python从入门到放弃-06-字典
####字典####
字典是python中唯一的映射类型，key- value，字典对象可变，key不可变对象
####字典的定义####
dic = {'x':'y','z':num}
####内建方法####
dic = {}.fromkeys(('x','y'),'z')
####字典值的访问####
通过对字典key的访问
遍历循环
####字典key-value添加####
dic[key] = value
####字典的删除####
dic.pop('name') dic.popitem() dic.clear() del (dic)