代碼練習(xí)，購(gòu)物車

1. 高亮顯示提示

2. 啟動(dòng)程序后，先登錄，登錄成功則讓用戶輸入充值錢數(shù),然后打印商品列表，失敗則重新登錄，超過三次則退出程序

3. 允許用戶根據(jù)商品編號(hào)購(gòu)買商品

4. 用戶選擇商品后，檢測(cè)余額是否夠，夠就直接扣款，不夠就提醒

5. 可隨時(shí)退出，退出時(shí)，打印已購(gòu)買商品

#   -*- coding:utf-8 -*-

dic = {'alex': {'password': 'qwer', 'count': 0, 'balance': 0},
       'lilei': {'password': 'asdf', 'count': 0, 'balance': 0},
       'jim': {'password': 'zxcv', 'count': 0, 'balance': 0}}

goods = [
    {"name": "電腦", "price": 1999},
    {"name": "鼠標(biāo)", "price": 10},
    {"name": "游艇", "price": 20},
    {"name": "美女", "price": 998}, ]
shopping_cart = []
light_s = '\033[1;31;46m%s元\033[0m'
loop = True
while loop:
    f = open(file='blacklist.txt', mode='r', encoding='utf-8')
    blacklist = f.read()
    f.closed
    input_user = input('請(qǐng)輸入您的用戶名：').strip()
    if input_user in blacklist:
        print('很抱歉您的賬戶已被鎖定')
    else:
        if input_user in dic:
            input_password = input('請(qǐng)輸入您的密碼：').strip()
            if input_password == dic[input_user]['password']:
                print('登錄成功，您的賬戶余額還有', light_s % (dic[input_user]['balance']))
                recharge = input('是否進(jìn)行充值？請(qǐng)輸入充值的錢數(shù)，回車鍵繼續(xù)')
                if recharge.isdigit():
                    recharge = int(recharge)
                    dic[input_user]['balance'] += int(recharge)
                    print('當(dāng)前余額為:', light_s % (dic[input_user]['balance']))
                print('商品列表'.center(50, '-'))
                print('-序號(hào)-', '商品'.center(4, '-'), '價(jià)格'.center(4, '-'))
                while loop:
                    for index, i in enumerate(goods):
                        print(' %s    %s   %s ' % (index, i['name'], i['price']))
                    choice = input("請(qǐng)輸入您要購(gòu)買的商品序號(hào),按'q'鍵退出")
                    if choice.isdigit():
                        choice = int(choice)
                        if choice >= len(goods):
                            print('\033[1;31;46m您所選擇的商品不存在\033[0m')
                            continue
                        if dic[input_user]['balance'] >= int(goods[choice]['price']):
                            dic[input_user]['balance'] -= int(goods[choice]['price'])
                            print('購(gòu)買成功，花費(fèi)', light_s % (goods[choice]['price']), '余額還剩',
                                  light_s % dic[input_user]['balance'])
                            shopping_cart.append(goods[choice])
                        else:
                            print('余額不足，您的賬戶余額還有', light_s % (dic[input_user]['balance']))
                            recharge = input('是否進(jìn)行充值？請(qǐng)輸入充值的錢數(shù)，回車鍵繼續(xù)')
                            if recharge.isdigit():
                                recharge = int(recharge)
                                dic[input_user]['balance'] += int(recharge)
                                print('當(dāng)前余額為:', light_s % (dic[input_user]['balance']))

                    elif choice == 'q':
                        print('您購(gòu)買的商品列表清單如下')
                        for i in shopping_cart:
                            print(i['name'], i['price'])
                        print('\033[1;31;46m歡迎再來\033[0m')
                        loop = False
                    else:
                        print('\033[1;31;46m請(qǐng)輸入正確的序號(hào)\033[0m')

            else:
                print('\033[1;31;46m密碼錯(cuò)誤\033[0m')
                dic[input_user]['count'] += 1
                if dic[input_user]['count'] > 2:
                    f = open(file='blacklist.txt', mode='a', encoding='utf-8')
                    f.write('%s ' % input_user)
                    print('\033[1;31;46ml您的賬號(hào)已被加入黑名單\033[0m')
                    f.closed
                    break
        else:
            print('您輸入的用戶名不存在')