Python day4知识回顾

# -*- coding: utf_8 _*_
# Author:Vi
#字典是无序的

info = {
    'student001':"DIO",
    'student002':"JOJO",
    'student003':"Pucci",
}

'''
#print(info['student003'])
info['student001'] = "屌"#对已有字典进行修改
info['student004'] = "Zepple"#添加新的
#del info['student001']#删除
#info.pop("student001")#也是删除
print(info)
info.popitem()#随即删一个
print(info)
print(info.get('student003'))#判断字典内有没有这个东西
print('student002' in info)#判断是否在内返回真假值
'''
infob = {
    'student001':"Dongwei",
    1:3,
    2:4
}
info.update(infob)#更新字典，有的话就代替，没有就创建
c = dict.fromkeys([6,7,8],"DIO")#初始化一个新的字典，key已经写好了，后面可以赋值；
print(info.items())#将字典改成列表
print(c)
for i in info:
    print(i,info[i])#字典循环方式

#多级字典嵌套及操作

game_cataloge = {
    'Chinese':{
        "www.didi.com":["Many resources","Good qualities"],
        "www.womiao.com":["Beautiful Web","Many things"],
    },
    'Japan':{
        "www.pixiv.com":["Splendid pictures and comic","VPN NEED"],
        "www.asanews.com":["Japan local news","vpn must"],
    }
}
game_cataloge['Chinese']["www.di" \
                         "di.com"][1] = "Bad qualities"#修改多级字典
game_cataloge.setdefault("Japan1",{"www.keroro.com"})#能取到值就返回，取不到就创建一个新的
print(game_cataloge)
#print(game_cataloge.keys())#打印keys