python 商品购物车

Shopping_Cart=[]

commodity=[("iphone",5000),
("bike",200),
("book",100),
("computer",3000),
("car",10000),
]
salary=input("please input your salary:")

# print(commodity)
if salary.isdigit():
    salary=int(salary)
    while True:
        for index,item in enumerate(commodity):
            print(index,item)
        Use_choice = input("please choose you want to buy commodity num:")
        if Use_choice.isdigit():
            Use_choice=int(Use_choice)
            if Use_choice<len(commodity) and Use_choice>=0 :
                p_item=commodity[Use_choice]
                # print(p_item[1])
                if p_item[1]<= salary:
                    Shopping_Cart.append(p_item)
                    salary-=p_item[1]
                    print("Shopping_Cart added %s ,your current balance is 33[31;1m %s 33[0m" % (p_item,salary))
                else :
                    print("33[41;1m 余额不足,请重新选择 %s 33[0m" %salary)
            else:
                print("please iput correct product code 33[31;1m %s 33[0m" % Use_choice)
        elif Use_choice=="q" :
            print("--------shopping list---------")
            for i in Shopping_Cart:
                print(i)
            exit("成功退出购买商品")
        else:
            print("please input Correct commodinty num 33[31;1m %s 33[0m"%Use_choice)
else:
    print("33[31;1mplease input Correct salary %s 33[0m"%salary)