Python模块: 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：

#-*- encoding: gb2312 -*-
import ConfigParser
import string, os, sys

cf = ConfigParser.ConfigParser()
cf.read("test.conf")
# 返回所有的section
s = cf.sections()
print 'section:', s

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

v = 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"))

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('
')
    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