break_flag = Falsecount = 0while not break_flag:    print("111111层")    while not  break_flag:        print("222222222层")        while not  break_flag:            print("3333333层")            count += 1            if count > 10:                break_flag =True

print("keep")

menu = {    '浙江':{        '杭州':{            '西湖':{                '西溪',                '三墩'},            '滨江':{'滨和', '高新'}},        '丽水':{            '龙泉':{'宝剑', '瓷器'},            '青田':{'石雕', '华侨'},            '缙云':{'烧饼', '木雕'},    },},    '山东':{        '烟台':{'大海', '日照'},        '青岛':{'平度', '黄岛'},        '东营':{'利津', '垦利'}},    '广东':{        '深圳':{'南山', '福田'},        '梅州':{'五华', '兴宁'},        '佛山':{'三水', '桂城'}}}

ext_flage= Falsewhile not ext_flage:    for lev1 in menu:        print(lev1)    choice = input("lev1>>:").strip()    if len(choice) == 0: continue    if choice == "b":break    if choice == "q":        ext_flage = True    if choice in menu[choice]:        while not  ext_flage:            for lev2 in menu[choice]:                print(lev2)            choice2 = input("lev2>>:").strip()            if len(choice2) == 0 :continue            if choice2 == "b":break            if choice2 == "q":                ext_flage = True            if choice2 in menu[choice][choice2]:                while not ext_flage:                    for lev3 in menu[choice][choice2]:                        print(lev3)                    choice3 = input("lev3>>:").strip()                    if len(choice3)== 0: continue                    if choice3 =="b":break                    if choice3 =="q":                        ext_flage = True                    if choice3 in menu[choice][choice2][choice3]:                        while not  ext_flage:                            for lev4 in [choice][choice2][choice3]:                                print(lev4)                            choice4 = input("lev4>>:").strip()                            if len(choice4) == 0 : continue                            if choice3 == "b" :break                            if choice3 == "q" :                                ext_flage = True　　　　　　　　　　　　　　　　　　　　continue