import os a = { "安徽": { "合肥" : { "合肥1":{}, "合肥2":{}, "合肥3":{}, "合肥4":{}, }, "淮南" : { "淮南1":{}, "淮南2":{}, "淮南3":{}, "淮南4":{}, }, "肥东" : { "肥东1":{}, "肥东2":{}, "肥东3":{}, "肥东4":{}, }, }, "河南": { "安阳" : { "安阳1":{}, "安阳2":{}, "安阳3":{}, "安阳4":{}, }, "洛阳" : { "洛阳1":{}, "洛阳2":{}, "洛阳3":{}, "洛阳4":{}, }, "开封" : { "开封1":{}, "开封2":{}, "开封3":{}, "开封4":{}, }, }, "河北": { "唐山": { "唐山1":{}, "唐山2":{}, "唐山3":{}, "唐山4":{}, }, "北京": { "北京1":{}, "北京2":{}, "北京3":{}, "北京4":{}, }, "天津": { "天津1":{}, "天津2":{}, "天津3":{}, "天津4":{}, }, } } while True: for keys in a: print(keys) choice = input("1>>>") if choice in a: while True: for keys2 in a[choice]: print(keys2) choice2 = input("2>>>") if choice2 in a[choice]: while True: for keys3 in a[choice][choice2]: print(keys3) choice3 = input("3>>>") if choice3 == "返回": break elif choice3 == "退出": exit() elif choice2 == "返回": break elif choice2 == "退出": exit() elif choice == "退出": exit()