老男孩作业之编写写入文件的三级城市菜单

最新推荐文章于 2020-12-23 23:16:05 发布

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最新推荐文章于 2020-12-23 23:16:05 发布

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/tjvz/p/10193606.html

本文介绍了一个数据字典管理系统的设计与实现，该系统采用多级字典结构，支持城市及公司等信息的增删改查操作。系统通过命令行界面接收用户输入，实现了数据的动态维护。尽管代码中存在重复性较高和未优化的问题，但该系统为数据管理提供了一种实用的解决方案。

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#-*- coding:gbk -*-


# data = {
#     '北京':{
#         "昌平":{
#             "沙河":["oldboy","test"],
#             "天通苑":["链家地产","我爱我家"]
#         },
#         "朝阳":{
#             "望京":["奔驰","陌陌"],
#             "国贸":{"CICC","HP"},
#             "东直门":{"Advent","飞信"},
#         },
#         "海淀":{},
#     },
#     '山东':{
#         "德州":{},
#         "青岛":{},
#         "济南":{}
#     },
#     '广东':{
#         "东莞":{},
#         "常熟":{},
#         "佛山":{},
#     },
# }


def info_change(info):
    f1 = open("data.txt","w")
    f1.write(info)
    f1.close()



f = open("data.txt","r",encoding="gbk")
data_str = f.read()
data = eval(data_str)

flag = 1
while flag:
    for i in data:
        print(i)
    print("i or I 插入数据")
    print("c or C 修改数据")
    print("d or D 删除数据")
    choices = input("choices:")
    if choices == "i" or choices == "I":
        add_city_one = input("增加一级城市：")
        a = {add_city_one:{}}
        data.update(a)
        data = str(data)
        info_change(data)
        data = eval(data)
    elif choices == "c" or choices == "C":
        change_city_one = input("修改一级城市：")
        a = {change_city_one: {}}
        data.update(a)
        data = str(data)
        info_change(data)
        data = eval(data)
    elif choices == "d" or choices == "D":
        delete_city_one = input("删除一级城市：")
        data.pop(delete_city_one)
        data = str(data)
        info_change(data)
        data = eval(data)
    elif choices == "b" or choices== "B"or choices == "q"or choices == "Q":
        flag = 0
    # elif data[choices] == {}:
    #     print("无数据")
    #     flag = False
    while choices in data and flag:
        for i in data[choices]:
            print(i)
        print("i or I 插入数据")
        print("c or C 修改数据")
        print("d or D 删除数据")
        choice1 = input("choice1:")
        if choice1 == "i" or choice1 == "I":
            add_city_two = input("增加二级城市：")
            a = {add_city_two: {}}
            data[choices].update(a)
            data = str(data)
            info_change(data)
            data = eval(data)
        elif choice1 == "c" or choice1 == "C":
            change_city_two = input("修改二级城市：")
            a = {change_city_two: {}}
            data[choices].update(a)
            data = str(data)
            info_change(data)
            data = eval(data)
        elif choice1 == "d" or choice1 == "D":
            change_city_two = input("删除二级城市：")
            data[choices].pop(change_city_two)
            data = str(data)
            info_change(data)
            data = eval(data)
        elif choice1 == "b" or choice1 == "B":
            break
        elif choice1 == "q" or choice1 == "Q":
            flag = False
        elif data.get(choices).get(choice1) != {}:
            pass
        # elif data.get(choices).get(choice1) == {}:
        #     print("无数据")
        #     flag = False
        while choice1 in data[choices] and flag:
            for i in data[choices][choice1]:
                print(i)
            print("i or I 插入数据")
            print("c or C 修改数据")
            print("d or D 删除数据")
            choice2 = input("choice2:")
            if choice2 == "i" or choice2 == "I":
                add_city_three = input("增加三级城市：")
                a = {add_city_three: {}}
                data[choices][choice1].update(a)
                data = str(data)
                info_change(data)
                data = eval(data)
            elif choice2 == "c" or choice2 == "C":
                change_city_three = input("修改三级城市：")
                a = {change_city_three: {}}
                data[choices][choice1].update(a)
                data = str(data)
                info_change(data)
                data = eval(data)
            elif choice2 == "d" or choice2 == "D":
                change_city_three = input("删除三级城市：")
                data[choices][choice1].pop(change_city_three)
                data = str(data)
                info_change(data)
                data = eval(data)
            elif choice2 == "b" or choice2 == "B":
                break
            elif choice2 == "q" or choice2 == "Q":
                flag = 0
            elif data.get(choices).get(choice1).get(choice2) != {}:
                pass
            # elif data.get(choices).get(choice1).get(choice2) == {}:
            #     print("无数据")
            #     flag = False
            while choice2 in data[choices][choice1] and flag:
                for i in data[choices][choice1][choice2]:
                    print(i)
                # choice3 = input("END，请输入b返回")
                print("i or I 插入数据")
                print("c or C 修改数据")
                print("d or D 删除数据")
                choice3 = input("choice3:")
                if choice3 == "i" or choice3 == "I":
                    add_city_four = input("增加四级城市：")
                    a = {add_city_four: {}}
                    data[choices][choice1][choice2].update(a)
                    data = str(data)
                    info_change(data)
                    data = eval(data)
                elif choice3 == "c" or choice3 == "C":
                    add_city_four = input("修改四级城市：")
                    a = {add_city_four: {}}
                    data[choices][choice1][choice2].update(a)
                    data = str(data)
                    info_change(data)
                    data = eval(data)
                elif choice3 == "d" or choice3 == "D":
                    add_city_four = input("删除四级城市：")
                    data[choices][choice1][choice2].pop(add_city_four)
                    data = str(data)
                    info_change(data)
                    data = eval(data)
                if choice3 == "b" or choice3 == "B":
                    break
                elif choice3 == "q" or choice3 == "Q":
                    flag = 0