configprase模块，配置文件模块

 import configparser # config = configparser.ConfigParser()
 # config["DEFAULT"] = {'Port':3306,
 #                      'Server_name':'localhost',
 #                      'Server_ip':'127.0.0.1'}
 # config["USER"] = {'user':'root',
 #                   'password':123456,
 #                   'name':'root'}
 # with open('web_config','w') as f:
 #     config.write(f)
 # config2 = configparser.ConfigParser()
 # config2.read('web_config')
 # print(config2.sections())       # "DEFAULT默认不显示"
 # # ['USER', 'LOG']
 # print('PASS' in config2)       # False 判断节是否在配置文件里面
 # # False
 # print(config2['USER']['user']) # 打印节点下面的配置
 # # root
 # for key in config2['USER']:     # 打印某节下下面的所有配置项，DEFAULT配置也会打印出来
 #     print(key)
 # user
 # password
 # name
 # port
 # server_name
 # server_ip
 # print(config2.items('USER'))      # 打印键值对，DEFAULE也会被打印
 # [('port', '3306'), ('server_name', 'localhost'), ('server_ip', '127.0.0.1'), ('user', 'root'),
 # print(config2.get('USER','user'))   # 通过get方法去取值 # 配置文件的增删改
 # config3 = configparser.ConfigParser()
 # config3.read('web_config')
 #
 # config3.add_section('MOUNT')        # 增加配置节点
 # config3.remove_section('LOG')       # 删除配置节点
 #
 # config3.remove_option('USER','root') # 删除某个节点配置
 # config3.set('USER','password','111') # 修改某个具体配置项
 # config3.set('MOUNT','mount','mnt')
 #
 # with open('web_config','w') as f:
 #     config3.write(f)