字典的相关操作

字典的相关操作

1. keys() 获取到所有的键
2. values() 获取到所有的值
3. items() 拿到所有的键值对

# dic = {"赵四":"刘晓光", "刘能":"王晓利", "王木生":"范伟"}
# 直接for循环
# for key in dic: # 直接循环字典拿到的是key, 有key直接拿value
#     print(key)
#     print(dic[key])

# dic = {"赵四":"刘晓光", "刘能":"王晓利", "王木生":"范伟"}

# 不常用的
# print(dic.keys()) # dict_keys(['赵四', '刘能', '王木生']) 像列表. 山寨列表
# for k in dic.keys(): # 拿到的是字典中的每一个key
#     print(k)

# 当需要单独获取到所有value的时候
# print(dic.values()) # dict_values(['刘晓光', '王晓利', '范伟'])  所有的value的一个数据集
# for v in dic.values():
#     print(v)

# print(dic.items()) # 所有的键值对 dict_items([('赵四', '刘晓光'), ('刘能', '王晓利'), ('王木生', '范伟')])
# for k, v in dic.items(): # 遍历字典最简单的方案
#     # print(item) # ('赵四', '刘晓光')
#     # k, v = item # 解构
#     # k = item[0]
#     # v = item[1]
#     print(k, v)


# a, b = 1, 2, 3  # 把后面的两个值分别赋值给前面两个变量. 解构, 解包
# print(a)
# print(b)

# c = 1,2,3
# print(c) # (1, 2, 3) # 元组和列表是可以解包的

# d, e, f = [1,2,3]
# print(d)
# print(e)
# print(f)


# 遍历字典两套方案
dic = {"赵四":"刘晓光", "刘能":"王晓利", "王木生":"范伟"}
# 1. 使用for循环直接遍历字典的key
# for key in dic:
#     print(key)
#     print(dic[key])

# 2. 可以使用字典的items()+解构可以直接获取到key和value
# for k, v in dic.items():
#     print(k)
#     print(v)

　字典的嵌套

wf = {
    "name":"汪峰",
    "age":52,
    "hobby":["唱歌", "上头条", "穿皮裤"],
    "wife": {
        "name": "章子怡",
        "age": 49,
        "hobby":["演戏", "上电视", "当导师"],
        "tishen": {
            "name":"萌萌",
            "age":28
        },
        "zhuli":{
           "name":"磊磊",
           "age": 20
        }
    },
    "zhuli":{
        "name":"宝宝",
        "age":23,
        "hobby":["抽烟","喝酒","烫头"]
    },
    "children":[{"name":"汪老大"}, {"name":"汪老二"}]
}
# wf['children'][1]["age"] = 2
# print(wf)
# # print(wf['zhuli']['name'])
#
# # 汪峰老婆替身的名字
# print(wf['wife']['tishen']['name'])
# # 汪峰老婆的第二个爱好
# print(wf['wife']['hobby'][1])
# # 汪峰助理的第三个爱好
# print(wf['zhuli']['hobby'][2])
#
#
# # 汪峰的助理+10岁
# wf['zhuli']['age'] = wf['zhuli']['age'] + 10
# # 汪峰的老婆添加一个爱好("导戏")
# wf['wife']['hobby'].append("导戏") # 添加完毕了
# # 删除汪峰助理的"抽烟"爱好
# wf["zhuli"]["hobby"].remove("抽烟")
# print(wf)