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