python 之ConfigParser

1. ConfigParser 简介
   ConfigParser是用来操作配置文件的模块。
   　　说明：[**]为配置文件的section，基本格式为
   　　[section]
   　　key = value
   eg:
   　　[db]
   　　db_host = 127.0.0.1
   　　db_port = 22
   　　db_user = root
   　　db_pass = rootroot
   　　[concurrent]
   　　thread = 10
   　　processor = 20
2. eg

   #-*- encoding:UTF-8 -*-
    import ConfigParser
   
   def main():
       #初始化
        cf = ConfigParser.ConfigParser()
        cf.read("test.conf")
   
       # 获得所有的section
       section = cf.sections()
       print 'section:', section
   
        #获取指定section下所有的option（key）
       keys = cf.options("db")
       print 'options:', keys
   
       #获取指定section的option的值
       value = cf.items("db")
       print 'db:', value
   
       #可以按照类型读取出来,同样的还有getfloat、getboolean
       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option(key)的值，(记得写回去)
       cf.set("db", "db_pass", "hanhong")
       cf.write(open("test.conf", "w"))
   
       #添加一个section。（写回去）
       cf.add_section('liuqing')
       cf.set('liuqing', 'int', '')
       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"))
   
       #移除section 或者option 。（只要进行了修改就要写回）
       cf.remove_option('liuqing','int')
       cf.remove_section('liuqing')
       cf.write(open("test.conf", "w"))
   
   if __name__ == "__main__":
       main()

   输出：

   section: ['db', 'concurrent']
   options: ['db_host', 'db_port', 'db_user', 'db_pass']
   db: [('db_host', '127.0.0.1'), ('db_port', '22'), ('db_user', 'root'), ('db_pass', 'rootroot')]
   db_host: 127.0.0.1
   db_port: 22
   db_user: root
   db_pass: rootroot
   thread: 10
   processor: 20