Day5_python(三级菜单代码)

# Welcome Python
province = {
    '湖北':{
        "武汉":{
            "黄陂":["三鲜","木兰山"],
            "新洲":["雷达学院","阳逻码头"]
        }
    },
    '北京':{
        '昌平':{
            '沙河':['oldboy','星巴克']
        }
    },
    '河南':{''},
}
test_condition = False
exit_flag = False
while not exit_flag:
    for i1 in province:
        print(i1)
    choice1=input("选择进入1>>:")
    if choice1 in province:
        while not exit_flag:
             for i2 in province[choice1]:
                 print('\t',i2)
             choice2 = input("选择进入2>>:")
             if choice2 in province[choice1]:
                 while not exit_flag:
                     for i3 in province[choice1][choice2]:
                         print('\t\t',i3)
                     choice3 = input("选择进入3>>:")
                     if choice3 in province[choice1][choice2]:
                         for i4 in province[choice1][choice2][choice3]:
                            print('\t\t\t',i4)
                         choice4 = input("最后一层,按b返回>>:")
                         if choice4 == 'b':
                             pass
                         elif choice4 == 'q':
                            exit_flag = True
                     if choice3 == 'b':
                             break
                     elif choice3 == 'q':
                            exit_flag = True
             if choice2 == 'b':
                             break
             elif choice2 == 'q':
                            exit_flag = True
    if choice1 == 'q':
        exit_flag = True