Python 字典魔法一

#字典

#dict

#1 基本结构
info = {
    "k1":"v1",# 键值对
    "k2":"v2"
}

#2 字典的value是可以任何值
info = {
    "k1":18,
    "k2":True,
    "k3":[
        11,22,33,
        {
            "kk1":"ddd",
            "kk2":"uuu",
            "kk3":(11,22)
        }
    ],
    "k4":("pp")
}
print(info)

 

 

#5索引指定的元素
v = info["k3"][3]["kk3"][0]
print(v)

 

 

#3列表，字典不能作为字典的key
info = {
    5:"adad",
    "k1":"fff",
    True:"123",
    (22,33):"ff",
    "k3":[
        11,22,33,
        {
            "kk1":"ddd",
            "kk2":"uuu",
            "kk3":(11,22)
        }
    ],
}
print(info)

#4字典是无序的
v = info["k1"]
print(v)

v = info[5]
print(v)

#6删除
del info[5]
print(info)

 

 

del info["k3"][3]["kk1"]
print(info)

 

 

#7for 循环

for item in info:
    print(item)

 

 

for item in info.keys():
    print(item)

 

 

for item in info.values():
    print(item)

 

 

for item in info.keys():
    print(item,info[item])

 

 

for k,v in info.items():
    print(k,v)