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  • Day1 三级目录

    d_city = {
        "河南" : {"郑州" : ["二七区","中原区","回族管城区","惠济区","金水区","上街区"],
                   "信阳" : ["浉河区","平桥区","羊山新区","南湾区","上天梯区","鸡公山区"]},
        "广东":{"广州":["越秀","海珠","荔湾","天河","白云","黄埔","南沙"],
                     "深圳":["罗湖区","龙岗区","福田区","南山区","盐田区","宝安区","大鹏新区"]}
    

    d_city = {
        "河南" : {"郑州" : ["二七区","中原区","回族管城区","惠济区","金水区","上街区"],
                   "信阳" : ["浉河区","平桥区","羊山新区","南湾区","上天梯区","鸡公山区"]},
        "广东":{"广州":["越秀","海珠","荔湾","天河","白云","黄埔","南沙"],
                "深圳":["罗湖区","龙岗区","福田区","南山区","盐田区","宝安区","大鹏新区"]}
    }
    while True:#保证 break 到这一级可以循环下去
        for index, key in enumerate(d_city.keys()):
            print(index, key)
            print('******************
    ')
        value_f = input("请选择区域(退出请按q,返回请按b):").strip() #first 选择,选择第一个区域
        if value_f.isdigit():
            value_f = int(value_f)#保证输入为数字
            list_a = list(d_city.keys())[value_f]
            while True:#选择正确的区域编号后,进入下一级循环
                for index, key in enumerate(d_city[list_a]):#遍历序列中的元素以及它们的下标
                    print(index, key)#显示遍历结果
                value_s = input("请选择地区(退出请按q,返回请按b):").strip()
                if value_s.isdigit():
                    value_s = int(value_s)
                    list_b = list(d_city[list_a].keys())[value_s]
                    while True:
                        for index, key in enumerate(d_city[list_a][list_b]):
                            print(key)
                        value_d = input("退出请按q,返回请按b:").strip()
                        if value_d == 'q':
                            exit()
                        elif value_d == 'b':
                            break
                        else:print("请输入指定值")
                elif value_s == 'q':
                    exit()
                elif value_s == 'b':
                    break
        elif value_f == 'q':
                exit()
        elif value_f == 'b':
                break
    #最后几行保证每一级都可以返回上一级,以及结束循环
    
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  • 原文地址:https://www.cnblogs.com/kamil/p/5143906.html
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