第2章 Python基础-字符编码&数据类型 购物车&多级菜单 作业

作业 

一、三级菜单

数据结构:
menu = {
    '北京':{
        '海淀':{
            '五道口':{
                'soho':{},
                '网易':{},
                'google':{}
            },
            '中关村':{
                '爱奇艺':{},
                '汽车之家':{},
                'youku':{},
            },
            '上地':{
                '百度':{},
            },
        },
        '昌平':{
            '沙河':{
                '老男孩':{},
                '北航':{},
            },
            '天通苑':{},
            '回龙观':{},
        },
        '朝阳':{},
        '东城':{},
    },
    '上海':{
        '闵行':{
            "人民广场":{
                '炸鸡店':{}
            }
        },
        '闸北':{
            '火车站':{
                '携程':{}
            }
        },
        '浦东':{},
    },
    '山东':{},
}
View Code
需求:
  • 可依次选择进入各子菜单
  • 可从任意一层往回退到上一层
  • 可从任意一层退出程序

所需新知识点:列表、字典

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# 输入省份、城市、县名称

China = {
    '河南省': {
        '焦作市': ['武陟', '温县', '博爱'],
        '郑州市': ['新郑', '荥阳', '中牟'],
        '开封市': ['兰考', '尉氏', '杞县'],
    },
    '广东省': {
        '广州市': ['越秀', '荔湾', '番禺'],
        '深圳市': ['福田', '罗湖', '龙岗'],
        '东莞市': ['莞城', '南城', '东城'],
    },
}

exit_flag = False
while not exit_flag:  # 第1层循环
    print("33[31;1m---------------------------------33[1m")
    print("         33[31;1m欢迎您来到中国33[1m      ")
    print("33[31;1m---------------------------------33[1m")
    for Province in China:
        print(Province)
    print()
    choice_province = input("1.请输入您要前往的 省份 (输入q退出,输入b返回上级):")
    print()
    if choice_province == "q":
        exit_flag = True
    elif choice_province == "b":
        continue  # 跳出第1层循环的剩下语句,继续进行下一次循环(选择省份)
    elif choice_province in China:
        while not exit_flag:  # 第2层循环
            for City in China[choice_province]:
                print(City)
            print()
            choice_city = input("2.请输入您要前往的 市区 (输入q退出,输入b返回上级):")
            print()
            if choice_city == "q":
                exit_flag = True
            elif choice_city == "b":
                break  # 跳出整个第2层循环,重新进行第1层循环(选择省份)
            elif choice_city in China[choice_province]:
                while not exit_flag:  # 第3层循环
                    for County in China[choice_province][choice_city]:
                        print(County)
                    print()
                    choice_county = input("3.请输入您要前往的 县 (输入q退出,输入b返回上级):")
                    print()
                    if choice_county == "q":
                        exit_flag = True
                    elif choice_county == "b":
                        break  # 跳出整个第3层循环,重新进行第2层循环(选择市区)
                    elif choice_county in China[choice_province][choice_city]:
                        print("---------------------------------")
                        print("您现在的位置是:", choice_province, choice_city, choice_county)
                        print("---------------------------------")
                        exit_flag = True
                    else:
                        print("您输入的县不存在")
                        print()
                        continue
            else:
                print("您输入的市区不存在")
                print()
                continue
    else:
        print("您输入的省份不存在")
        print()
        continue
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# 输入省份、城市、县序号

China = {
    '河南省': {
        '焦作市': ['武陟', '温县', '博爱'],
        '郑州市': ['新郑', '荥阳', '中牟'],
        '开封市': ['兰考', '尉氏', '杞县'],
    },
    '广东省': {
        '广州市': ['越秀', '荔湾', '番禺'],
        '深圳市': ['福田', '罗湖', '龙岗'],
        '东莞市': ['莞城', '南城', '东城'],
    },
}

exit_flag = False
while not exit_flag:  # 第1层循环
    province_list = [] # 定义一个省份列表
    city_list = [] # 定义一个城市列表
    print("33[31;1m---------------------------------33[1m")
    print("         33[31;1m欢迎您来到中国33[1m      ")
    print("33[31;1m---------------------------------33[1m")
    for index,Province in enumerate(China,1):
        print("%s. %s" % (index,Province))
        province_list.append(Province) # 添加所有省份到省份列表中
    print()
    choice_province = input("一.请输入您要前往的省份序号 (输入q退出,输入b返回上级):")
    print()
    if choice_province == "q" or choice_province == "Q":
        exit_flag = True
    elif choice_province == "b" or choice_province == "B":
        continue  # 跳出第1层循环的剩下语句,继续进行下一次循环(选择省份)
    elif choice_province.isdigit():
        choice_province = int(choice_province)
        if choice_province >= 1 and choice_province <= len(province_list):
            while not exit_flag:  # 第2层循环
                for index,City in enumerate(China[province_list[choice_province-1]],1):
                    print("%s. %s" % (index,City))
                    city_list.append(City)  # 添加所有城市到城市列表中
                print()
                choice_city = input("二.请输入您要前往的城市序号 (输入q退出,输入b返回上级):")
                print()
                if choice_city == "q" or choice_city == "Q":
                    exit_flag = True
                elif choice_city == "b" or choice_city == "B":
                    break  # 跳出整个第2层循环,重新进行第1层循环(选择省份)
                elif choice_city.isdigit():
                    choice_city = int(choice_city)
                    if choice_city >=1 and choice_city <= len(city_list):
                        while not exit_flag:  # 第3层循环
                            for index,County in enumerate(China[province_list[choice_province-1]][city_list[choice_city-1]],1):
                                print("%s. %s" % (index, County))
                            print()
                            choice_county = input("三.请输入您要前往的县序号 (输入q退出,输入b返回上级):")
                            print()
                            if choice_county == "q" or choice_county == "Q":
                                exit_flag = True
                            elif choice_county == "b" or choice_county == "b":
                                break  # 跳出整个第3层循环,重新进行第2层循环(选择城市)
                            elif choice_county.isdigit():
                                choice_county = int(choice_county)
                                county_list = China[province_list[choice_province - 1]][city_list[choice_city - 1]] # 县列表
                                if choice_county >= 1 and choice_county <= len(county_list):
                                    print("---------------------------------")
                                    print("您现在的位置是:", province_list[choice_province-1],city_list[choice_city-1],county_list[choice_county-1])
                                    print("---------------------------------")
                                    exit_flag = True
                                else:
                                    print("您输入的县序号不存在")
                                    print()
                            else:
                                print("您输入的县序号不存在")
                                print()
                                continue
                    else:
                        print("您输入的城市序号不存在")
                        print()
                        continue
                else:
                    print("您输入的城市序号不存在")
                    print()
                    continue
        else:
            print("您输入的省份序号不存在")
            print()
    else:
        print("您输入的省份序号不存在")
        print()
        continue

 最终版本:

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# 三级菜单

menu = {
    '北京': {
        '海淀': {
            '五道口': {
                'soho': {},
                '网易': {},
                'google': {}
            },
            '中关村': {
                '爱奇艺': {},
                '汽车之家': {},
                'youku': {},
            },
            '上地': {
                '百度': {},
            },
        },
        '昌平': {
            '沙河': {
                '老男孩': {},
                '北航': {},
            },
            '天通苑': {},
            '回龙观': {},
        },
        '朝阳': {},
        '东城': {},
    },
    '上海': {
        '闵行': {
            "人民广场": {
                '炸鸡店': {}
            }
        },
        '闸北': {
            '火车站': {
                '携程': {}
            }
        },
        '浦东': {},
    },
    '山东': {},
}

current_layer = menu  # 最高层次为menu(是一个字典)
layer_list = []  # 存放每次进入的层次,用于退回上层
while True:
    for k in current_layer:  # 遍历字典key
        print("
", k)
    choice = input("
33[34;1m请输入您要前往的地址(输入q退出,输入b返回上级)>>>33[0m").strip()
    if choice == 'q' or choice == 'Q':  # 可从任意一层退出程序
        break
    elif choice == 'b' or choice == 'B':  # 可从任意一层往回退到上一层
        if not layer_list:
            print("
33[31;1m到顶了,哥33[0m
")
        else:
            current_layer = layer_list.pop()
    elif choice not in current_layer:
        print("
33[31;1m输入有误,请重新输入33[0m
")
    else:
        layer_list.append(current_layer)  # 在列表末尾追加当前层次(是一个字典)
        current_layer = current_layer[choice]  # 下一个层次(也就是下一次要遍历的字典)
        if not current_layer:
            print("
33[31;1m到底了,哥33[0m")
View Code

二、购物车程序

数据结构:
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998},
......
]
View Code
功能要求:

1、启动程序后,输入用户名密码后,让用户输入工资,然后打印商品列表

2、允许用户根据商品编号购买商品

3、用户选择商品后,检测余额是否够,够就直接扣款,不够就提醒

4、可随时退出,退出时,打印已购买商品和余额

5、在用户使用过程中, 关键输出,如余额,商品已加入购物车等消息,需高亮显示

扩展需求:

1、用户下一次登录后,输入用户名密码,直接回到上次的状态,即上次消费的余额什么的还是那些,再次登录可继续购买

2、允许查询之前的消费记录

1.0版本

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 
 4 goods = [
 5     {"name": "电脑", "price": 3999},
 6     {"name": "鼠标", "price": 200},
 7     {"name": "游艇", "price": 2000},
 8     {"name": "美女", "price": 998},
 9     {"name": "T恤", "price": 599},
10 ]
11 
12 shopping_carts = []  # 初始购物车为空
13 money = 0  # 初始工资为空
14 money += int(input("请输入您的工资:"))  # 只能输入数字
15 exit_flag = False
16 
17 while not exit_flag:
18     print("
------------商品列表-----------
")  # 商品列表
19     for index, product in enumerate(goods, 1):
20         print("%s.%s %d" % (index, product['name'], product['price']))
21     print("
-------------------------------
")
22     product_id = input("请输入您要购买的商品编号(输入q可退出):")
23     if product_id.isdigit():
24         product_id = int(product_id)
25         if product_id >= 1 and product_id <= len(goods):
26             if money >= goods[product_id - 1]['price']:
27                 money -= goods[product_id - 1]['price']
28                 shopping_carts.append(goods[product_id - 1]['name'])
29                 print("
33[31;1m%s已加入购物车!33[1m
" % (goods[product_id - 1]['name']))
30             else:
31                 print("
33[31;1m抱歉,%s加入购物车失败!工资余额不足!33[1m
" % (goods[product_id - 1]['name']))
32                 # exit_flag =True
33         else:
34             print("商品标号有误,请重新输入")
35     elif product_id == "q":
36         if len(shopping_carts) > 0:
37             print("
33[31;1m您添加到购物车的商品如下:33[1m
")
38             for index, product_carts in enumerate(shopping_carts, 1):
39                 print("%s. %s" % (index, product_carts))
40         else:
41             print("
您的购物车为空!")
42         print("
33[31;1m您的工资余额为:%s 元!33[1m
" % (money))
43         exit_flag = True
44     else:
45         pass
View Code

1.1版本

#!/usr/bin/env python
# -*- coding:utf-8 -*-

goods = [
    {"name": "电脑", "price": 3999},
    {"name": "鼠标", "price": 200},
    {"name": "游艇", "price": 2000},
    {"name": "美女", "price": 998},
    {"name": "T恤", "price": 599},
]

exit_flag = False
shopping_carts = []  # 初始购物车为空
money = 0  # 初始工资为空

while True:
    salary = input("
请输入您的工资:")  # 工资只能是数字
    if salary.isdigit():
        money += int(salary)
        break
    else:
        print("
您的工资只能是数字")
        continue

while not exit_flag:
    print("
------------商品列表-----------
")  # 商品列表
    for index, product in enumerate(goods, 1):
        print("%s.%s %d" % (index, product['name'], product['price']))
    print("
-------------------------------
")
    product_id = input("请输入您要购买的商品编号(输入q可退出):")
    if product_id.isdigit():
        product_id = int(product_id)
        if product_id >= 1 and product_id <= len(goods):
            if money >= goods[product_id - 1]['price']:
                money -= goods[product_id - 1]['price']
                shopping_carts.append(goods[product_id - 1]['name'])
                print("
33[31;1m%s已加入购物车!33[1m
" % (goods[product_id - 1]['name']))
            else:
                print("
33[31;1m抱歉,%s加入购物车失败!工资余额不足!33[1m
" % (goods[product_id - 1]['name']))
                # exit_flag =True
        else:
            print("商品标号有误,请重新输入")
    elif product_id == "q":
        if len(shopping_carts) > 0:
            print("
33[31;1m您添加到购物车的商品如下:33[1m
")
            shopping_carts_delRepeat = list(set(shopping_carts))  # 购物车列表去重
            for index, product_carts in enumerate(shopping_carts_delRepeat, 1):
                print("%s. %s * %d" % (index, product_carts, shopping_carts.count(product_carts)))  # 显示同一商品数量
        else:
            print("
您的购物车为空!")
        print("
33[31;1m您的工资余额为:%s 元!33[1m
" % (money))
        exit_flag = True
    else:
        print("
输入有误,请重新输入")
View Code

1.2版本

userinfo.txt:

alex:456:0:400
wss:123:0:1150
jay:789:1:0
View Code

shopping_history.txt:

wss|2018-05-20 12:10:08|电脑
wss|2018-05-20 14:10:09|电脑
wss|2018-05-21 17:11:08|电脑
jay|2018-05-22 19:13:08|电脑
alex|2018-05-23 17:15:08|鼠标
wss|2018-05-23 19:06:24|鼠标
wss|2018-05-23 19:06:57|鼠标
wss|2018-05-23 19:11:46|鼠标
wss|2018-05-23 19:14:12|鼠标
wss|2018-05-23 19:14:30|鼠标
wss|2018-05-23 19:15:17|鼠标
alex|2018-05-23 19:16:12|鼠标
alex|2018-05-23 19:16:51|鼠标
View Code

README.txt

user_info.txt

    存储用户名、密码、锁定状态、工资余额

    wss:123:1:5800
    alex:456:0:55000
    jay:789:0:0
    
    用户名:密码:锁定状态(1代表锁定,0代表未锁定):工资余额
    
    wss是输错密码次数过多,被锁定的用户。
    alex是之前登陆过的用户,登陆之后可以看到工资余额,可继续购买。
    jay是从未登陆过的新用户,登陆之后需要输入工资,然后才能购买。
    
    
shopping_history.txt

    存储消费记录
    
    wss|2018-05-20 12:10:08|电脑
    wss|2018-05-20 14:10:09|电脑
    wss|2018-05-21 17:11:08|电脑
    jay|2018-05-22 19:13:08|电脑
    alex|2018-05-23 17:15:08|鼠标
    wss|2018-05-23 19:06:24|鼠标
    wss|2018-05-23 19:06:57|鼠标
    
    买家用户名|日期|商品名称
    
shoping.py

    主程序
    
    -------------------------------
    
    请输入用户名:alex

    请输入密码:456

    --------欢迎 alex 登陆商城--------

    您上次购物后的余额为:350 元!


    ------------商品列表------------

    1.电脑 4000
    2.鼠标 200
    3.游艇 20000
    4.美女 1000
    5.T恤 50

    -------------------------------

    【商品编号】购买商品
    【h】消费记录
    【m】余额查询
    【q】退出商城

    -------------------------------

    请输入您要的操作:h
    
    ---------您的消费记录----------

    用户 alex 2018-05-23 17:15:08 购买了 鼠标
    用户 alex 2018-05-23 19:16:12 购买了 鼠标
    用户 alex 2018-05-23 19:16:51 购买了 鼠标
    用户 alex 2018-05-23 19:16:52 购买了 鼠标
    用户 alex 2018-05-23 19:18:00 购买了 T恤
    用户 alex 2018-05-23 22:35:06 购买了 鼠标
    用户 alex 2018-05-25 18:12:41 购买了 鼠标
    用户 alex 2018-05-25 18:16:25 购买了 电脑
    用户 alex 2018-05-25 18:31:56 购买了 电脑
    用户 alex 2018-05-25 18:34:44 购买了 鼠标
    用户 alex 2018-05-25 18:36:02 购买了 鼠标
    用户 alex 2018-05-26 20:00:34 购买了 鼠标
    用户 alex 2018-05-26 20:00:37 购买了 美女
    用户 alex 2018-05-26 20:00:38 购买了 T恤

    -------------------------------
    
    请输入您要的操作:m

    您的工资余额为:350 元!
    
    -------------------------------
    
    请输入您要的操作:5

    T恤已购买成功!
    
    -------------------------------
    
    请输入您要的操作:q
    
    您本次没有购买东西!

    您的工资余额为:350 元!
    
    -------------------------------
    
View Code

shopping.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import os
import time


def select_user_info():
    # 读取用户信息文件,取出用户名、密码、锁定状态、余额组成一个用户信息字典user_info_dict
    with open(user_info_f_name, 'r', encoding='utf-8') as user_info_f:
        for line in user_info_f:  # 用户信息字符串
            user_info_list = line.strip().split(':')  # 将字符串转换为列表
            # print(user_info_list) # 用户信息列表
            _username = user_info_list[0].strip()  # 用户名
            _password = user_info_list[1].strip()  # 密码
            _lock = int(user_info_list[2].strip())  # 锁定状态,int类型(0代表未锁定,1代表锁定)
            _money = user_info_list[3].strip()  # 余额
            user_info_dict[_username] = {'password': _password, 'lock': _lock, 'money': _money}  # 将列表转换为字典
            # print(user_info_dict) # 用户信息字典


def update_user_info():
    # 修改用户信息后,更新user_info.txt文件内容
    with open(user_info_f_temp_name, "w", encoding="utf-8") as user_info_f_temp:
        for user in user_info_dict:  # 将字典转换为列表
            user_info_list_new = [user, str(user_info_dict[user]['password']), str(user_info_dict[user]['lock']),
                                  str(user_info_dict[user]['money'])]
            # print(user_info_list_new) # 更新后的用户信息列表
            user_info_str = ":".join(user_info_list_new)  # 将列表转换为字符串
            # print(user_str) # 更新后的用户信息字符串
            user_info_f_temp.write(user_info_str + "
")
    os.replace(user_info_f_temp_name, user_info_f_name)


def product_list():
    # 商品列表
    print("
------------商品列表------------
")  # 商品列表
    for index, product in enumerate(goods, 1):
        print("%s.%s %d" % (index, product['name'], product['price']))
    print("
-------------------------------")


def select_shopping_history():
    # 读取消费记录
    with open(shopping_history_f_name, "r", encoding="utf-8") as shopping_history_f:
        print("
------------消费记录-----------
")
        for line in shopping_history_f:
            shopping_history_list = line.strip().split('|')
            # print(shopping_history_list)
            _username = shopping_history_list[0].strip()
            _time = shopping_history_list[1].strip()
            _product = shopping_history_list[2].strip()
            if username in shopping_history_list:
                print("用户 {0} {1} 购买了 {2}".format(_username, _time, _product))
            else:
                pass
        print("
-------------------------------")


def update_shopping_history():
    # 更新消费记录
    now_time = time.strftime('%Y-%m-%d %H:%M:%S')
    with open(shopping_history_f_name, "a", encoding="utf-8") as shopping_history_f:
        shopping_history_f.write("
%s|%s|%s" % (username, now_time, goods[product_id - 1]['name']))


# 商品信息
goods = [
    {"name": "电脑", "price": 4000},
    {"name": "鼠标", "price": 200},
    {"name": "游艇", "price": 20000},
    {"name": "美女", "price": 1000},
    {"name": "T恤", "price": 50},
]

# 菜单栏
choice_info = """
【商品编号】购买商品
【h】消费记录
【m】余额查询
【q】退出商城

-------------------------------
"""

shopping_carts = []  # 初始购物车为空
user_info_dict = {}  # 初始化用户信息字典为空
user_info_f_name = "user_info.txt"  # 用户信息文件名
user_info_f_temp_name = "user_info.txt.temp"  # 用户信息临时文件名
shopping_history_f_name = "shopping_history.txt"  # 消费记录
exit_flag = False
count = 0

# 主程序开始
select_user_info()  # 读取用户信息文件,组成user_info_dict字典
while count < 3 and not exit_flag:
    username = input('
请输入用户名:')
    if username not in user_info_dict:
        count += 1
        print("
用户名错误")
    elif user_info_dict[username]['lock'] > 0:
        print("
用户已被锁定,请联系管理员解锁后重新尝试")
        break
    else:
        while count < 3 and not exit_flag:
            password = input('
请输入密码:')
            if password == user_info_dict[username]['password']:
                print("
--------欢迎%s登陆本商城--------" % (username))
                if int(user_info_dict[username]['money']) == 0:  # money = 0表示是首次登陆的用户
                    while True:
                        money = input("
请输入您的工资:")  # 工资只能是数字
                        if money.isdigit():
                            money = int(money)
                            # print(money)
                            break
                        else:
                            print("
您的工资只能是数字")
                            continue
                else:
                    money = int(user_info_dict[username]['money'])
                    print("
33[31;1m您上次购物后的余额为:%s 元!33[1m
" % (money))
                while not exit_flag:
                    product_list()  # 打印商品列表
                    print(choice_info)  # 选择信息
                    product_id = input("请输入您要的操作:")
                    if product_id.isdigit():
                        product_id = int(product_id)
                        if product_id >= 1 and product_id <= len(goods):
                            if money >= goods[product_id - 1]['price']:
                                money -= goods[product_id - 1]['price']
                                shopping_carts.append(goods[product_id - 1]['name'])
                                print("
33[31;1m%s已购买成功!33[1m
" % (goods[product_id - 1]['name']))
                                update_shopping_history()  # 写入消费记录文件
                                user_info_dict[username]['money'] = money
                                update_user_info()  # 更新工资余额到文件
                            else:
                                print(
                                    "
33[31;1m抱歉,%s购买失败!工资余额不足!33[1m
" % (goods[product_id - 1]['name']))
                        else:
                            print("商品标号有误,请重新输入")
                    elif product_id == "q":
                        if len(shopping_carts) > 0:
                            print("
33[31;1m您本次购买的商品及商品数量如下:33[1m
")
                            shopping_carts_delRepeat = list(set(shopping_carts))  # 购物车列表去重
                            for index, product_carts in enumerate(shopping_carts_delRepeat, 1):
                                print("%s. %s * %d" % (
                                    index, product_carts, shopping_carts.count(product_carts)))  # 显示同一商品数量
                        else:
                            print("
您本次没有购买东西!")
                        print("
33[31;1m您的工资余额为:%s 元!33[1m
" % (money))
                        # user_info_dict[username]['money'] = money
                        # update_user_info()  # 更新工资余额到文件
                        exit_flag = True
                    elif product_id == "h":
                        select_shopping_history()
                        choice_continue = input("
回到菜单栏(直接按回车):")
                        if choice_continue == 'y' or choice_continue == "Y" or choice_continue == "":
                            continue
                        else:
                            print("
操作失误,强制退出!")
                            exit_flag = True
                    elif product_id == "m":
                        print("
33[31;1m您的工资余额为:%s 元!33[1m
" % (money))
                        # user_info_dict[username]['money'] = money
                        # update_user_info()  # 更新工资余额到文件
                        choice_continue = input("
回到菜单栏(直接按回车):")
                        if choice_continue == 'y' or choice_continue == "Y" or choice_continue == "":
                            continue
                        else:
                            print("
操作失误,强制退出!")
                            exit_flag = True
                    else:
                        print("
输入有误,请重新输入")
            else:
                count += 1
                print('
密码错误')
                continue
    if count >= 3:  # 尝试次数大于等于3时锁定用户
        if username == "":
            print("
您输入的错误次数过多,且用户为空")
        elif username not in user_info_dict:
            print("
您输入的错误次数过多,且用户 %s 不存在" % username)
        else:
            user_info_dict[username]['lock'] += 1  # 修改用户字典(锁定状态设为1)
            # print(user_info_dict) # 更新后的用户信息字典
            update_user_info()  # 更新user_info.txt文件内容
            print("
您输入的错误次数过多,%s 已经被锁定" % username)
View Code
#!/usr/bin/env python
# -*- coding:utf-8 -*-

import os
import time


def select_user_info():
    # 读取用户信息文件,取出用户名、密码、锁定状态、余额组成一个用户信息字典user_info_dict
    with open(user_info_f_name, 'r', encoding='utf-8') as user_info_f:
        for line in user_info_f:  # 用户信息字符串
            user_info_list = line.strip().split(':')  # 将字符串转换为列表
            # print(user_info_list) # 用户信息列表
            _username = user_info_list[0].strip()  # 用户名
            _password = user_info_list[1].strip()  # 密码
            _lock = int(user_info_list[2].strip())  # 锁定状态,int类型(0代表未锁定,1代表锁定)
            _money = user_info_list[3].strip()  # 余额
            user_info_dict[_username] = {'password': _password, 'lock': _lock, 'money': _money}  # 将列表转换为字典
            # print(user_info_dict) # 用户信息字典


def update_user_info():
    # 修改用户信息后,更新user_info.txt文件内容
    with open(user_info_f_temp_name, "w", encoding="utf-8") as user_info_f_temp:
        for user in user_info_dict:  # 将字典转换为列表
            user_info_list_new = [user, str(user_info_dict[user]['password']), str(user_info_dict[user]['lock']),
                                  str(user_info_dict[user]['money'])]
            # print(user_info_list_new) # 更新后的用户信息列表
            user_info_str = ":".join(user_info_list_new)  # 将列表转换为字符串
            # print(user_str) # 更新后的用户信息字符串
            user_info_f_temp.write(user_info_str + "
")
    os.replace(user_info_f_temp_name, user_info_f_name)


def product_list():
    # 商品列表
    print("
------------商品列表------------
")  # 商品列表
    for index, product in enumerate(goods, 1):
        print("%s.%s %d" % (index, product['name'], product['price']))
    print("
-------------------------------")


def select_shopping_history():
    # 读取消费记录
    with open(shopping_history_f_name, "r", encoding="utf-8") as shopping_history_f:
        print("
---------您的消费记录----------
")
        for line in shopping_history_f:
            shopping_history_list = line.strip().split('|')
            # print(shopping_history_list)
            _username = shopping_history_list[0].strip()
            _time = shopping_history_list[1].strip()
            _product = shopping_history_list[2].strip()
            if username in shopping_history_list:
                print("用户 {0} {1} 购买了 {2}".format(_username, _time, _product))
            else:
                pass
        print("
-------------------------------")


def update_shopping_history():
    # 更新消费记录
    now_time = time.strftime('%Y-%m-%d %H:%M:%S')
    with open(shopping_history_f_name, "a", encoding="utf-8") as shopping_history_f:
        shopping_history_f.write("
%s|%s|%s" % (username, now_time, goods[product_id - 1]['name']))


# 商品信息
goods = [
    {"name": "电脑", "price": 4000},
    {"name": "鼠标", "price": 200},
    {"name": "游艇", "price": 20000},
    {"name": "美女", "price": 1000},
    {"name": "T恤", "price": 50},
]

# 菜单栏
choice_info = """
【商品编号】购买商品
【h】消费记录
【m】余额查询
【q】退出商城

-------------------------------
"""

shopping_carts = []  # 初始购物车为空
user_info_dict = {}  # 初始化用户信息字典为空
user_info_f_name = "user_info.txt"  # 用户信息文件名
user_info_f_temp_name = "user_info.txt.temp"  # 用户信息临时文件名
shopping_history_f_name = "shopping_history.txt"  # 消费记录
exit_flag = False
count = 0

# 主程序开始
select_user_info()  # 读取用户信息文件,组成user_info_dict字典
while count < 3 and not exit_flag:
    username = input('
请输入用户名:')
    if username not in user_info_dict:
        count += 1
        print("
用户名错误")
    elif user_info_dict[username]['lock'] > 0:
        print("
用户已被锁定,请联系管理员解锁后重新尝试")
        break
    else:
        while count < 3 and not exit_flag:
            password = input('
请输入密码:')
            if password == user_info_dict[username]['password']:
                print("
--------欢迎%s登陆本商城--------" % (username))
                if int(user_info_dict[username]['money']) == 0:  # money = 0表示是首次登陆的用户
                    while True:
                        money = input("
请输入您的工资:")  # 工资只能是数字
                        if money.isdigit():
                            money = int(money)
                            # print(money)
                            break
                        else:
                            print("
您的工资只能是数字")
                            continue
                else:
                    money = int(user_info_dict[username]['money'])
                    print("
33[31;1m您上次购物后的余额为:%s 元!33[0m
" % (money))
                while not exit_flag:
                    product_list()  # 打印商品列表
                    print(choice_info)  # 选择信息
                    product_id = input("请输入您要的操作:")
                    if product_id.isdigit():
                        product_id = int(product_id)
                        if product_id >= 1 and product_id <= len(goods):
                            if money >= goods[product_id - 1]['price']:
                                money -= goods[product_id - 1]['price']
                                shopping_carts.append(goods[product_id - 1]['name'])
                                print("
33[31;1m%s已购买成功!33[0m
" % (goods[product_id - 1]['name']))
                                update_shopping_history()  # 写入消费记录文件
                                user_info_dict[username]['money'] = money
                                update_user_info()  # 更新工资余额到文件
                            else:
                                print("
33[31;1m抱歉,%s购买失败!工资余额不足!33[0m" % (goods[product_id - 1]['name']))
                        else:
                            print("商品标号有误,请重新输入")
                    elif product_id == "q":
                        if len(shopping_carts) > 0:
                            print("
33[31;1m您本次购买的商品及商品数量如下:33[0m
")
                            shopping_carts_delRepeat = list(set(shopping_carts))  # 购物车列表去重
                            for index, product_carts in enumerate(shopping_carts_delRepeat, 1):
                                print("%s. %s * %d" % (
                                    index, product_carts, shopping_carts.count(product_carts)))  # 显示同一商品数量
                        else:
                            print("
您本次没有购买东西!")
                        print("
33[31;1m您的工资余额为:%s 元!33[0m
" % (money))
                        # user_info_dict[username]['money'] = money
                        # update_user_info()  # 更新工资余额到文件
                        exit_flag = True
                    elif product_id == "h":
                        select_shopping_history()
                        choice_continue = input("
回到菜单栏(直接按回车):")
                        if choice_continue == 'y' or choice_continue == "Y" or choice_continue == "":
                            continue
                        else:
                            print("
操作失误,强制退出!")
                            exit_flag = True
                    elif product_id == "m":
                        print("
33[31;1m您的工资余额为:%s 元!33[0m
" % (money))
                        # user_info_dict[username]['money'] = money
                        # update_user_info()  # 更新工资余额到文件
                        choice_continue = input("
回到菜单栏(直接按回车):")
                        if choice_continue == 'y' or choice_continue == "Y" or choice_continue == "":
                            continue
                        else:
                            print("
操作失误,强制退出!")
                            exit_flag = True
                    else:
                        print("
输入有误,请重新输入")
            else:
                count += 1
                print('
密码错误')
                continue
    if count >= 3:  # 尝试次数大于等于3时锁定用户
        if username == "":
            print("
您输入的错误次数过多,且用户为空")
        elif username not in user_info_dict:
            print("
您输入的错误次数过多,且用户 %s 不存在" % username)
        else:
            user_info_dict[username]['lock'] += 1  # 修改用户字典(锁定状态设为1)
            # print(user_info_dict) # 更新后的用户信息字典
            update_user_info()  # 更新user_info.txt文件内容
            print("
您输入的错误次数过多,%s 已经被锁定" % username)
View Code

 1.3版本:

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import os
import time


def select_user_info():
    # 读取用户信息文件,取出用户名、密码、锁定状态、余额组成一个用户信息字典user_info_dict
    with open(user_info_f_name, 'r', encoding='utf-8') as user_info_f:
        for line in user_info_f:  # 用户信息字符串
            user_info_list = line.strip().split(':')  # 将字符串转换为列表
            # print(user_info_list) # 用户信息列表
            _username = user_info_list[0].strip()  # 用户名
            _password = user_info_list[1].strip()  # 密码
            _lock = int(user_info_list[2].strip())  # 锁定状态,int类型(0代表未锁定,1代表锁定)
            _money = user_info_list[3].strip()  # 余额
            user_info_dict[_username] = {'password': _password, 'lock': _lock, 'money': _money}  # 将列表转换为字典
            # print(user_info_dict) # 用户信息字典


def update_user_info():
    # 修改用户信息后,更新user_info.txt文件内容
    with open(user_info_f_temp_name, "w", encoding="utf-8") as user_info_f_temp:
        for user in user_info_dict:  # 将字典转换为列表
            user_info_list_new = [user, str(user_info_dict[user]['password']), str(user_info_dict[user]['lock']),
                                  str(user_info_dict[user]['money'])]
            # print(user_info_list_new) # 更新后的用户信息列表
            user_info_str = ":".join(user_info_list_new)  # 将列表转换为字符串
            # print(user_str) # 更新后的用户信息字符串
            user_info_f_temp.write(user_info_str + "
")
    os.replace(user_info_f_temp_name, user_info_f_name)


def product_list():
    # 商品列表
    print("
------------商品列表------------
")  # 商品列表
    for index, product in enumerate(goods, 1):
        print("%s.%s %d" % (index, product['name'], product['price']))
    print("
-------------------------------")


def select_shopping_history():
    # 读取消费记录
    with open(shopping_history_f_name, "r", encoding="utf-8") as shopping_history_f:
        print("
---------您的消费记录----------
")
        for line in shopping_history_f:
            shopping_history_list = line.strip().split('|')
            # print(shopping_history_list)
            _username = shopping_history_list[0].strip()
            _time = shopping_history_list[1].strip()
            _product = shopping_history_list[2].strip()
            if username in shopping_history_list:
                print("用户 {0} {1} 购买了 {2}".format(_username, _time, _product))
            else:
                pass
        print("
-------------------------------")


def update_shopping_history():
    # 更新消费记录
    now_time = time.strftime('%Y-%m-%d %H:%M:%S')
    with open(shopping_history_f_name, "a", encoding="utf-8") as shopping_history_f:
        shopping_history_f.write("
%s|%s|%s" % (username, now_time, goods[product_id - 1]['name']))


# 商品信息
goods = [
    {"name": "电脑", "price": 4000},
    {"name": "鼠标", "price": 200},
    {"name": "游艇", "price": 20000},
    {"name": "美女", "price": 1000},
    {"name": "T恤", "price": 50},
]

# 菜单栏
choice_info = """
【商品编号】购买商品
【h】消费记录
【m】余额查询
【q】退出商城

-------------------------------
"""

shopping_carts = []  # 初始购物车为空
user_info_dict = {}  # 初始化用户信息字典为空
user_info_f_name = "user_info.txt"  # 用户信息文件名
user_info_f_temp_name = "user_info.txt.temp"  # 用户信息临时文件名
shopping_history_f_name = "shopping_history.txt"  # 消费记录
count = 0

# 主程序开始
select_user_info()  # 读取用户信息文件,组成user_info_dict字典
while count < 3:
    username = input('
33[34;1m请输入用户名:33[0m').strip()
    if username not in user_info_dict:
        count += 1
        print("
33[31;1m用户名错误33[0m")
    elif user_info_dict[username]['lock'] > 0:
        print("
33[31;1m%s 已被锁定,请联系管理员解锁后重新尝试33[0m" % (username))
        exit()
    else:
        while count < 3:
            password = input('
33[34;1m请输入密码:33[0m').strip()
            if password == user_info_dict[username]['password']:
                print("
--------欢迎 %s 登陆商城--------" % (username))
                if int(user_info_dict[username]['money']) == 0:  # money = 0表示是首次登陆的用户
                    while True:
                        money = input("
33[34;1m请输入您的工资:33[0m")  # 工资只能是数字
                        if money.isdigit():
                            money = int(money)
                            # print(money)
                            break
                        else:
                            print("
33[31;1m您的工资只能是数字33[0m")
                            continue
                else:
                    money = int(user_info_dict[username]['money'])
                    print("
33[31;1m您上次购物后的余额为:%s 元!33[0m
" % (money))
                while True:
                    product_list()  # 打印商品列表
                    print(choice_info)  # 选择信息
                    product_id = input("33[34;1m请输入您要的操作:33[0m").strip()
                    if product_id.isdigit():
                        product_id = int(product_id)
                        if product_id >= 1 and product_id <= len(goods):
                            if money >= goods[product_id - 1]['price']:
                                money -= goods[product_id - 1]['price']
                                shopping_carts.append(goods[product_id - 1]['name'])
                                print("
33[31;1m%s已购买成功!33[0m
" % (goods[product_id - 1]['name']))
                                update_shopping_history()  # 写入消费记录文件
                                user_info_dict[username]['money'] = money
                                update_user_info()  # 更新工资余额到文件
                            else:
                                print("
33[31;1m抱歉,%s购买失败!工资余额不足!33[0m" % (goods[product_id - 1]['name']))
                        else:
                            print("33[31;1m商品标号有误,请重新输入33[0m")
                    elif product_id == "q":
                        if len(shopping_carts) > 0:
                            print("
33[31;1m您本次购买的商品及商品数量如下:33[0m
")
                            shopping_carts_delRepeat = list(set(shopping_carts))  # 购物车列表去重
                            for index, product_carts in enumerate(shopping_carts_delRepeat, 1):
                                print("%s. %s * %d" % (
                                    index, product_carts, shopping_carts.count(product_carts)))  # 显示同一商品数量
                        else:
                            print("
33[31;1m您本次没有购买东西!33[0m")
                        print("
33[31;1m您的工资余额为:%s 元!33[0m
" % (money))
                        exit()
                    elif product_id == "h":
                        select_shopping_history()
                        choice_continue = input("
33[34;1m回到菜单栏(直接按回车):33[0m").strip()
                        if choice_continue == 'y' or choice_continue == "Y" or choice_continue == "":
                            continue
                        else:
                            print("
33[31;1m操作失误,强制退出!33[0m")
                            exit()
                    elif product_id == "m":
                        print("
33[31;1m您的工资余额为:%s 元!33[0m
" % (money))
                        choice_continue = input("
33[34;1m回到菜单栏(直接按回车):33[0m").strip()
                        if choice_continue == 'y' or choice_continue == "Y" or choice_continue == "":
                            continue
                        else:
                            print("
33[31;1m操作失误,强制退出!33[0m")
                            exit()
                    else:
                        print("
33[31;1m输入有误,请重新输入33[0m")
            else:
                count += 1
                print('
33[31;1m密码错误33[0m')
                continue
    if count >= 3:  # 尝试次数大于等于3时锁定用户
        if not username:
            print("
33[31;1m您输入的错误次数过多,且用户为空33[0m")
        elif username not in user_info_dict:
            print("
33[31;1m您输入的错误次数过多,且用户 %s 不存在33[0m" % username)
        else:
            user_info_dict[username]['lock'] += 1  # 修改用户字典(锁定状态设为1)
            # print(user_info_dict) # 更新后的用户信息字典
            update_user_info()  # 更新user_info.txt文件内容
            print("
33[31;1m您输入的错误次数过多,%s 已经被锁定33[0m" % username)
View Code

 最终版本:

#!/usr/bin/env python
# -*- coding:utf-8 -*-

"""
@Version: V1.0
@Author: wushuaishuai
@License: Apache Licence
@Contact: 434631143@qq.com
@Site: http://www.cnblogs.com/wushuaishuai/
@Software: PyCharm
@File: shopping.py
@Time: 2018/05/26 20:39
             ┏┓      ┏┓
            ┏┛┻━━━┛┻┓
            ┃      ☃      ┃
            ┃  ┳┛  ┗┳  ┃
            ┃      ┻      ┃
            ┗━┓      ┏━┛
                ┃      ┗━━━┓
                ┃  神兽保佑    ┣┓
                ┃ 永无BUG!   ┏┛
                ┗┓┓┏━┳┓┏┛
                  ┃┫┫  ┃┫┫
                  ┗┻┛  ┗┻┛
"""

import os
import time


def select_user_info():
    # 读取用户信息文件,取出用户名、密码、锁定状态、余额组成一个用户信息字典user_info_dict
    with open(user_info_f_name, 'r', encoding='utf-8') as user_info_f:
        for line in user_info_f:  # 用户信息字符串
            user_info_list = line.strip().split(':')  # 将字符串转换为列表
            # print(user_info_list) # 用户信息列表
            _username = user_info_list[0].strip()  # 用户名
            _password = user_info_list[1].strip()  # 密码
            _lock = int(user_info_list[2].strip())  # 锁定状态,int类型(0代表未锁定,1代表锁定)
            _money = user_info_list[3].strip()  # 余额
            user_info_dict[_username] = {'password': _password, 'lock': _lock, 'money': _money}  # 将列表转换为字典
            # print(user_info_dict) # 用户信息字典


def update_user_info():
    # 修改用户信息后,更新user_info.txt文件内容
    with open(user_info_f_temp_name, "w", encoding="utf-8") as user_info_f_temp:
        for user in user_info_dict:  # 将字典转换为列表
            user_info_list_new = [user, str(user_info_dict[user]['password']), str(user_info_dict[user]['lock']),
                                  str(user_info_dict[user]['money'])]
            # print(user_info_list_new) # 更新后的用户信息列表
            user_info_str = ":".join(user_info_list_new)  # 将列表转换为字符串
            # print(user_str) # 更新后的用户信息字符串
            user_info_f_temp.write(user_info_str + "
")
    os.replace(user_info_f_temp_name, user_info_f_name)


def product_list():
    # 商品列表
    print("
------------商品列表------------
")  # 商品列表
    for index, product in enumerate(goods, 1):
        print("%s.%s %d" % (index, product['name'], product['price']))
    print("
-------------------------------")


def select_shopping_history():
    # 读取消费记录
    with open(shopping_history_f_name, "r", encoding="utf-8") as shopping_history_f:
        print("
---------您的消费记录----------
")
        for line in shopping_history_f:
            shopping_history_list = line.strip().split('|')
            # print(shopping_history_list)
            _username = shopping_history_list[0].strip()
            _time = shopping_history_list[1].strip()
            _product = shopping_history_list[2].strip()
            if username in shopping_history_list:
                print("用户 {0} {1} 购买了 {2}".format(_username, _time, _product))
            else:
                pass
        print("
-------------------------------")


def update_shopping_history():
    # 更新消费记录
    now_time = time.strftime('%Y-%m-%d %H:%M:%S')
    with open(shopping_history_f_name, "a", encoding="utf-8") as shopping_history_f:
        shopping_history_f.write("
%s|%s|%s" % (username, now_time, goods[product_id - 1]['name']))


# 商品信息
goods = [
    {"name": "电脑", "price": 4000},
    {"name": "鼠标", "price": 200},
    {"name": "游艇", "price": 20000},
    {"name": "美女", "price": 1000},
    {"name": "T恤", "price": 50},
]

# 菜单栏
choice_info = """
【商品编号】购买商品
【h】消费记录
【m】余额查询
【q】退出商城

-------------------------------
"""

shopping_carts = []  # 初始购物车为空
user_info_dict = {}  # 初始化用户信息字典为空
user_info_f_name = "user_info.txt"  # 用户信息文件名
user_info_f_temp_name = "user_info.txt.temp"  # 用户信息临时文件名
shopping_history_f_name = "shopping_history.txt"  # 消费记录
count = 0

# 主程序开始
select_user_info()  # 读取用户信息文件,组成user_info_dict字典
while count < 3:
    username = input('
33[34;1m请输入用户名:33[0m').strip()
    if username not in user_info_dict:
        count += 1
        print("
33[31;1m用户名错误33[0m")
    elif user_info_dict[username]['lock'] > 0:
        print("
33[31;1m%s 已被锁定,请联系管理员解锁后重新尝试33[0m" % (username))
        exit()
    else:
        while count < 3:
            password = input('
33[34;1m请输入密码:33[0m').strip()
            if password == user_info_dict[username]['password']:
                print("
--------欢迎 %s 登陆商城--------" % (username))
                if int(user_info_dict[username]['money']) == 0:  # money = 0表示是首次登陆的用户
                    while True:
                        money = input("
33[34;1m请输入您的工资:33[0m")  # 工资只能是数字
                        if money.isdigit():
                            money = int(money)
                            user_info_dict[username]['money'] = money
                            update_user_info()  # 更新工资余额到文件
                            # print(money)
                            break
                        else:
                            print("
33[31;1m您的工资只能是数字!33[0m")
                            continue
                else:
                    money = int(user_info_dict[username]['money'])
                    print("
33[31;1m您上次购物后的余额为:%s 元!33[0m
" % (money))
                while True:
                    product_list()  # 打印商品列表
                    print(choice_info)  # 选择信息
                    product_id = input("33[34;1m请输入您要的操作:33[0m").strip()
                    if product_id.isdigit():
                        product_id = int(product_id)
                        if product_id >= 1 and product_id <= len(goods):
                            if money >= goods[product_id - 1]['price']:
                                money -= goods[product_id - 1]['price']
                                shopping_carts.append(goods[product_id - 1]['name'])
                                print("
33[31;1m%s已购买成功!33[0m
" % (goods[product_id - 1]['name']))
                                update_shopping_history()  # 写入消费记录文件
                                user_info_dict[username]['money'] = money
                                update_user_info()  # 更新工资余额到文件
                            else:
                                print("
33[31;1m抱歉,%s购买失败!工资余额不足!33[0m" % (goods[product_id - 1]['name']))
                        else:
                            print("
33[31;1m商品编号有误,请重新输入!33[0m")
                    elif product_id == "q":
                        if len(shopping_carts) > 0:
                            print("
33[31;1m您本次购买的商品及商品数量如下:33[0m
")
                            shopping_carts_delRepeat = list(set(shopping_carts))  # 购物车列表去重
                            for index, product_carts in enumerate(shopping_carts_delRepeat, 1):
                                print("%s. %s * %d" % (
                                    index, product_carts, shopping_carts.count(product_carts)))  # 显示同一商品数量
                        else:
                            print("
33[31;1m您本次没有购买东西!33[0m")
                        print("
33[31;1m您的工资余额为:%s 元!33[0m
" % (money))
                        exit()
                    elif product_id == "h":
                        select_shopping_history()
                        choice_continue = input("
33[34;1m回到菜单栏(直接按回车):33[0m").strip()
                        if choice_continue == 'y' or choice_continue == "Y" or choice_continue == "":
                            continue
                        else:
                            print("
33[31;1m操作失误,强制退出!33[0m")
                            exit()
                    elif product_id == "m":
                        print("
33[31;1m您的工资余额为:%s 元!33[0m
" % (money))
                        choice_continue = input("
33[34;1m回到菜单栏(直接按回车):33[0m").strip()
                        if choice_continue == 'y' or choice_continue == "Y" or choice_continue == "":
                            continue
                        else:
                            print("
33[31;1m操作失误,强制退出!33[0m")
                            exit()
                    else:
                        print("
33[31;1m输入有误,请重新输入!33[0m")
            else:
                count += 1
                print('
33[31;1m密码错误33[0m')
                continue
    if count >= 3:  # 尝试次数大于等于3时锁定用户
        if not username:
            print("
33[31;1m您输入的错误次数过多,且用户为空!33[0m")
        elif username not in user_info_dict:
            print("
33[31;1m您输入的错误次数过多,且用户 %s 不存在!33[0m" % username)
        else:
            user_info_dict[username]['lock'] += 1  # 修改用户字典(锁定状态设为1)
            # print(user_info_dict) # 更新后的用户信息字典
            update_user_info()  # 更新user_info.txt文件内容
            print("
33[31;1m您输入的错误次数过多,%s 已经被锁定!33[0m" % username)
View Code
原文地址:https://www.cnblogs.com/wushuaishuai/p/8424746.html