2-4字典+三级菜单

#!/usr/bin/env python
# -*- coding:utf-8 -*-
info={          #字典赋值
    'aa':'11','xx':'44',
    'bb':'22','yy':'55',
    'cc':'33','zz':'66',
}
print('1 ',info)
print('2 ',info['cc']) #取值
info['cc']='99'     #改值
print('3 ',info)

del info['cc']     #删除
info.pop('aa')      #删除
info.popitem()      #随机删
print('4 ',info)

print('5 ',info.get('bb')) #查询
print('6 ', 'yy' in info)  #查询yy是否在info中

print('++++++++++++++++++++++++')
abc={
    "神仙":{
        '玉帝':['天庭'],
        '悟空':['齐天大圣','斗战胜佛'],
        '老君':['太上老君']
    },
    '妖怪':{
        '牛魔王':['大力牛魔王','妖魔'],
        '白骨精':['三次整容'],
        '金鹏王':['狮子精']
    },
    '人类':{
        '皇上':['主宰'],
        '宰相':['一人之下万人之上'],
        '将军':['一将成功万骨枯']
    }
}
print(abc)
abc['神仙']['悟空'][1]='美猴王'
print(abc['神仙'])

print('++++++++')
a={1:2,3:4}
b={1:9,5:6}
a.update(b) #有相同的替换，不同的则追加
print(a)

c=dict.fromkeys([7,8,9],'test')  #dict是临时值，不重要
print(c)

c=dict.fromkeys([7,8,9],[1,{'qq':'99'},777])  #dict是临时值，不重要，所有值一样
print(c)

c[8][1]['qq']='QQ'      #改一个时，全改
print(c)

#字典循环
for i in abc:
    print(i)
for i in abc:       #少用
    print(i,abc[i])     #不高效
print('+++')
for i,j in abc.items():  #高效
    print(i,j)

print('++++++++++++')

#三层菜单
abc={
    'a': {
        "a1": {
            "a12": ["a121", "a122"],
            "a12": ["a121", "a122"]
        },
        "a2": {
            "a21": ["a211", "a212"],
            "a22": {"a221", "a222"},
            "a23": {"a231", "a232"},
        },
        "a3": {},
    },
    'b': {
        "b1": {},
        "b2": {},
        "b3": {}
    },
    'c': {
        "c1": {},
        "c2": {},
        "c3": {},
    },
}
x=True
while x:
    for i in abc:
        print(i)            #显示第一层所有
    a = input("选择进入1>>:")
    if a in abc:
        while x:
            for i2 in abc[a]:
                print("\t",i2)  #显示第二层所有
            b = input("选择进入2>>:")
            if b in abc[a]:
                while x:
                    for i3 in abc[a][b]:
                        print("\t\t", i3)   #显示第三层所有
                    c = input("选择进入3>>:")
                    if c in abc[a][b]:
                        for i4 in abc[a][b][c]:
                            print("\t\t",i4)       #显示第四层所有
                        d = input("最后一层，按b返回>>:")
                        if d == "b":
                            pass
                        elif d == "q":
                            x = False
                    if c == "b":
                        break
                    elif c == "q":
                        x = False
            if b == "b":
                break
            elif b == "q":
                x = False
        if a=='q':
            x = False