购物车程序
#!/usr/bin/env python# -*- coding: utf-8 -*-# @Time : 2018/3/6 21:01# @Author : hyang# @Site :# @File : shop_cart.py# @Software: PyCharm"""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},......]功能要求：基础要求：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"""import os# 商品列表goods = [ { "name": "电脑", "price": 1999}, { "name": "鼠标", "price": 10}, { "name": "游艇", "price": 20}, { "name": "IPAD", "price": 1998}, { "name": "手机", "price": 998}, { "name": "玩具", "price": 50}, { "name": "教科书", "price": 100}]last_shop = [] # 上次购买数据last_bal = [] # 得到每次购买余额def is_shop(user): """ 判断该用户是否已消费数据 :param user: :return: """ flg = False if os.path.exists(r"user_shop.txt"): # 查询用户有购买记录 with open(r"user_shop.txt", "r", encoding='utf-8') as f: for line in f: if line.find(user) != -1: flg = True break else: # 创建空文件 with open(r"user_shop.txt", "w", encoding='utf-8') as f: f.write("") return flgdef login(): """ 用户登录 :return: """ err_cnt = 0 suc_user = '' # 返回成功登录用户 # 判断锁标志 while err_cnt < 3: user = input('输入用户名: ') pwd = input('输入密码: ') if user == 'alex' and pwd == '123': print('登录成功') suc_user = user break else: print('登录失败') err_cnt += 1 else: print('您登录失败已超过3次') return suc_userdef check_salary(): """ 检查收入 :return: """ while True: salary = input('输入工资: ') if salary.isdigit(): break else: print('工资输入错误，请重新输入！') return int(salary)def shop(user, salary): """ 用户购物 """ shop_cart = [] # 购物车 while True: print('-------商品列表--------') for index, value in enumerate(goods): print('商品编号:%s 商品名称:%s 商品价格:%s' % (index, value['name'], value['price'])) choice = input('输入商品编号:---输入q退出购买 ') if choice.isdigit(): choice = int(choice) if 0 <= choice < len(goods): price = goods[choice]['price'] if (salary - price) > 0: salary = salary - price shop_cart.append(goods[choice]) print('\033[1;32;40m购买商品编号:%s 购买商品名称:%s 购买商品价格:%s\033[0m' % (choice, goods[choice]['name'], goods[choice]['price'])) print('\033[1;32;40m工资余额=%s\033[0m' % salary) else: print('余额不足') continue else: print('商品编号不存在！') elif choice == 'q': print('\033[1;31;40m-------本次购物退出--------\033[0m') if len(shop_cart) > 0: print('-------本次购买商品列表--------') with open(r"user_shop.txt", "a+", encoding='utf-8') as f: f.write("user:%s\n" % user) for value in shop_cart: shop_info = '购买商品名称:%s|购买商品价格:%s' % (value['name'], value['price']) print('\033[1;32;40m%s\033[0m' % shop_info) f.write(shop_info + "\n") bal_info = '工资余额:%s' % salary print('\033[1;32;40m%s\033[0m'% bal_info) f.write(bal_info + "\n") breakdef get_shop(user): """ 读取文件得到用户已消费数据 :param user: :return: """ flg = False resume_goods = [] # 消费商品 with open(r"user_shop.txt", "r", encoding='utf-8') as f: for line in f: if line.find("购买") != -1: shop_li = line.split("|") resume_goods.append([shop_li[0].split(":")[1].strip(), shop_li[1].split(":")[1].strip()]) elif line.find("余额") != -1: last_bal.append(line.split(":")[1].strip()) print("\033[1;32;40m历史购物:%s\033[0m" % resume_goods) # 带绿色输出 print('\033[1;32;40m还剩下余额:%s\033[0m' % last_bal[-1]) # 带绿色输出if __name__ == '__main__': user = login() if user != '': print('{}登录成功'.format(user)) while True: action = input('输入c查询消费记录，输入b购买商品,输入q退出：') if action == 'q': print('\033[1;31;40m---退出程序------\033[0m') # 带红色输出 get_shop(user) break elif action == 'c': if is_shop(user): print("---查询之前的消费记录---") get_shop(user) else: print("---查询之前无消费记录---") elif action == 'b': if not is_shop(user): salary = check_salary() else: salary = int(last_bal[-1]) print('您工资现有:', salary) shop(user, salary)
输出结果
三级菜单程序
#!/usr/bin/env python3 # -*- coding: utf-8 -*-# @Time : 2018/3/1 9:38# @Author : hyang# @File : three_menu.py# @Software: PyCharm"""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"""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_menu = menu # 当前菜单last_menu = [] # 上层菜单prompt = "输入菜单名，进入子菜单\n 输入'b'，返回上层菜单\n 输入'q'，退出程序\n"while True: if len(current_menu) == 0: print('已经到最底层，该菜单下无节点') else: for k in current_menu: print('菜单->', k) input_str = input(prompt).strip() if input_str == 'q': print('退出程序') break elif input_str in current_menu: last_menu.append(current_menu) # 保存上一层菜单 current_menu = current_menu[input_str] # 保存当前层 elif input_str == 'b': if len(last_menu) != 0: current_menu = last_menu.pop() # 弹出上一层菜单 else: print('已经是顶层菜单') else: print('该节点菜单不存在') continue