Python 字典
字典的定义: 字典是一系列键值对,每个键都与一个值相关联,你可以使用键来访问相对于的值,与键关联的值可以是数字,字符串,列表,乃至字典,
事实上可将任何Python对象作为字典的值.
例一
1 teamList = {‘duanxf‘:‘1995‘,‘xiaoming‘:‘97‘} 2 print(teamList[‘duanxf‘])
字典的键与值的添加
1. 先添加键让后将值赋值个键按照打印的顺序应该是向后添加,但是python中不关心排列顺序的问题,值关系键与值对应的关系
例二
1 teamList = {‘duanxf‘:‘1995‘,‘xiaoming‘:‘97‘} 2 print(teamList) 3 teamList[‘xiaohong‘] = 98 4 teamList[‘xiaohua‘] = 99 5 print(teamList)
修改字典的值
例三
1 dictionaries = {"xiaoqian":"19"} 2 dictionaries["xiaoqian"] = 20 3 print(dictionaries[‘xiaoqian‘])
字典键值对删除
# 使用del 语句直接删除了xiaoqian 所在的键值对
1 dictionaries = {"xiaoqian":"19"} 2 dictionaries["xiaoqian"] = 20 3 print(dictionaries[‘xiaoqian‘]) 4 del dictionaries["xiaoqian"] 5 print(dictionaries)
原文：https://www.cnblogs.com/dxf-0/p/11819914.html