购物车程序（待完善）

#购物车程序

gongzi = input("请输入您的工资:")
if gongzi.isdigit():   #判断变量是否为正整数，包括0
    gongzi = int(gongzi)
else:
    print("无效的工资，退出")
    exit()

shangping = ['iphone','mac book','bike','book','pen']
buycars = []

print("\n目前有以下商品：\n")
for index,name in enumerate(shangping):
    print(index+1,"-", name)

while True:
    select = input("\n请输入您想购买的商品名称，按q退出:\n")
    if select in shangping:
        pass
    elif select == 'q':
        exit()
    else:
        print("对不起，您输入的商品不存在！请重新输入！\n")
        continue
    if select == 'iphone':
        if gongzi - 6800 >= 0:
            gongzi = int(gongzi) - 6800
            shangping.remove("iphone")
            buycars.append("iphone")
            print("\n购买成功！已将您的商品放入购物车！\n")
            print("目前余额：",end="")
            print("\033[1;32m")
            print(str(gongzi))
            print("\033[0m")
        else:
            print("\n对不起，您的余额不足.\n")
            print("目前余额：",end="")
            print("\033[1;31m")
            print(str(gongzi))
            print("\033[0m")
            continue
    elif select == 'mac book':

        if gongzi - 12000 >= 0:
            gongzi -= 12000
            shangping.remove("mac book")
            buycars.append("mac book")
            print("\n购买成功！已将您的商品放入购物车！\n")
            print("目前余额：",end="")
            print("\033[1;32m")
            print(str(gongzi))
            print("\033[0m")
        else:
            print("余额不足.\n")
            print("目前余额：",end="")
            print("\033[1;31m")
            print(str(gongzi))
            print("\033[0m")
            continue
    elif select == 'bike':

        if gongzi - 700 >= 0:
            shangping.remove("bike")
            buycars.append("bike")
            gongzi -= 700
            print("\n购买成功！已将您的商品放入购物车！\n")
            print("目前余额：",end="")
            print("\033[1;32m")
            print(str(gongzi))
            print("\033[0m")

        else:
            print("余额不足.\n")
            print("目前余额：",end="")
            print("\033[1;31m")
            print(str(gongzi))
            print("\033[0m")
    elif select == 'book':

        if gongzi -80 >= 0:
            shangping.remove("book")
            buycars.append("book")
            gongzi -= 80
            print("\n购买成功！已将您的商品放入购物车！\n")
            print("目前余额：",end="")
            print("\033[1;32m")
            print(str(gongzi))
            print("\033[0m")

        else:
            print("余额不足.\n")
            print("目前余额：",end="")
            print("\033[1;31m")
            print(str(gongzi))
            print("\033[0m")
    elif select == 'pen':

        if gongzi - 50 >= 0:
            shangping.remove("pen")
            buycars.append("pen")
            gongzi -= 50
            print("\n购买成功！已将您的商品放入购物车！\n")
            print("目前余额：",end="")
            print("\033[1;32m")
            print(str(gongzi))
            print("\033[0m")

        else:
            print("余额不足.\n")
            print("目前余额：",end="")
            print("\033[1;31m")
            print(str(gongzi))
            print("\033[0m")

    print("购物车内的商品有：")
    for buycar in buycars:
        print("-",buycar)
    print("共计："+str(len(buycars))+"件商品")
    print("余额：",gongzi,"\n")