ConfigParser模块get官方文档解释如下：

The ConfigParser class extends some methods of the RawConfigParser interface, adding some optional arguments.

ConfigParser.get(section, option[, raw[, vars]])

Get an option value for the named section. If vars is provided, it must be a dictionary. The option is looked up in vars (if provided), section, and in defaults in that order.

All the '%' interpolations are expanded in the return values, unless the raw argument is true. Values for interpolation keys are looked up in the same manner as the option.

ConfigParser.items(section[, raw[, vars]])

Return a list of (name, value) pairs for each option in the given section. Optional arguments have the same meaning as for the get() method.

New in version 2.3.

简单来说就是：获取命名部分的选项值

ConfigParser.get（section，option [，raw [，vars]]）

section 配置名

option 选项名

raw bool类型 可选参数，默认为False

vars dict类型 可选参数

如果提供了vars 那么获取配置选项值得规则如下

先在vars中寻找，如果找到就使用vars中的值

如果找不到 就是用默认值

前提是raw的值是False

以下是测试代码

文件test.conf内容如下

[Section1]foo=%(bar)s is %(baz)s!baz=funbar=Python

测试代码：

#!/usr/bin/env python# -*- coding:utf-8 -*-import ConfigParserimport string, oscf = ConfigParser.ConfigParser()cf.read("test.conf")res = cf.get('Section1', 'foo')print "默认情况下, raw=False, 此时输出 %s" % resres = cf.get('Section1', 'foo', raw=False)print "raw=False, 无参数vars 此时等同于默认输出:%s" % resres = cf.get('Section1', 'foo', raw=True)print "raw=True, 无参数vars 此时等输出未被匹配原字符:%s" % resres = cf.get('Section1', 'foo', raw=False, vars={
   'bar': 'Documentation','baz': 'evil'})print "raw=False, vars存在 此时使用vars中的值进行匹配:%s" % resres = cf.get('Section1', 'foo', raw=True, vars={
   'bar': 'Documentation', 'baz':'sdsd'})print "raw=True, vars存在 此时vars不生效,输出未被匹配原字符:%s" % resres = cf.get('Section1', 'foo', raw=False, vars={
   'bar': 'Documentation'})print "raw=True, vars存在，但只包含一个值, 此时另一个值取默认匹配值,输出未:%s" % res

输出如下