# coding=utf-8

 import configparser

 cong=configparser.ConfigParser()

 cong.read("new",encoding="utf-8")

 # cong.add_section("section3")#添加一个节点

 # cong.add_section("section1")

 # cong.write(open("new","a"))#

 #

 cong.remove_section("section3")#删除一个节点,删除之前要先读取该文件,

 # cong.write(open("new","w+"))

 cong.set("section1","val1","123")#更改指定节点下指定的建和值

 #cong.set("section3","valu1","456")

 cong.remove_option("section1","s1")#删除指定节点下的指定建

 cong.write(open("new","w"))