "thread:", threads

34 print "processor:", processors

35 #修改一个值，再写回去

36 cf.set("db", "db_pass", "zhaowei")

37 cf.write(open("test.conf", "w"))

 

参考：

def read_hotfix_cfg(cfg_file):

    print "----Reading the hotfix cfg file----"

    cfg_file = "./mgmt/hotfixes/"+cfg_file

    if not os.path.isfile(cfg_file):

        print "The config file is not exist"

        return False



    try:

        cfg = configobj.ConfigObj(cfg_file, encoding='UTF8')

    except Exception, e:

        print "The cfg_file is wrong: ",

        print e

        return False

   

    elements_path = []

    hf_elements = 'file_build_path'

    if cfg.has_key(hf_elements):

        elements_path = cfg[hf_elements].strip().split('\n')

    else:

        print "The [file_bulid_path] is not in the cfg file"

        return False

    

    global VERSIONS, SRC_TREE

    if cfg.has_key('versions'):

        VERSIONS = str(cfg['versions'])

        SRC_TREE = VERSIONS + "-rpl2sles-upgrade"

    else:

        print "The [versions] is not in the cfg file"

        return False