本文主要内容：用python实现一个购物程序
功能介绍：
1、显示商品列表
2、根据输入的工资判断是否能买得起选择的商品
3、购物车存放已经购买的商品

#1.购物车程序
# 输入工资
while True:
    wage = input("请输入您的工资:")
    if not wage.isdigit():
        print("请输入整数")
    else:
        wage=int(wage)
        break

# 商品列表
goods = [
    {"id": 1, "name": "iPhone", "price": 5000},
    {"id": 2, "name": "MacBook", "price": 9000},
    {"id": 3, "name": "iPad", "price": 3000}
]
# 打印商品列表
print("商品列表:")

for i, commodity in enumerate(goods):
    print(f"{i + 1}. {commodity['name']}   价格:{commodity['price']}")

# 购物循环
cart = []
while True:
    # 选择商品
    id = int(input("请输入商品编号(0退出):"))
    if id == 0:
        break

    # 检查商品是否存在
    g = None
    for commodity in goods:
        if commodity["id"] == id:
            g = commodity
            break
    if not g:
        print("商品不存在!")
        continue

    # 检查余额是否足够
    if g["price"] > wage:
        print("余额不足!")
        continue

    # 购买商品
    cart.append(g)
    wage -= g["price"]
    print("购买成功!")

    # 打印购物车和余额
    print("购物车:", end="")
    for c in cart:
        print(c["name"], end=",")
    print()
    print("余额:", wage)
# 如果购物车为空
if not cart:
    print("您未购买任何商品! 余额:", wage)
else:
    print("购物结束,您的购物车为:", end="")
for c in cart:
    print(c["name"], end=",")
print("\n余额:", wage)

执行效果：