多级菜单的练习---字典

date = {
    's1':{
        'ss1':{
            'sss1':{
                'ssss1':{
                    'sssss1':{'key1','bey1'},
                    'sssss2':{'key2','bey2'}},
                'ssss2':{
                    'aaaa1':{'a1','b2'},
                    'aaaa2':{'b1','b2'}}},
            'sss2':{
                'das':{
                    'rewq':{'sss','qqq'}}}},
        'ss2':{
            'www1':{
                'www':{
                    'dsa':{'mmm','kkk'}}}}},
    's2':{
        'sa':{
            'ghfd':{
                'mnb':{
                    'jhg':{'gf','tr'}}}}},
}
while True:
    for d1 in date:
        print(d1)
    choise1 = input('请选择1:')
    if choise1 in date:
        while True:
            for d2 in date[choise1]:
                print(d2)
            choise2 = input('请选择2:')
            if choise2 in date[choise1]:
                while True:
                    for d3 in date[choise1][choise2]:
                        print(d3)
                    choise3 = input('请选择3:')
                    if choise3 in date[choise1][choise2]:
                        while True:
                            for d4 in date[choise1][choise2][choise3]:
                                print(d4)
                            choise4 = input('请选择4:')
                            if choise4 in date[choise1][choise2][choise3]:
                                while True:
                                    for d5 in date[choise1][choise2][choise3][choise4]:
                                        print(d5)
                                    choise5 = input('请选择5:')
                                    if choise5 in date[choise1][choise2][choise3][choise4]:
                                        for d6 in date[choise1][choise2][choise3][choise4][choise5]:
                                            print(d6)
                                        choise6 = input("最后一层，按b返回:")
                                        if choise6 == 'b':
                                            pass
                                    if choise5 == 'b':
                                         break
                            if choise4 == 'b':
                                break
                    if choise3 == 'b':
                        break
            if choise2 == 'b':
                break
    if choise1 == 'b':
        break