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:', s10 11 o = cf.options("db")12 print 'options:', o13 14 v = cf.items("db")15 print 'db:', v16 17 print '-'*6018 #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_host29 print "db_port:", db_port30 print "db_user:", db_user31 print "db_pass:", db_pass32 33 print "thread:", threads34 print "processor:", processors35 #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